Expert Commentary Archives

Figure 1. Seismotectonics of the Philippine Fault showing the location and focal mechanisms of more than 60 earthquakes with magnitudes of 5.0 or greater occurring in the last 52 years. Data sources: Jarvis et al., 2008 for SRTM topography; Weatherall et al., 2020 for bathymetry; GCMT, USGS and PHIVOLCS for earthquake data. The Generic Mapping Tool (Wessel and Smith, 1995) was used to generate the map. Credit: Aurelio et al., 2025 CC BY-NC-ND 4.0

Beware quiet segments of the Philippine Fault

Although scientists were not entirely surprised by the magnitude 7.7 earthquake that struck Myanmar on March 28, 2025, the event is a stark reminder that similar active structures exist — …

Figure 1. Damage to buildings within the Swayambhu Temple complex, known colloquially as the Monkey Temple. Damage at the site may have been exacerbated by amplification of seismic waves (topographic amplification) associated with the small hill on which the complex was built (Sánchez-Sesma, 1993). The top of the hill is about 75 meters above the adjacent valley. Credit: Susan Hough, U.S. Geological Survey, public domain

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Destruction and Transformation: Lessons learned from the 2015 Gorkha, Nepal, earthquake

By Surya Narayan Shrestha (National Society for Earthquake Technology, Kathmandu, Nepal) and Susan E. Hough (U.S. Geological Survey, Pasadena, California. USA) Citation: Narayan Shrestha, S. and Hough, S.E., 2025, …

Figure 1. Location of magnitude 5 and greater earthquakes (stars, 1937 - present, N=51) in southern California. Notice how the Julian earthquake (red star) occurred in a region that historically did not host large earthquakes. Highlighted are the Elsinore (green), Laguna Salada (brown), and Whittier (light blue) faults. The San Andreas fault runs on the east side of the Salton Sea. The San Jacinto fault is sandwiched between the San Andreas and Elsinore faults. Credit: Kilb et al., 2025, CC BY-NC-ND 4.0

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Knock, knock, knocking on your door – the Julian earthquake in southern California issues reminder to be prepared

Minimal damage from the Julian earthquake should result in maximum earthquake preparedness efforts. By Debi Kilb (Scripps Institution of Oceanography at UCSD), Alice-Agnes Gabriel (Scripps Institution of Oceanography at …

Figure 1. The April 23 magnitude 6.2 earthquake struck along the central portion of the Marmara Fault, which was also the site of large shocks in 1509 and May and August 1766. The recent event is surrounded by ruptures of large shocks in 1912 (Aksoy, 2021) and 1999 (Parsons, 2004). Credit: Temblor, CC BY-NC-ND 4.0

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A magnitude 6.2 quake strikes the Marmara Fault at site of large historic earthquakes near Istanbul

The 23 April 2025 earthquake appears to have ruptured a 20-kilometer-long section of the Marmara Fault, near the site of a 2019 magnitude 5.7 shock. Previous major events include earthquakes …

Figure 1. Less than ten days after the earthquake, Aholotu Palu, CEO of Pacific Catastrophe Risk Insurance Company (at left), handed the check to Hon. Charlot Salwai Tabimasmas, Prime Minister of Vanuatu (at right). Credit: PCRIC, used with permission

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2024 Vanuatu earthquake triggered rapid insurance payout for emergency response

Much of the world lacks earthquake insurance, but when a magnitude 7.3 earthquake struck Vanuatu, the Pacific island nation was protected. By Ross S. Stein and Gabriel Lotto, Temblor, …

Figure 2: Seismotectonic map of southwestern Luzon. This map shows the distribution of shallow to intermediate-depth earthquakes in the area. These earthquakes illuminate the complex tectonic setting. The focal mechanisms (earthquake beach balls) illustrate how the faults move during earthquakes. The blue line marked A-A’ denotes the location of the cross section shown in Figure 3. Data sources: Earthquake locations, focal mechanisms, and active faults and trenches from DOST-PHIVOLCS. Credit: Llamas et al., 2025, CC BY-NC-ND 4.0

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Shaken again: Unraveling the sources of earthquakes in southwestern Luzon, Philippines

In late January, a moderate earthquake struck offshore southwestern Luzon, Philippines, and was felt across Metro Manila. DOST-PHIVOLCS scientists explain what’s going on. By Deo Carlo E. Llamas (@deotectonics), …

Figura 5: Mapa mostrando la distribución espacial de sismos sentidos en Costa Rica entre el 2010 y 2023 con magnitudes mayores o iguales a 6.0. El tamaño y color de los círculos indican su magnitud y profundidad, respectivamente. Créditos: Chaves, 2024, CC BY-NC-ND 4.0

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El catálogo sísmico de Costa Rica desmiente un mito popular

El análisis de 14 años de registros sísmicos revela que estos eventos no son estacionales Por Esteban J. Chaves, Observatorio Vulcanológico y Sismológico de Costa Rica, OVSICORI, Universidad Nacional …

Figure 5. Map showing the distribution of earthquakes felt in Costa Rica between 2010 and 2013 with a magnitude greater than or equal to 6.0. The size and color of the circles indicate their magnitude and depth, respectively. Credit: Chaves, 2024, CC BY-NC-ND 4.0

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Costa Rica’s digital earthquake catalog quashes a common misconception

Analysis of 14 years of earthquake records reveals that these events aren’t seasonal By Esteban J. Chaves, Ph.D., Volcanological and Seismological Observatory of Costa Rica OVSICORI, Universidad Nacional …

Figure 2. A coconut tree in Palanas, Masbate, located at the middle portion of the onshore segment of the Masbate segment of the Philippine Fault, was left-laterally displaced by the 2003 magnitude 6.2 and the 2020 magnitude 6.6 earthquakes. The left photo was taken by the DOST-PHIVOLCS QRT after the 2003 earthquake, whereas the right photo was taken during the DOST-PHIVOLCS-led field investigation after the 2020 earthquake. Credit: Left photo from 2003 DOST-PHIVOLCS QRT report, right photo from Llamas et al. (2021), annotations by Llamas and Aurelio, 2024

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Two strong earthquakes separated by 17 years strike the same fault

As we reflect on the fourth anniversary of the 2020 Masbate earthquake, a coconut tree underscores the significance of short recurrence intervals and precise locations of fault ruptures. By …

Figure 1a. Seismotectonics of the magnitude 6.8 earthquake of August 3, 2024 in the province of Surigao Del Sur, Mindanao (southern Philippines) in relation to the magnitude 7.4 earthquake of December 3, 2023 in the same province. The result of Coulomb Stress Transfer (CST) modeling is shown. In this model, the fault that generated the magnitude 7.4 earthquake of December 3, 2023 serves as source fault (thrust mechanism) and the fault that generated the August 3, 2024 earthquake serves as receiver fault (thrust fault mechanism). Focal mechanism solutions of the August 2024 mainshock and six succeeding aftershocks with magnitudes ranging from magnitude 4.8 to 6.2, and other post-mainshock events of lower magnitudes (small circles) are shown. Location of cross section in Figure 1b is shown (A-A’). Data: Jarvis et al., 2008 for SRTM topography; Weatherall et al., 2020 for bathymetry; Toda et al., 2011 for CST modeling; PHIVOLCS for earthquake data. GMT (Wessel and Smith, 1995) was used to generate the map. Credit: Aurelio and Catugas, 2024, CC BY-NC-ND 4.0

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Earthquake model successfully forecasts location of August 3 magnitude 6.8 event

The earthquake that struck offshore eastern Mindanao in the southern Philippines on August 3, 2024 resulted from renewed movement of an extinct fracture zone subducting into Earth’s mantle. That movement …

Figure 7. We calculate that the magnitude 7.1 event brought the southwest edge of the 1946 rupture surface just 0.01 bar closer to failure. This is a negligible amount. In an attempt to be as realistic as possible, here we are calculating the stress in the local fault slip direction (‘rake’) in the rupture model of Kato and Ando (1997). The red halo around the 2024 shock results from the stress increases on adjacent thrust faults. Credit: Temblor, CC BY-NC-ND 4.0

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Japan’s magnitude 7.1 shock triggers megaquake warning. How likely is this scenario?

The largest shocks in the Nankai subduction zone range between magnitude 8 and 9 and occur every 100 to 200 years. But, the recent magnitude 7.1 shock occurred in a …

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Earthquakes rattle Palawan, Philippines: Is the region as stable as we thought?

The Philippine island of Palawan — considered a stable part of the seismically active country — was recently shaken by two earthquakes in two days, highlighting the need to reassess …

Figure 1. Figure 1. Spatial distribution of mainshocks with magnitude greater than or equal to 7.5 examined for dynamic triggering in Costa Rica. Each event is represented by its focal mechanism (also called a beachball diagram in reference to the average representation of the fault’s geometry). The events are also color coded by year of occurrence. Credit: Hajaji and Chaves, 2024, CC BY-NC-ND 4.0

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Large, distant earthquakes can trigger microseismicity in Costa Rica

For the first time in Costa Rica, scientists document that earthquakes can communicate with faults, even at a distance of more than a thousand kilometers. By Sonia Hajaji and …

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Stress releases at seismic gaps: Sunod-sunod na mga lindol tumama sa Silangang Mindanao

Mga lindol na kasalukuyang nagaganap sa silangang Mindanao, siniyasat ng mga siyentipiko mula sa DOST-PHIVOLCS By Deo Carlo E. Llamas, Jeffrey S. Perez, Crystel Jade M. Legaspi, Jonard Jhon …

Figure 1. Seismotectonics of eastern Mindanao, at a depth of 10 kilometers, with recent seismic activity. This figure illustrates the Coulomb stress change resulting from the sequence of earthquakes off the coast of eastern Mindanao, utilizing optimally oriented strike-slip faults as receivers. Recent seismicity along the Philippine Fault is also shown. Data sources: Earthquake locations from PHIVOLCS and GFZ, focal mechanisms and location of active faults and trenches from PHIVOLCS, and SAR-derived topography from NAMRIA. Credit: Llamas et al., 2024, CC BY-NC-ND 4.0

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Stress releases and seismic gaps: Earthquake sequences strike Eastern Mindanao, Philippines

DOST-PHIVOLCS scientists explore recent seismicity in eastern Mindanao, a southern Philippine island. By Deo Carlo E. Llamas, Jeffrey S. Perez, Crystel Jade M. Legaspi, Jonard Jhon S. Acid, John …

Figure 6. Stress transferred by the 2024 magnitude 7.5 earthquake to the surrounding faults indicates that several faults beyond the ends of the rupture were likely brought closer to failure (NT9, NT10, KZ1, KZ2, SD05, SD06). In contrast, most faults in Toyama Bay should be inhibited from failing as a result of the mainshock. Credit: Toda and Stein, 2024, CC BY-NC-ND 4.0

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Intense seismic swarm punctuated by a magnitude 7.5 Japan shock

A magnitude 7.5 earthquake on the western shores of Honshu, Japan, caused extreme shaking and felled a five-story building on New Year’s Day. The shaking was far more severe than …

Figure 1a. Seismotectonics ng magnitude 7.4 na lindol noong Disyembre 2, 2023, sa lalawigan ng Surigao Del Sur, Mindanao (katimugang Pilipinas). Resulta ng Coulomb stress change modelling gamit ang magnitude 7.4 mainshock bilang source fault (thrust mechanism) at ang sumunod na event (normal fault) bilang receiver fault. Ipinapakita rin ang focal mechanism solution ng mainshock (M7.4) at 24 na mga sumunod na seismic events na may magnitude mula 4.9 hanggang 6.8, at iba pang mga post-mainshock events na may mas mabababang magnitude (maliit na bilog). Ang lokasyon ng mga cross sections sa Figure 1b at 2, at ang Coulomb stress transfer cross section ng Figure 3 ay makikita rin sa mapa. Mga datos: Jarvis et al., 2008 para sa SRTM topography; Weatherall et al., 2020 para sa bathymetry; Toda et al., 2011 para sa CST modeling; PHIVOLCS para sa datos ng lindol. GMT (Wessel at Smith, 1995) ang ginamit upang likhain ang mapa. Tingnan ang teksto para sa higit pang talakayan. Credit: Aurelio, Catugas, Anicete, 2023

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Serye ng lindol sa Silangang Mindanao, tumama sa pumapailalim na extinct fracture zone

Sa may silangang baybayin ng Isla ng Mindanao sa katimugan ng Pilipinas, malalakas na lindol ang nagmumula bunsod ng labis na aktibidad ng Philippine Trench. Ngunit ang iba’t-ibang fault mechanisms …

Figure 1a Seismotectonics of the magnitude 7.4 earthquake of Dec. 2, 2023, in the province of Surigao Del Sur, Mindanao (southern Philippines). Result of Coulomb stress change modeling shown, using the magnitude 7.4 mainshock as source fault (thrust mechanism) and the next event (normal fault) as the receiver fault. Focal mechanism solutions of the mainshock (7.4) and 24 succeeding seismic events with magnitudes ranging from magnitude 4.9 to 6.8, and other post -mainshock events of lower magnitudes (small circles) are shown. Locations of cross section Figures 1b and 2 and Coulomb stress transfer cross section Figure 3 are shown. Data: Jarvis et al., 2008 for SRTM topography; Weatherall et al., 2020 for bathymetry; Toda et al., 2011 for CST modeling; PHIVOLCS for earthquake data. GMT (Wessel and Smith, 1995) was used to generate the map. See text for more discussion. Credit: Aurelio, Catugas, Anicete, 2023.

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Eastern Mindanao earthquake sequence strikes on subducting, extinct fracture zone

Off the eastern shore of Mindanao Island in the southern Philippines, large magnitude earthquakes result from the highly active Philippine Trench. But the varied fault mechanisms of the recent magnitude …

Mapa ng mga nagdaang lindol na may tsunami sa isla ng Mindanao sa Pilipinas. Ipinapakita rin ang focal mechanisms para sa 2023 magnitude 6.8 offshore Davao Occidental Earthquake at sa 2023 magnitude 7.4 offshore Surigao del Sur Earthquake are shown. Credit: DOST-PHIVOLCS

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Dalawang lindol sa karagatan ng Pilipinas: Ano ang dapat malaman ng mga pamayanang nasa baybayin?

Sa nakaraang ilang lingo, dalawang lindol na may Magnitude 6.8 at 7.4 ang tumama sa Mindanao. Ang malakas na pagyanig ay nagdulot ng pagkasira sa mga istruktura, liquefaction, landslides, pagbabago …

Past tsunamigenic earthquakes around Mindanao Island, Philippines. The focal mechanisms for the 2023 magnitude-6.8 offshore Davao Occidental Earthquake and the 2023 magnitude-7.4 offshore Surigao del Sur Earthquake are shown. Credit: DOST-PHIVOLCS

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Two offshore earthquakes in the Philippines: What do coastal communities need to know?

Magnitude 6.8 and 7.4 earthquakes struck Mindanao Island in the last couple of weeks. The strong ground shaking caused significant structural damage, liquefaction, landslides, sea-level disturbance and tsunamis. Experts examine …

Rift zones and volcanic zones of Iceland. The Reykjanes Peninsula — the site of regular volcanic activity since 2021 — is outlined with a black rectangle. The vil-lage of Grindavík lies on the southern coast of the Peninsula and has currently been evacuated due to a potential volcanic eruption. Credit: derivative work, original by Chris.urs-o, CC BY-SA 3.0, via Wikimedia Commons. Additional annotation by Melissa Scruggs

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Iceland’s ground swells as volcanic eruption looms near Grindavík

How close is Iceland’s Grindavík to a volcanic eruption? Read the latest developments here. By Melissa Scruggs, Ph.D., Science Writer (@VolcanoDoc) Citation: Scruggs, Melissa A., 2023, Iceland’s ground …

A surface rupture near where the maximum surface displacement occurred from the magnitude-7.1 earthquake that struck the Ridgecrest, California, area in 2019. Credit: USGS/Ben Brooks

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New model tackles immature faults and their widespread fractures

Immature faults, such as those in the Eastern California Shear Zone, generate widespread fracturing at the surface during earthquakes. A new displacement model characterizes the hazard posed to infrastructure by …

Figura 3. En esta imagen, similar a un ShakeMap del USGS, se calculó la PGA para la región utilizando un terremoto de magnitud 6,8 a 26 kilómetros de profundidad en el epicentro del USGS (estrella blanca). El movimiento está representado por la aceleración máxima del suelo (PGA) en unidades de g, la aceleración de la gravedad. Temblor Shaking Footprint utiliza el modelo de movimiento del suelo (T-GMM) y el modelo de amplificación del sitio (SiteAmp) de Temblor. El movimiento del suelo disminuye con la distancia al epicentro, pero se amplifican en las cuencas. Una amplia cuenca se encuentra al norte y contiene la ciudad de Marrakech. Otra cuenca estrecha se encuentra al sur. Crédito: Temblor, CC BY-NC-ND 4.0

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El mortal terremoto de Marruecos fue el resultado de la continua colisión de África con Europa

El devastador terremoto que sacudió Marruecos el 8 de septiembre de 2023 cobro la vida de miles de personas. Si bien no fue un evento sin precedentes, tuvo lugar en …

Figure 3. Sur cette image, l'empreinte des secousses du Temblor, qui est similaire à une carte des secousses de l'USGS, a été calculée pour la région à partir d'un tremblement de terre de magnitude 6,8 à 26 kilomètres de profondeur à l'épicentre de l'USGS (étoile blanche). Les secousses sont représentées par l'accélération maximale du sol (PGA) en unités de g, l'accélération gravitationnelle. L'empreinte des secousses de Temblor utilise le modèle de mouvement du sol de Temblor (T-GMM) et le modèle d'amplification du site (SiteAmp). Les secousses diminuent avec la distance de l'épicentre, mais sont amplifiées dans les bassins. Un large bassin se trouve au nord et contient la ville de Marrakech. Un autre bassin étroit se trouve au sud. Crédit : Temblor, CC BY-NC-ND 4.0

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Le tremblement de terre meurtrier au Maroc résulte de la collision actuelle entre l’Afrique et l’Europe

Le tremblement de terre dévastateur qui a frappé le Maroc le 8 septembre 2023 a tué des milliers de personnes. Il n’était pas sans précédent, bien qu’il se soit produit …

Figure 3. In this image, the Temblor Shaking Footprint, which is similar to a USGS ShakeMap, has been calculated for the region using a magnitude-6.8 source earthquake at 26 kilometers depth at the USGS epicenter (white star). Shaking is represented by the peak ground acceleration (PGA) in units of g, gravitational acceleration. The Temblor Shaking Footprint uses Temblor's ground motion model (T-GMM) and site amplification model (SiteAmp). A broad basin lies to the north and contains the city of Marrakech. Another narrow basin lies to the south. Shaking diminishes with distance from the epicenter, but is amplified in these basins. Credit: Temblor, CC BY-NC-ND 4.0

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Deadly Morocco quake resulted from Africa’s ongoing collision with Europe

The devastating earthquake that struck Morocco on September 8, 2023 killed thousands of people. It was not unprecedented, although it did occur in a less seismically active zone than other …

This map shows the locations of the mainshock and two large aftershocks that struck Colombia on the afternoon of Thursday, August 17, 2023. The earthquake magnitudes and locations come from the U.S. Geological Survey catalog, instead of the local network. Credit: Temblor, CC BY-NC-ND 4.0

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Serie de sismos sacude el centro de Colombia

Ayer, una serie de sismos, comenzando con un evento de magnitud 6,1, sacudió Bogotá, la capital de Colombia, y otras ciudades a lo largo de la Cordillera Oriental. By …

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Earthquake Sequence Rattles Central Colombia

Yesterday, a series of earthquakes, starting with a magnitude-6.1 event, shook Colombia’s capital city of Bogotá and other cities along the Eastern Cordillera. By Albert Leonardo Aguilar Suarez, Ph.D. …

The beauty of North Sulawesi belies its geologic hazards. Credit: MaRo-Visions, CC BY-SA 4.0

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Disaster training begins in tourist hot spot Likupang, Indonesia

Indonesian scientists fulfill the need for earthquake education on islands replete with tectonic-related hazards, starting with North Sulawesi. By Anne Sirait, Geophysics Program, Universitas Indonesia and Seismology Division of …

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Magnitude-4.4 earthquake rattles the Bay Area and Salinas Valley

Hollister and Bay Area residents saw their afternoon interrupted by a magnitude-4.4 temblor on April 4. The event, which occurred after 3 p.m. with an epicenter near Tres Pinos, was …

On March 31, a magnitude-4.2 struck near the Palomar Observatory in Southern California. Credit: Signal Mirror, CC BY 2.0

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Palomar Observatory earthquake rocks Southern California

A magnitude-4.2 earthquake shook Southern California last Friday. The event, with an epicenter 3 miles from Caltech’s Palomar Observatory, was felt widely throughout San Diego and the Los Angeles area. …

Eric Garcetti, former mayor of Los Angeles, speaks at the Valley Economic Alliance Luncheon at California State University, Northridge on the 20th anniversary of the Northridge earthquake. Credit: courtesy of Eric Garcetti, CC BY-NC-ND 2.0

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Los Angeles mayor, now ambassador, talks earthquake resilience

Former Los Angeles Mayor Eric Garcetti, who was just confirmed as the next ambassador to India, talks with Temblor about resilience, the importance of neighborhoods and his love of earthquakes. …

The largest payouts in the 16-year history of the CCRIF are for storm damage, like Tropical Cyclone Dorian, which caused about $3.4 billion damage in the Bahamas in 2019. CCRIF paid out about $12,800,000 to the Bahamas shortly after that storm struck the island nation. Credit: Seaman Erik Villa Rodriguez/ U.S. Coast Guard

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Desarrollo de nuevos modelos paramétricos de seguros por terremoto para el Caribe y Centroamérica

Las pólizas de seguro paramétricas realizan los pagos basados en unas reglas preestablecidas, como por ejemplo la magnitud y/o ubicación de un terremoto. Algunos países pueden beneficiarse de los desembolsos …

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Developing new parametric insurance models for Caribbean and Central American countries

Parametric insurance policies pay based on pre-agreed thresholds like the magnitude and/or location of an earthquake. Some countries benefit from rapid payouts using this type of insurance. By Mario …

If you're visiting New Zealand, learn about what hazards you might face. Auckland, for example, is built on a vol-canic field. Credit: Craig, via Wikimedia Commons, CC BY 2.0

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Earthquakes, volcanoes, tsunamis and landslides: How Aotearoa New Zealand manages a medley of hazards

Temblor chats with Gill Jolly, research leader for the Natural Hazards and Risks arm of GNS Science Te Pū Ao, the government agency that conducts geological and geophysical monitoring of …

Figure 5. The roughly 600-kilometer-long East Anatolian Fault from Emre et al. (2018) is highlighted by a 20-kilometer-wide translucent yellow band. The inset surface rupture map from Rietman et al. (2023) is at the same scale as the active fault map. Surprisingly, neither the magnitude-7.8 nor the magnitude-7.5 shock nucleated on the East Anatolian Fault.

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Interactions, stress changes, mysteries, and partial forecasts of the 2023 Kahramanmaraş, Türkiye, earthquakes

Brought closer to failure by the Feb. 6, 2023, magnitude-7.8 shock, the magnitude-7.5 shock that struck nine hours later caused aftershocks to turn on in some zones and off in …

Figure 3. The source regions of the two major earthquakes are depicted by the aftershocks located by Kandilli Observatory and Earthquake Research Institute (KOERI). The color of the symbols indicates the time elapsed since the origin time of the first event (Feb. 6, 2023, 01:17 GMT) The stars indicate the rupture initiation locations. The solid lines identify the active faults reported by Emre et al. (2012). Credit: Erdik, Tümsa, Pınar, Altunel, and Zülfikar

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A preliminary report on the February 6, 2023 earthquakes in Türkiye

At 4:17 a.m. on Feb. 6, 2023, a magnitude-7.8 earthquake struck near Pazarcık City in south-central Türkiye, followed by a magnitude-7.5 event about 9 hours later. In this report, scientists …

Fig 2. Mapa mostrando la distribución espacial de los 3 eventos de mayor magnitud generados en el segmento Este de la Falla Anatolia. El sismo de M 7.8 del 6 de febrero rompió el Gap Suroeste del EAFZ y activó el sistema de falla Sürgü con terremoto de magnitud 7.5. Imagen adaptada de Temblor.net.

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Los terremotos devastadores en Turquía y la frontera noroeste de Siria

El segmento Este de la Falla Anatolia en Turquía fue un gigante que despertó el 6 de febrero de 2023, generando un terremoto de Magnitud 7.8, con consecuencias devastadoras. Este …

Burada 7.8 ve 7.5 büyüklüğündeki iki depremin yanı sıra, 2020 Elazığ 6.8 depreminin gerilme yüklemesinin bileşkesini Doğu Anadolu Fay Zonu'nun genel karakterine uygun idealleştirilmiş faylara uyguluyoruz.

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Gerilme değişimi hesaplamaları, 2023 Türkiye depremlerinde artçı şoklar için ipuçları veriyor

Sürgü ve Çardak faylarındaki 7.5 büyüklüğündeki depremin, 110 kilometre güneyde meydana gelen Doğu Anadolu Fayındaki 7.8 büyüklüğündeki deprem ile tetiklenmiş olabileceğini erken verilere ve modellere dayalı Coulomb gerilim hesaplamaları göstermektedir. …

Here we combine the stress imparted by the 2023 magnitude-7.8 and magnitude-7.5 quakes as well as the 2020 magnitude-6.8 event, to an idealized East Anatolian Fault Zone trend.

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Stress change calculations provide clues to aftershocks in 2023 Türkiye earthquakes

Coulomb stress calculations based on preliminary data and models suggest that the magnitude-7.5 shock on the Sürgü and Çardak faults was brought closer to failure by the magnitude-7.8 rupture on …

The magnitude-6.4 quake struck within the Mendocino Triple Junction, where three tectonic plates meet. Because the junction is distorted and compressed, deformation is distributed across a network of faults, one of which ruptured on Dec. 20, 2022. Historically, the junction has been extremely seismically active, but fortunately it is more lightly populated and better prepared than most areas in the United States. The arrows give the sense of motion of the faults. The color ramp gives the magnitude (within 100 kilometers) that’s likely in a lifetime. Note that likely maximum magnitude within 100 kilometers of the Mendocino region in a lifetime is magnitude 7.2.

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December 2022 California earthquake ruptured unknown fault: An analysis

The quake produced severe shaking in a lightly populated area, brought the southern tip of the Cascadia Subduction Zone slightly closer to failure, and modestly inhibited rupture on the San …

Figure 3. Examples of structural damage in Düzce and Gölyaka. Credit: Adapted from Özalp and Kürçer, (2022)

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What happened in Düzce? A preliminary assessment of the November 23 quake in Western Turkey

A magnitude-6.1 earthquake that shook western Turkey in November struck a region that also shook in August and November 1999. Reports of shaking revealed significant variation in intensity. Why? …

Figure 1 Seismotectonics of the two earthquakes affecting the province of Abra in northern Philippines in less than three months this year, namely a magnitude 7.0 July 27 and a magnitude 6.4 October 25. Result of Coulomb stress change modeling shown, using the July earthquake as source and the northeast striking, southeast dipping nodal plane of the focal mechanism solutions of the October earthquake as the receiver. Aftershocks of the two seismic events are shown as light purple circles with purple outline for the July earthquake, and light green circles with green outline for the October earthquake. Gray circles with white outline are background historical earthquake epicenters. Inset map on the lower right corner indicates place names of towns and provinces discussed in the text. Locations of CST cross sections A-A’, B-B’ and C-C’ shown in Figure 2 indicated as light green lines. References: Jarvis et al., 2008 for SRTM topography; Weatherall et al., 2020 for bathymetry; Toda et al., 2011 for CST modeling; PHIVOLCS for earthquake data. GMT (Wessel and Smith, 1995) was used to generate the map. See text for more discussion. Credit: Aurelio, Catugas, Ramirez, Aurelio, Lagmay.

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Two large quakes hit Abra, Philippines, in three months. What does this mean?

An October magnitude-6.4 quake succeeded a July magnitude-7.0 earthquake that struck the same region. What do these quakes tell us about the faults involved and whether the second was an …

Lava flows are moving northeast down the slopes of Mauna Loa volcano for the first time in 38 years. View from Saddle Road at 6:00 a.m. on Nov. 29, 2022. Credit: USGS.

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Earth’s largest volcano has started erupting. What might we expect?

After months of heightened earthquake activity, Earth’s largest volcano has erupted for the first time in 38 years. Previous eruptions of Mauna Loa can give scientists some clues as to …

More than 22,000 houses were destroyed or damaged in the magnitude-5.6 earthquake on West Java. Credit: ABSEE HOUSE / Shutterstock.com

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Gempa Kerak Dangkal Mengguncang Jawa Barat

Minggu ini, gempa dengan magnitudo mengguncang Jawa Barat, Indonesia, mengakibatkan getaran dan kehilangan. Oleh Anne Sirait, Ph.D., Program Studi S1 Geofisika, Universitas Indonesia dan anggota Divisi Seismologi Himpunan Ahli …

The earthquakes in the catalog struck over much of southern Mexico.

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No, septiembre no es el “mes de los sismos” en México

Aunque septiembre ha tenido algunos sismos importantes en los últimos años, no hay nada especial en este mes. Por Manuel J. Aguilar-Velázquez (@ManuAguilar411), R. Daniel Corona-Fernández (@rdcoronaf), y Miguel …

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Is September really “earthquake month” in Mexico?

Though September has seen a few big earthquakes in recent years, there is nothing special about the month. By Manuel J. Aguilar-Velázquez (@ManuAguilar411), R. Daniel Corona-Fernández (@rdcoronaf), and Miguel …

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A shallow crustal earthquake impacts West Java

A shallow, moderately sized magnitude-5.6 crustal earthquake rattled West Java, Indonesia, this week, causing shaking and loss. By Anne Sirait, Ph.D., Department of Geophysics, University of Indonesia and a …

View of the Pacific Ocean and volcanoes of the San Quintin volcanic field, near the epicenter of the Nov. 22, 2022, magnitude-6.2 earthquake in Baja California. Credit: Luis A. Yegres Herrera.

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Three earthquakes strike near the western US-Mexico border

Three unrelated magnitude-6-plus earthquakes shook Baja California in three weeks, on three different faults. By Hector Gonzalez-Huizar, Ph.D., Centro de Investigación Científica y de Educación Superior de Ensenada, Baja …

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近即時地震資料處理有助科學家了解地震特性

一個利用人工智慧自動偵測和定位地震的新方法。該系統成功的定位了臺灣最近的地震，並幫助科學家們追蹤正在進行的地震分布。作者: 郭陳澔博士、孫維芳、黃俊銘、潘勝彥, 國立臺灣大學 Citation: Kuo-Chen, H., Sun, W., Huang, C., Pan, S., 2022, 近即時地震資料處理有助科學家了解地震特性, Temblor, http://doi.org/10.32858/temblor.276 This article is also available in English. 9 …

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Near real-time seismic data processing helps scientist understand aftershocks

A new method of automatically detecting and locating earthquakes utilizes artificial intelligence. The system successfully located recent Taiwan earthquakes and could help scientists monitor ongoing events. By Hao Kuo-Chen, …

Likelihood of large earthquakes on Taiwan’s major faults.

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台灣雙地震似乎引發了建築物倒塌的「殺手脈衝」

這次的地震震動程度比2500年回歸週期預期的還要大。前震可能留下了主震即將來臨的預兆。陳薇安、詹忠翰 (中央大學地震災害鏈風險評估及管理研究中心) Citation: Chen, W., Chan, C., 2022, Taiwan’s double earthquake appears to have launched a ‘killer pulse’ that toppled buildings, Temblor, http://doi.org/10.32858/temblor.274 This article is …

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Taiwan’s double earthquake may have launched a ‘killer pulse’

The shaking from the magnitude-6.8 mainshock was larger than expected in 2500 years. The foreshock may have left a seismic warning that another quake was coming. By Wei-An Chen, …

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Taiwan earthquake sequence may signal future shocks

Magnitude-6.5 and 6.9 earthquakes struck Taiwan’s seismically active east coast this week. The risk of more shaking is now elevated. By Shinji Toda, Ph.D., IRIDeS, Tohoku University, and Ross …

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Terremoto en México parcialmente recarga falla que causó el devastador sismo de 1985

Aunque sea poco probable que este cause otro gran terremoto en el futuro cercano, aproximadamente una cuarta parte de la superficie de la falla que causó el terremoto de 1985 …

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Mexico earthquake partially reloads fault that ruptured in devastating 1985 shock

Though unlikely sufficient to trigger another great earthquake soon, about one-quarter of the fault surface that broke in the 1985 earthquake is now closer to failure. By Ross S. …

Damage caused by the earthquake in the town of Tacátzcuaro, Michoacán, some 180 kilometers (112 miles) away from the epicenter. Credit: Tehuan Madrigal.

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México es sacudido por dos terremotos

El terremoto, que se generó en la costa del Pacifico en México, redistribuyó los esfuerzos en la región. Por Hector Gonzalez-Huizar, Ph.D., Centro de Investigación Científica y de Educación …

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Mexico rattled by pair of earthquakes

The earthquake, which struck along Mexico’s Pacific coast, redistributed stress in the region. By Hector Gonzalez-Huizar, Ph.D., Centro de Investigación Científica y de Educación Superior de Ensenada, Baja California …

map with red lines for faults and blue star for epicenter

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Rodgers Creek Fault shakes Bay Area, not for the first time

On Tuesday, the Bay Area was reminded once again that the faults that dissect the region are active. Local streams record how the region’s faults slowly shape the landscape. …

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Fault that caused a July quake in the Philippines still in question

A segment of the Philippine Fault system is the main suspect for the recent magnitude-7.0 earthquake. But surface ground rupture has not yet been found. Is that the whole story? …

تصویری از کابل که خانه های خشتی و گلی را نشان می دهد که در دامنه های میلان تند کوه ساخته شده اند. عکس از ذکریا شنیزی

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عوامل متعددی جوامع افغانی را در برابر زلزله ها آسیب پذیر می سازد

هنگامکی یک زلزله به بزرگی ۶.۱ درجه ریشتر در ماه جون افغانستان را تکان داد، آسیب پذیری‌های طولانی مدت بشمول موجودیت شکستگی‌های فعال منطقوی، ساخت وساز سنتی خانه‌ها و منازل …

د کابل یوې سیمې انځور چې د یوه غره په ستوغه (میلان لرونکي) ډډه باندې له خټینو موادو جوړ کورونه ښیئ. عکس ذکریا شنیزی

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ډیری عوامل افغاني ټولنې د زلزلې پر وړاندې زیانمنوي

کله چې د جون په میاشت کې د ریښتر په کچه یوې ۶.۱ درجې زلزلې افغانستان ولړزاوه، اوږدمهاله زیانمنتیاوې لکه د سیمیزو فعالو ماتو (درزونو) شتون، د کورو او استوګنیزو …

A photo from Kabul showing mudbrick homes built on steep mountain sides. Photograph by Zakeria Shnizai.

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Multiple factors make Afghan communities vulnerable to earthquakes

When a magnitude-6.1 quake struck Afghanistan in June, long-standing vulnerabilities — including a heavily faulted region, traditional adobe-style construction, and lack of enforceable building codes — were again revealed. …

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Megathrust earthquakes impact surrounding seismicity for centuries

Aftershocks of large earthquakes can be highly destructive. New evidence has emerged of both a shutdown and a persistence of such shocks following megathrust events throughout history. Ross S. …

The Milun Fault observatory project is located near Hualien, a coastal city in eastern Taiwan. Credit: Kuo-Fong Ma

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Drilling into a fault to capture 3D earthquake behavior

To know what happens to a fault during an earthquake, we need to have our eyes on it. A new drilling project gets instruments as close as possible to the …

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Shallow earthquake strikes west of Manila, Philippines

The magnitude-6.4 earthquake didn’t damage infrastructure, but it’s the latest to remind us that the Manila trench can generate big quakes near a populous metropolis. By Mario Aurelio, Sandra …

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玉里地震以及它的警示

玉里地震的特性與過去的地震活動相近，而未來鄰近區域有發生大地震的可能性。陳薇安、高若甄、詹忠翰 (中央大學地震災害鏈風險評估及管理研究中心) 引文: Chen, W., Kao J., Chan C., 2022, Magnitude-6.6 earthquake warns east-central Taiwan of shaking potential, Temblor, http://doi.org/10.32858/temblor.248 This article is also available in …

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Magnitude-6.6 earthquake warns east-central Taiwan of shaking potential

The pattern of recent earthquakes in the area indicated this event was likely, and an even larger quake is possible in the future. By Wei-An Chen, B.S., Jo-Chen Kao, …

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東北太平洋沿岸域を襲った三つ子の地震と未破壊域

3月16日深夜に東北地方を襲い東京に停電をもたらしたマグニチュード7．3の地震は，2011年東北沖地震の余震活動の1つとみられる遠田晋次（東北大学災害科学国際研究所）ロススタイン（テンブラー社） Citation: Toda, S., Stein, R., 2022, ‘Triplet’ earthquakes strike near Tohoku, Japan, but a rupture gap remains, Temblor, http://doi.org/10.32858/temblor.246 This article is also …

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‘Triplet’ earthquakes strike near Tohoku, Japan, but a rupture gap remains

Wednesday’s magnitude-7.3 quake, which shook large parts of Honshu and knocked out power to Tokyo, is the latest in a series of large aftershocks from the 2011 Tohoku earthquake. …

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Le tremblement de terre d’Haïti capturé par des citoyens-sismologues

Le réseau sismologique national d’Haïti était hors service lors du tremblement de terre de magnitude 7,2 survenu en 2021, mais un réseau de sismomètres peu coûteux hébergés par des citoyens …

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Haiti earthquake captured by citizen-seismologists

Haiti’s national seismometer network was down during the 2021 magnitude-7.2 earthquake, but a collection of low-cost citizen-hosted seismometers filled in. By Eric Calais, Ph.D., Ecole normale supérieure, and co-authors …

Satellite image of Hunga Tonga–Hunga Haʻapai eruption on January 15, 2022. Credit: Japan Meteorological Agency (CC BY 4.0), via Wikimedia Commons

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Underwater volcanoes are difficult to monitor. Tonga eruption shows why

Tonga’s underwater eruption hints at need for more seismic stations near such active, submarine volcanoes located near populated parts of the Pacific. By Lise Retailleau, Ph.D., Observatoire Volcanologique du …

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Gempa M6.2 mengguncang Pasaman, Sumatra Barat, Indonesia

Gempa mengguncang sebagian Sumatra dan Malaysia, menyababkan kerusakan dan korban jiwa. Oleh: Anne Sirait, Ph.D., Program Studi Geofisika, Universitas Indonesia, Dr. Daryono, BMKG Kutipan: Sirait, A., Daryono, 2022, …

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Magnitude-6.2 earthquake strikes Pasaman, West Sumatra, Indonesia

The earthquake shook parts of Sumatra and Malaysia. Some damage and casualties were reported. By Anne Sirait, Ph.D, Department of Geophysics, University of Indonesia, Dr. Daryono Indonesian Agency for …

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Gempa intraslab mengguncang (setengah) Java, Indonesia lagi

Gempa bermagnitude 6,6 mengguncang Jawa di pertengahan Januari, menyebabkan guncangan, tanpa tsunami. Oleh Anne Sirait, Ph.D., Program Studi Geofisika, Universitas Indonesia Citation: Sirait, A., 2022, Intraslab earthquake shakes …

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Intraslab earthquake shakes (half of) Java, Indonesia, again

A magnitude-6.6 earthquake rattled Java in mid-January, causing shaking, but no tsunami. By Anne Sirait, Ph.D., Department of Geophysics, University of Indonesia Citation: Sirait, A., 2022, Intraslab earthquake …

mountain in background highway crossing left to right across frame

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North of Los Angeles, Faults Share Earthquakes

The San Andreas and the San Jacinto faults have simultaneously ruptured in at least three earthquakes over the past 2000 years. By Alba M. Rodriguez Padilla, Ph.D. candidate, UC …

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新的一年北台灣的地動山搖

1 月 3 日台灣東部外海規模 6.0 的地震撼動了台北市區，但靠近震央的城市只有感覺到輕微的震動。陳薇安、詹忠翰 (中央大學地震災害鏈風險評估及管理研究中心) Citation: Chen, W., Chan, C., 2022, Northern Taiwan starts the new year with a jolt, Temblor, http://doi.org/10.32858/temblor.234 This article …

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Northern Taiwan starts the new year with a jolt

An offshore magnitude-6.0 earthquake on January 3 rattled the Taipei metropolitan area, but cities closer to the epicenter felt only light shaking. By Wei-An Chen, B.S., and Chung-Han Chan, …

Seismotectonics of six moderate magnitude, thrust-mechanism earthquakes (shown by beachballs) occurring in the same region in Batangas, southern Luzon, Philippines, within a period of five months (July 24 to December 13, 2021). Result of Coulomb stress change modeling shown. July 24 magnitude-6.6 as source, with optimally-oriented fault as receiver. References: Jarvis et al., 2008 for SRTM topography; Weatherall et al., 2020 for bathymetry; Toda et al., 2011 for Coulomb stress transfer modeling; PHIVOLCS for earthquake data. GMT (Wessel and Smith, 1995) was used to generate the map. See text for more discussion. Credit: Aurelio, Catugas, Escudero, Lagmay,Tapang

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Luzon, Philippines, sees sixth strong earthquake in five months

Is this an unusually productive aftershock sequence, or could these quakes prove to be foreshocks of a larger event that has yet to strike? By Mario Aurelio, Director of …

The Oregon Coast. Credit: plumdumplings, Pixabay

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Strong earthquake swarm ongoing off Oregon coast

The Pacific Northwest was jolted into the spotlight on Wednesday, when a series of strong earthquakes off the Oregon coast awakened fears of a big one. By Jochen Braunmiller, …

Acapulco de Juárez, Guerrero, México. Crédito: Herminio González Huizar

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El terremoto de Acapulco ocurrió en el límite de una brecha sísmica

El 7 de septiembre del 2021 ocurrió un fuerte terremoto cerca de Acapulco, México. El terremoto pudo haber incrementado la posibilidad de que ocurra un gran terremoto en la Brecha …

Location of the newly identified shallow faults (purple), areas of recent deformation (red) and the current surface trace of the NIFZ (yellow).

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Newly identified fault in Seal Beach, CA, quietly rattles beneath the city

A recent high-density seismic survey illuminated the previously unmapped fault and highlighted the challenge of determining earthquake hazard in the Los Angeles Basin. By Dan Gish and Steve Boljen, …

Acapulco de Juárez, Guerrero, México. Credit: Herminio González Huizar

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Acapulco earthquake struck the edge of a seismic gap

On September 7, 2021, a strong earthquake struck near Acapulco, Mexico. The earthquake may have increased the likelihood of a larger magnitude earthquake within the Guerrero Seismic Gap. By …

View over the Kīlauea lava field towards the ocean in the southeast of the Big Island of Hawaiʻi. Credit: L. Burkhard

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Hawaiʻi quake likely related to tectonic plate bending

On October 10, 2021, a magnitude-6.2 earthquake near the southern coast of the Big Island shook residents and visitors across the state of Hawaiʻi. By Liliane M.L. Burkhard, Lauren …

Larawan 1. Seismotectonics ng apat na moderate magnitude, thrust-mechanism ng lindol (ipinakita ng mga beachball) na nangyari sa parehong rehiyon sa Batangas, Southern Luzon, Philippines, sa loob ng siyam na linggo. Ang pinakahuling kaganapan ng Setyembre 27, 2021 ay ipinapakita ng pula para sa diin. Resulta ng Coulomb stress change modeling na ipinapakita kasunod ng Hulyo 6.6-magnitude na lindol. Mga Sanggunian: Jarvis et al., 2008 para sa topograpiyang SRTM; Weatherall et al., 2020 para sa bathymetry; Toda et al., 2011 para sa pagmomodelo ng CST; PHIVOLCS para sa data ng lindol. Ginamit ang GMT (Wessel at Smith, 1995) upang makabuo ng mapa. Kredito: Aurelio, Lagmay, Escudero, Catugas.

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Magnitude-5.7 na lindol sa Batangas, palaisipan sa mga mananaliksik

Ang pagyanig ng Lunes, ang pangatlong katamtamang lindol sa loob ng siyam na linggo, ay naganap kung saan nabawasan ang stress pagkatapos ng isang malakas na lindol noong Hulyo. Nais …

Building located on a fold scarp generated either during or soon after the 1999 magnitude-7.6 Chi-Chi earthquake in Taiwan. Credit: Yue-Gau Chen. Photo reproduced from Chen et al. (2007).

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An overlooked hazard can cause damage weeks after an earthquake strikes

Following the 1999 Chi-Chi earthquake in Taiwan, buildings were found precariously balanced on a slope. New modeling shows how to better plan for such damage. By Judith Hubbard, Ph.D. …

Figure 1 Seismotectonics of four moderate magnitude, thrust-mechanism earthquakes (shown by beachballs) occurring in the same region in Batangas, southern Luzon, Philippines, within a period of nine weeks. The most recent event of September 27, 2021 is shown in red for emphasis. Result of Coulomb stress change modeling following July maganitude-6.6 event shown. References: Jarvis et al., 2008 for SRTM topography; Weatherall et al., 2020 for bathymetry; Toda et al., 2011 for CST modeling; PHIVOLCS for earthquake data. GMT (Wessel and Smith, 1995) was used to generate the map. Credit: Aurelio, Lagmay, Escudero, Catugas.

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Magnitude-5.7 Batangas earthquake puzzles researchers

Monday’s tremor, the third moderate earthquake in nine weeks, occurred where stress had decreased after a strong earthquake in July. Researchers want to know why. By Mario Aurelio, Director …

small green, blue and yellow squares overlaid on green map.

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What controlled damage patterns during Australia earthquake?

The largest earthquake in Victoria in at least two centuries rattled buildings across Melbourne, but some were damaged more than others. By Mark Leonard, Ph.D., Leonard Seismic Consulting …

pink and gree dots on brown land surrounded by blue ocean

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Australia surprised by moderate quake, but rumbling is not unusual

Like a tree falling in the forest, if there is no one around to feel it, then an earthquake goes unnoticed. That doesn’t mean it didn’t happen. By Caroline …

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Moderate quake rattles southeastern Australia. Where’s the fault?

The magnitude-5.9 earthquake reminded residents that Victoria is active — geologically speaking — but identifying the fault responsible is complicated. By Dee Ninis, Ph.D. (@DeeNinis) and Elodie Borleis, B.Sc. …

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Mixed earthquake signals in the South Sandwich Islands

Aftershocks of the multiple large-magnitude earthquakes that occurred recently in the South Sandwich Islands suggest shallow rupture to the trench. By Judith Hubbard, Ph.D., Earth Observatory of Singapore, Nanyang …

Larawan 1 Seismotectonics ng tatlong moderate-magnitude, thrust-mechanism na lindol (na ipinakita ng mga beachball) na nangyayari sa parehong rehiyon sa Batangas, southern Luzon, Philippines, sa loob ng tatlong linggo. Ang mga unang resulta ng Coulomb stress transfer modeling ay ipinakita rin. Mga Sanggunian: Jarvis et al., 2008 para sa topograpiyang SRTM; Weatherall et al., 2020 para sa bathymetry; Toda et al., 2011 para sa pagmomodelo ng CST; PHIVOLCS para sa data ng lindol. Kredito: Aurelio, Lagmay, Escudero, Catugas

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Philippines fault Niyanig muli ang Batangas sa 5.8 magnitude na lindol

Ang 5.8-magnitude na lindol na naganap sa baybayin ng Batangas sa katimugang Luzon, Pilipinas, tatlong linggo lamang matapos ang isang 6.6 magnitude na lindol ay tumama sa parehong rehiyon, ay …

Larawan 1 - Tectonic map ng Pilipinas na nagpapakita ng mga aktibong subduction zones, internal active faults at lokasyon ng epicenters ng mga nakaraang lindol. Ang magnitude-7.3 na lindol sa Davao (ipinahiwatig ng diagram ng beachball, na tinatawag ding focal mechanism) ay naganap sa baybayin ng Davao, ang pinakamalaking lungsod sa Mindanao Island. Lokasyon at focal mechanism ng Magnitude 7.2 na lindol sa Bohol noong 15 Oktubre 2013 ay ipinapakita din sa larawan. Kredito: binago mula sa Aurelio et al., 2013

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Isa pang malaking lindol ang tumama sa katimugang bahagi ng Pilipinas

Ang Magnitude-7.3 na lindol na tumama sa baybayin ng Mindanao, Pilipinas, ngayong linggo ay maaaring magdulot ng matinding pinsala kung ang lindol ay mababaw at nasa baybayin. Isinulat nina …

Figura 2. Migración hacia el oeste de la ruptura del terremoto de 2010 y 2021. La figura sugiere la existencia de una brecha de ~15km de largo entre ambos eventos, la cual es candidata, entre muchas otras, a romper en un futuro terremoto. Crédito: Temblor Inc.

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¿Los terremotos de Haití de 2010 y 2021 forman parte de una secuencia progresiva?

Es muy probable que el terremoto de Haití del 2010 haya acelerado la ocurrencia del terremoto del 14 de agosto del 2021. Múltiples observaciones apuntan hacia una migración sísmica en …

Figure 1 Seismotectonics of three moderate-magnitude, thrust-mechanism earthquakes (shown by beachballs) occurring in the same region in Batangas, southern Luzon, Philippines, within a period of three weeks. Initial results of Coulomb stress transfer modeling are also shown. References: Jarvis et al., 2008 for SRTM topography; Weatherall et al., 2020 for bathymetry; Toda et al., 2011 for CST modeling; PHIVOLCS for earthquake data. Credit: Aurelio, Lagmay, Escudero, Catugas

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Philippines fault jolts Batangas again, with magnitude-5.8 quake

A magnitude-5.8 earthquake that occurred off the coast of Batangas in southern Luzon, Philippines, only three weeks after a magnitude-6.6 earthquake struck the same region, is a reminder of the …

图2 逐渐向西破裂的2010年和2021年地震。两个地震之间似乎存在一个长15公里的间隙，是未来可能发生大地震的可能断层之一（图来源：Temblor Inc.）。

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2021年及2010年海地大地震是渐进破裂过程中的一部分吗？

2010 年的海地7.0级地震可能加快了 2021 年 8 月 14 日海地7.2级地震的发生。一些证据显示海地的地震系列正在向西延伸，但海地东部断层的高应力区仍然存在。原文作者：Ross Stein (美国Temblor, Inc., California); Shinji Toda 远田晋次 (日本东北大学); Jian Lin 林间 (中科院南海海洋研究所/南方科技大学/美国伍兹霍尔海洋研究所); Volkan Sevilgen (美国Temblor, Inc., California) 中文翻译：郭宗林（中科院南海海洋研究所）；郭来银（南方科技大学）；周志远（中科院南海海洋研究所） …

Rupture progressive vers l'ouest des séismes de 2010 et 2021. Il semble qu'il y ait un saut ou une brèche de 15 kilomètres de long entre eux, un candidat parmi d'autres pour un futur grand séisme. Crédit: Temblor Inc.

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Les tremblements de terre de 2021 et 2010 en Haïti font-ils partie d’un ordre progressif?

Le tremblement de terre de 2010 en Haïti a probablement rapproché la faille qui s’est rompue, le 14 août 2021 de sa rupture originale. Certains éléments suggèrent une progression du …

図２. エンリキロ断層沿いで西へ進展する2010年，2021年地震．両地震の震源断層の間には10 km程度のギャップ（未破壊区間）があるようにみえる．

Earthquake Insights / Expert Commentary / Publications / Temblor

2010年ハイチ地震（M7.0），2021年ハイチ地震（M7.2）は長大断層の破壊進展過程を示しているのか．

甚大な被害をもたらした2010年のマグニチュード（M）7.0のハイチ地震は2021年８月14日のM7.2地震を促進した可能性が高い．今後も時間差を置いて同様の大地震が２つの震源の西側で起きやすい状況が続くと考えられる．一方で，首都ポルトープランスを含む東側にも伝播した歪みは残っており予断を許さない． By ロス・スタイン（テンブラー社），遠田晋次（東北大学災害科学国際研究所），ジン・リン（南方科技術大学，ウッズホール海洋研究所），ボルカン・セビルゲン（テンブラー社） Citation: Stein, R.S., Toda, S., Lin, J., Sevilgen, V., 2021, Are the 2021 and 2010 Haiti earthquakes part of a progressive sequence?, Temblor, …

Figure 2. Progressive westward rupture of the 2010 and 2021 earthquakes. It appears that there is a 15-kilometer-long jump or gap between them, one candidate among several for a future large earthquake. Credit: Temblor Inc.

Earthquake Insights / Expert Commentary / Publications / Temblor

Are the 2021 and 2010 Haiti earthquakes part of a progressive sequence?

Haiti’s 2010 earthquake likely brought the fault that ruptured in the Aug. 14, 2021 quake closer to failure. Some elements suggest a westward earthquake progression, but highly stressed sections of …

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Category: Expert Commentary