Fault ‘scratches’ offer clues to rupture direction
Researchers have discovered a pattern in slickenlines — scratches on fault surfaces — that can be used to determine which way a fault ruptured in a past earthquake. By …
Ocean acoustics confirm rising sea temperatures
Researchers devised a way to measure changes in ocean temperature using earthquakes. By mining historical seismic records, researchers got a glimpse of past ocean trends. By Shi En Kim …
M 5.3 in Central Turkey
A M5.3 quake struck Central Turkey this evening. Although the area has been relatively seismically quiet in the last century compared to other parts of the country, strong earthquakes …
M 4.5 in Southern California
A M4.5 shock rattled Southern California last night. Reports of shaking reached San Diego. The epicenter lies just a few miles from that of the damaging 1987 Whittier Narrows …
QuakeLogic
Disclaimer: Temblor does not charge QuakeLogic for this subscription, and makes no money on the sale of QuakeLogic products. About QuakeLogic QuakeLogic Inc. is a software and …
Preparing for an earthquake during a pandemic
COVID-19 infection rates would rise if a large earthquake occurred during the pandemic. Researchers say that the number of resulting new cases depends on whether authorities prepare now. By …
M 4.3 in western Turkey
A M4.3 quake shook western Turkey today. This event lies near the eastern tip of the 1912 M7.4 Ganos earthquake rupture area, a site perhaps brought closer to failure …
Baja quakes highlight seismic risk in northern Mexico
A magnitude-5.1 earthquake that recently occurred in Baja California, Mexico was felt as far as Los Angeles, California. What is the seismic risk imposed by the faults in Baja California? …
M 6.4 quake strikes Davao, Philippines
A M6.4 quake shook the island of Mindanao in the Philippines this evening. The quake struck just offshore. In December of last year, the nearby onshore M6.8 Davao del …
M 6.3 in Chile
A M 6.3 quake struck 40 km northwest of Ovalle, Chile this evening. The strong quake came on the heels of a M 6.8 shock that occurred last week …
M 6.8 in central Chile
A shallow M 6.8 quake rocked central Chile today. Several aftershocks have followed so far. M 7.0+ quakes are common in this region, which sits above the Peru-Chile Trench, …
M 4.5 quake in Jamaica
Some residents in central Jamaica were jolted awake this morning when a M4.5 quake struck the Island. Several faults — mostly strike slip — cut the region and occasionally …
Seismic sensors on the ground record auroras in the sky
A recent study shows that seismometers on the ground are behaving like magnetometers that record auroral activity in Alaska. By Jeng Hann Chong, Cal State University Northridge Citation: …
M 5.3 quake strikes Costa Rican coast
A M 5.3 quake shook the Pacific coast of Costa Rica today and was felt throughout the country. The region has hosted M 7+ quakes in the recent past …
Rural areas may suffer disproportionately in quakes
Location matters: Seismologists studying historical casualty estimates after large earthquakes suggest future rescue efforts should look for rural-area victims. By Melissa L. Weber, MA (@Melwriter) Citation: Weber, M., …
Pair of quakes strikes offshore Sumatra
A pair of earthquakes struck offshore Sumatra today. The first, a M 6.8, was followed by a M 6.9 approximately 6 minutes later. Both quakes likely struck along the …
M 6.6 quake in Samar
A M 6.6 quake struck in Samar, Philippines this morning. Some damage had been reported in nearby areas. The strike slip quake likely originated along a section of the Philippine …
Ground vibrations in the time of coronavirus
The quieting of seismic noise during the coronavirus lockdown may help scientists understand Earth’s natural vibrations. By Elizabeth Goldbaum, Science Writer (@EFGoldbaum) Citation: Goldbaum, E., 2020, Ground vibrations …
Rapid climate change caused Las Vegas fault to shake
A fault that lies beneath north Las Vegas has now been shown to have tectonic origins — with implications for seismic hazards in Las Vegas. New research reveals when and …
M 6.0 offshore Tanzania
Earthquakes are not uncommon in the East African Rift Zone, often originating, as in the case of today’s M6.0 offshore Tanzania, on a secondary branch of the rift. Shaking …
Salton Sea swarm continues
Some 26 hours after the M 4.6, the Bombay Beach seismic swarm continues. But more surprising is that much of the Brawley Seismic Zone, and parts of all the …
Swarm-like earthquake event strikes Southern California
A series of earthquakes have struck in the Salton Sea in Southern California. Events like this have occurred four times in the last 20 years. They are all swarm-like …
Magnitude-5.1 earthquake rattles southeastern U.S.
Yesterday’s magnitude-5.1 quake in western North Carolina was felt throughout the southeastern U.S. Although it came as a shock, a quake of this magnitude is not unexpected. By John …
M 5.1 rattles eastern U.S.
A M 5.1 earthquake rattled parts of the eastern US today. The quake struck outside of Sparta, North Carolina. Moderate magnitude quakes are not rare in this part of …
Some tectonic plates ‘wobble’ before major earthquakes
Scientists are getting new clues about seismic activity before large earthquakes along subduction zones by measuring tectonic wobbles in Japan and Chile. By Chelsea Scott, Ph.D., Assistant Research Scientist, …
M 5.1 aftershock in Puerto Rico
Aftershocks continue off the southern shore of Puerto Rico following a M6.4 quake in January of this year. Today, a M5.1 quake struck offshore, in an area that has …
Honshu quake swarm continues
A M5.4 quake struck off shore Japan yesterday. This quake is part of a continuing swarm of M5.0+ shocks along Honshu that began earlier this year, extending from Tokyo …
Fault geometry plays a role in San Andreas ruptures
Computer simulations help researchers understand the range of possible outcomes of a rupture when key details of the San Andreas Fault are still unknown. By: Shi En Kim (@goes_by_kim) …
Does Alaska’s magnitude-7.8 Simeonof earthquake finally close a seismic gap?
A magnitude-7.8 quake struck near the mostly uninhabited Shumagin Islands on July 22, 2020, potentially closing a large seismic gap along the Aleutian trench. By Elisabeth Nadin, Associate Professor, …
M 4.2 in San Fernando
Today’s M 4.2 quake likely struck on a ‘tear fault’ that connects portions of the 1971 San Fernando earthquake rupture. Today’s event is strike-slip, whereas the 1971 event was …
Hydrated oceanic crust supports benign plate movement at subduction zones
New research suggests that water-rich rocks present along subduction zone boundaries may cause these areas to ‘creep’ along without generating earthquakes. By Melanie Chan, @mellojellochan Citation: Chan, M. …
M 7.8 Aleutian Islands quake
A M 7.8 quake shook the Aleutian Islands this morning. The Alaska earthquake likely occurred along the subduction interface. The Aleutian arc is no stranger to large quakes, having …
M 4.2 in Central Visayas, Philippines
A shallow M 4.2 quake shook Cebu City, Central Visayas on July 17th. The region is at elevated risk of strong shaking, according to Temblor’s models. The M 7.1 …
Ancient rock structures guided rupture pathway in Australian quake
A recent study finds that ancient rock structures in Australia that formed over 500 million years ago determined the pathway of a 2016 earthquake. By Helen Santoro, freelance science …
Ridgecrest earthquakes could cause a San Andreas chain reaction
The 2019 Ridgecrest quakes stressed the Garlock Fault. If it ruptured in a large shock, it would likely trigger a San Andreas earthquake north of Los Angeles. By Ross …
M 5.1 quake in Venezuela
A shallow magnitude-5.1 earthquake struck the Boconó Fault in Venezuela today, and was felt as far away as Caracas. This right-lateral transform fault ruptured in large, damaging earthquakes 6 …
Earthquake swarm in central Idaho
A swarm of earthquakes has shaken central Idaho over the past month, with two M4.0 quakes striking in the past 24 hours. This region has seen large quakes in …
M 5.1 quake in NE Colombia
A M 5.1 quake struck NE Colombia tonight. This quake is likely another event in the “Bucaramanga nest,” one of the highest concentrations of intermediate depth seismicity in the …
Crowdsourcing Earthquake Early Warning Systems
Smartphone usage may provide a global earthquake early warning system through crowdsourced motion detection with the MyShake app. By Melissa L Weber, M.A., freelance science writer (@Melwriter) Citation: …
M 6.6 quake offshore Java
A deep M 6.6 quake struck north of Java today. Shaking was felt throughout the island. The quake was deep enough to lie on the megathrust. Although likely unrelated, …
Subducting plate angle dictates tsunami threat during large earthquakes
Researchers link subducting plate angle to earthquake events that produce larger than normal tsunamis — helpful information for future tsunami risk awareness. By: Danielle Woodring, M.S., structural geologist/science writer …
Tree rings and statistics team up to date earthquakes
A recent paleoseismic study used a new method to identify the timing of past earthquakes that occurred in the Monterey Bay area prior to the 1906 San Francisco earthquake. …
Imaging from 22,000 small earthquakes reveals fault zone intricacies
New high-res 3D images of a fault zone show how fluid movement causes an earthquake swarm. By Julie Pierce Onos (@JuliePierceOnos) Citation: Pierce Onos, J. 2020, Imaging from …
Magnitude-5.9 quake is the latest and largest in Tokyo seismic swarm
Six magnitude-5.0+ shocks have struck greater Tokyo since April 1st, part of a larger swarm that extends north to Hokkaido, at a rate that is about three times higher than …
El temblor de la Crucecita demuestra el riesgo a la ocurrencia de Terremotos en México
Durante esta semana, un terremoto de magnitud 7.4 golpeó la costa del estado de Oaxaca, México. Al igual que eventos previos, este terremoto demuestra la existencia de un complejo sistema …
La Crucecita earthquake illustrates quake risk in México
A magnitude-7.4 quake struck just offshore of Oaxaca, México this week. This and previous quakes highlight complex faulting and remind us of earthquake risk in the area. By Aaron …
M 5.8 near Lone Pine, CA
A M 5.8 quake struck today near the southern end of the Owens Valley Fault Zone. Retrospectively, it appears yesterday’s nearby M 4.6 quake was a foreshock. The damaging …
Oaxaca shaken by M 7.4 quake
Today’s M 7.4 megathrust Oaxaca Earthquake was likely promoted by the deeper 2017 M 8.2 Tehauntepec quake. Here is the forecast Temblor submitted to the Willis Research Network in …
M 5.0 offshore Java
The Yogyakarta region of Indonesia was shaken by a M 5.0 quake at 2:33 am local time. The deep quake struck ~75 km offshore. Parts of Java is at …
M 4.2 near Perry, Oklahoma
A M 4.2 quake hit near Perry, Oklahoma last night. This is not unexpected in this region. Oklahoma has experienced several M 4+ earthquakes per year, including a M …
Temblor Stands with Black Lives Matter
By Ross S. Stein and Volkan Sevilgen Temblor was founded on the principle that everyone, everywhere, should be able to learn their seismic risk. For the safety and financial …
Magnitude-5.9 quake strikes the eastern end of the North Anatolian Fault
By: Haluk Eyidoğan, Ph.D., Professor of Seismology, Istanbul Technical University A moderate earthquake struck the Bingöl province in eastern Turkey on Sunday. The quake occurred at the intersection between …
M 5.9 quake in eastern Turkey
A M 5.9 quake struck eastern Turkey today. The quake occurred near the intersection of the Eastern and Northern Anatolian Faults. A M 6.8 quake occurred nearby in 1949, …
M 5.2 in western India
A M 5.2 quake struck in western India today. The quake appears to be a late aftershock of the M 7.7 Gujarat (Bhuj) earthquake in 2001. This aftershock is …
Five Puget Sound cities likely to feel strong shaking in a megaquake
By: Ian Stone, Ph.D. candidate, University of Washington (@NoisyRocks) Cascadia has experienced major earthquakes in the past. Should another occur today, the region’s cities would feel intense shaking — …
Challenges of earthquake early warning
By: Miguel Neves, Ph.D. Candidate, Georgia Institute of Technology (@Waves2Miguel) A new study examines the challenges of earthquake early warning systems, such as latency, and how to improve the …
M 5.2 in Elâzığ, Turkey
A M 5.2 aftershock struck the Elâzığ region in Eastern Turkey today. The region experienced a damaging M 6.8 quake in January. Today’s quake is just one of several …
M 5.5 Ridgecrest aftershock
Today, the largest aftershock of the 2019 M7.1 Ridgecrest sequence since July 6 struck at the south end of the rupture zone. It’s likely a right-lateral strike-slip earthquake, perhaps …
Apparent earthquake swarm in Delhi area
An apparent seismic swarm is in progress near Delhi. The quakes are not occurring on any known fault, and depths are uncertain. Swarms like this are not typically followed …
Deep M 6.8 quake ENE of Antofagasta
An ~90km deep M6.8 quake struck in Chile today. It seems to have originated on the slab interface, according to the USGS Slab2 model. But, the focal mechanism is …
M 4.7 quake strikes offshore Haiti
A shallow M 4.7 quake struck today on the Septentrional Fault off Cap-Hatien in northern Haiti. Though small, two great quakes likely ruptured the fault in 1842 and 1887. …
M 4.6 earthquake near New Delhi
A M 4.6 quake struck northwest of India’s capital, New Delhi today. The region experienced a widely felt M 3.8 in April. Today’s shock occurred beneath the Delhi-Hardwar ridge, …
Fiber-optic cables help track soil properties, liquefaction potential
By: Shi En Kim (@goes_by_kim) Researchers repurpose underground fiber-optic cables for measuring soil properties in urban areas, which helps scientists determine how the soils — and thus the buildings …
M 5.6 quake and 5.0 aftershock strike New Zealand
Two large earthquakes struck offshore New Zealand over the weekend. The region hosts a number of large faults capable of generating major quakes. The South Island is transected by the …
M6.5 Tonopah event ruptured two faults
The M 6.5 Tonopah event appears to include a main left-lateral rupture on an E-W fault, and a secondary right-lateral rupture on a N-S Fault. This type of sequence, termed …
M5.0 quake in the Philippines
A M5.0 quake struck just off the eastern coast of Luzon in the Philippines at a depth of approx 48 km according to the USGS. The region lies wedged between …
M 4.8 quake rattles Santiago
A widely-felt magnitude-4.8 earthquake ruptured at the southern edge of Santiago today. The event likely struck on the megathrust that lies 90 km beneath Santiago. …
Tonopah quake likely occurred on left-lateral fault
It is beginning to appear that a 20-25 km long left-lateral strike-slip fault, perhaps fully unmapped before the earthquake, is responsible for the 15 May rupture. There is just one …
Implications of the Tonopah magnitude-6.5 earthquake for worldwide seismic hazard assessment
By: Ross S. Stein, Ph.D. (Temblor, Inc., CEO) Shinji Toda, Ph.D. (International Research Institute for Disaster Science, Tohoku University) Volkan Sevilgen, M.Sc. (Temblor, Inc., CTO) The magnitude-6.5 quake provides …
Strong Nevada earthquake felt in San Francisco Bay Area, Bakersfield and Las Vegas
A magnitude-6.5 quake struck a remote part of Nevada today, but was felt in the San Francisco Bay area, Bakersfield, and Las Vegas. Based on its aftershocks and focal mechanism, the event probably struck on an unnamed left-lateral fault, or perhaps the Emigrant Peak Fault.
Seismic hazard increased following 2019 Ridgecrest event
By: Christian Fogerty, Science Writer (@ChristianFoger1) Seismologists used a recently developed model to forecast aftershocks following the recent Ridgecrest earthquake sequence. Their findings revealed a short-term increase in seismic …
Earthquake swarm underway beneath Greater Tokyo
Yesterday’s M5.8 is the latest in a series of M5+ quakes to rattle greater #Tokyo since the beginning of the year. The long-term rate of M5+ quakes within 100 km …
M 5.3 quake in Philippines
Three widely felt earthquakes shook the Philippines today, but it’s unclear if they triggered each other. They appear to have struck on the twin subduction zones that formed the islands. …
M 5.6 quake in Japan
Another quake struck beneath the Tokyo metro region just after 10 pm local time on May 4th. This quake, a M 5.6, is the latest in a swarm that has …
M 3.3 in Los Angeles Metro
A M 3.3 quake rattled parts of the northern Los Angeles metro area last night. The region is at risk of strong shaking, according to Temblor’s models. Los Angeles has …
M 5.3 offshore Puerto Rico
A series of M 4+ aftershocks struck this morning off shore of Puerto Rico, south of Ponce, with the largest being a M 5.3. These quakes follow the M 6.4 …
M 5.0 quake in Indonesia
A M 5.0 earthquake occurred today near the town of Padangsidempuan, Indonesia. Sumatra is transected by the right-lateral Sumatran fault system. Today’s quake occurred within a tectonically complex region …
Pandemic lockdown sensitizes New Delhi to earthquake risk
By: Ramesh P. Singh, Ph.D., School of Life and Environmental Sciences, Chapman University Efficient energy transfer from the epicenter of Sunday’s magnitude-3.8 quake northeast of New Delhi, along with …
Opinion: Volcano observatories reduce risk around the globe. Here’s how we can support them
By: Jacob B. Lowenstern, Ph.D. and John W. Ewert, U.S. Geological Survey Cascades Volcano Observatory Volcano observatories are a critical tool for governments to reduce the impacts of volcanic …
Southern California jolted by moderate but intense quake
By: Deborah Kilb, Ph.D., Project Scientist, Scripps Institution of Oceanography (@Kinect_with_Sci), and Frank Vernon, Ph.D., Researcher, Scripps Institution of Oceanography Over the last 20 years, the Anza area has …
万一大流行期间自然灾害来袭怎么办？
英文链接 英文作者：John C. Mutter博士 哥伦比亚大学地球与环境科学教授以及国际与公共事务教授 英文发表时间：2020年4月1日 翻译：google translate (谷歌翻译) 后期修改: 彭志刚（Zhigang Peng）博士 佐治亚理工地球与大气系教授 考虑到地球自然灾害的发生频率，以及冠状病毒大流行的持续时间，我们几乎无法避免它们同时发生。试想，当某地的疫情已经失控时，突然又发生一次大地震或者大风暴，这时我们该怎么办呢？ 英文引用 ：Mutter, J.C., (2020), What if? What if a natural disaster strikes amid a …
Induced earthquakes can cause as much damage as tectonic quakes
By Laura Fattaruso, M.S., Ph.D. Candidate, UMass Amherst (@labtalk_laura) A recent study finds that ground motions from earthquakes induced by oil and gas operations are similar to those produced …
Opinion: What if? What if a natural disaster strikes amid a pandemic?
By John C. Mutter, Ph.D., Professor of Earth & Environmental Sciences and Professor of International & Public Affairs, Columbia University Given the timescales of the Earth’s natural spasms, and …
Opinion: Catastrophic earthquake, oil rig blowout, fire, storm or pandemic: Thinking about the unthinkable
by John C. Mutter, Ph.D., Professor of Earth & Environmental Sciences and Professor of International & Public Affairs, Columbia University After a catastrophe, whether earthquake or pandemic or anything …
Faults slip slowly in Cascadia
By Noel Bartlow, Ph.D., Assistant Researcher, Berkeley Seismology Laboratory The Cascadia Subduction Zone has occasional large earthquakes and frequent slow-slip events. A new study quantifies how these slow-slip events …
Strong earthquakes on Turkey-Iran border trigger scientific cooperation
By Elisabeth Nadin, Ph.D., Associate Professor, University of Alaska Fairbanks, U.S. Haluk Eyidoğan, Ph.D., Professor of Seismology, Istanbul Technical University, Turkey Ali Moradi, Ph.D., Director of Iranian Seismological Center and …
A new way to find old earthquakes uses organic molecules
By Laura Fattaruso, M.S., Ph.D. Candidate, UMass Amherst (@labtalk_laura) A new study uses organic biomarkers to detect heat produced during large earthquakes. Scientists found several faults off the coast …
Opinion: Will Oregon’s legislature choose resiliency?
By Douglas Toomey, Ph.D., Professor, University of Oregon Despite full knowledge of the risks the Cascadia Subduction Zone poses, Oregon’s legislature has been unable to fund hazard mitigation activities. …
![In the San Francisco Bay Area, the Bay Area Rapid Transport System, or BART, will automatically brake its trains when an earthquake is detected, according to the Incorporated Research Institutions for Seismology (IRIS). Photo Credit: Pi.1415926535 [CC BY-SA 3.0]](https://static.temblor.net/wp-content/uploads/2020/02/BART-300x150.jpg)
How good is earthquake early warning?
By Elisabeth Nadin, Ph.D., Associate Professor, University of Alaska Fairbanks New research reveals that Earthquake Early Warning networks provide a timely warning of impending shaking more often than not. …
Response and initial scientific findings from the southwestern Puerto Rico 2020 Seismic Sequence
By Alberto M López, Ph.D., K. Stephen Hughes, Ph.D. and Thomas R. Hudgins, Department of Geology, University of Puerto Rico – Mayaguez Campus Elizabeth Vanacore, Ph.D. and Gisela Báez-Sánchez, B.S., …
Triumphs, Conundrums, and Debates in Earthquake Forecasting and Seismic Hazards
By Ross S. Stein, Ph.D., Temblor CEO Citation: Ross S. Stein (2019), Triumphs, Conundrums, and Debates in Earthquake Forecasting and Seismic Hazards, Temblor, http://doi.org/10.32858/temblor.062 At the American Geophysical …
Terremoto cortical más grande de los últimos 20 años en Colombia golpea en Navidad.
Por Albert Leonardo Aguilar Suarez, Ph.D. candidate, Stanford University, y Ross S. Stein, Ph.D., Temblor, Inc. Evacuaciones en Bogotá y la suspensión de sistemas de transporte siguieron al sismo …
Largest Colombian crustal earthquake in 20 years strikes on Christmas Eve
Evacuations in Bogotá and the suspension of transportation systems followed a magnitude-6.2 earthquake, which struck on or near where the North Andean Block grinds against South American Plate. The mainshock was followed just 15 minutes later by a magnitude-5.7 aftershock. Further large aftershocks remain a possibility
Can scientists forecast human-induced earthquakes?
Aiming to make energy production safer, scientists developed a new model for forecasting earthquakes caused by oil and gas operations in the central U.S.
Albania earthquake strikes highest-hazard zone in the Balkans, devastating nearby towns
As of today, some 24 people are dead and 650 injured, and many more are unaccounted for in collapsed concrete buildings on the coastal plains surrounding the epicenter. The quake likely struck on a ‘blind thrust fault’ that does not reach the Earth’s surface but had nevertheless been previously identified by geologists.
California Earthquake Early Warning tested by moderate Bay Area earthquakes
Warnings were issued for the magnitude-4.5 and magnitude-4.7 quakes 5-6 seconds after they ruptured via ShakeAlert, and alerts reached beta testers of the MyShake app about 2 seconds later. While important progress, these intrinsic delays mean that those who experienced strong shaking received no warning. Alert delays may be longer as the number of alert recipients grows.
Opinion: Fate and denial: The Fukushima reactor 3, and the L’Aquila earthquake 7
The recent acquittal of the TEPCO executives in the Fukushima power plant tragedy hearkens back to the trial of the Italian seismologists who were charged with negligence after the L’Aquila, Italy, earthquakes. Both events raise the question: How much do you prepare for the most dreadful disasters, which result from truly large or rare paroxysms of the Earth?
Forecasting aftershocks: Back to square one after a Deep Learning anticlimax
A 2018 study published in Nature by Phoebe DeVries and her colleagues at Harvard and Google claimed that Deep Learning was able to predict the locations of aftershocks with accuracies far greater than Coulomb stress transfer could achieve
Magnitude 4.5 Pleasant Hill earthquake felt throughout the S.F. Bay area and into the Central Valley
Last night, nearly everyone in the greater Bay area was awakened at 10:30 pm by a Magnitude 4.5 shock near the town of Pleasant Hill, north of Walnut Creek
Earthquake size is not foretold in the first second of rupture, study finds, shortening warning times
A new comprehensive study of almost 100,000 earthquakes in Japan suggest that large or small, quakes look alike in the first 0.2 seconds