By David Jacobson, Temblor See earthquakes in Taiwan 当地时间5月24日下午9点10分， 台湾西南地区人口超过25万的嘉义县附近发生里氏规模5.0级地震。值得注意的是，在地震发生前，该地区已连续发生了5起前震，其中第一起和最后一起前震，规模均为里氏3.6级 ，分别发生于主震前约33小时及主震前5分钟。大多数地震在发生前并不会有前震，因而此次地震前一系列前震的发生是较为罕见的。据台湾中央气象局报告，当地有明显震感，不过目前尚未传出灾情报告。一般而言，规模5.0 的地震能够摇晃建筑物并对建筑物造成一定损害，因而震中附近可能会遭受轻微损伤。 如果我们接获任何灾情讯息，我们将及时更新本文。 目前关于震中位置的测定还存在分歧。美国地震局（USGS）将震中定位于 九芎坑断层（Chiuchiungkeng ）和 木屐寮-六甲断层（Muchiliao-Liuchia） 断层交汇处。欧洲地中海地震中心（EMSC）将震中定于九芎坑断层断层东部。在上面的地震图中可以看到USGS和EMSC所定的震中位置的区别。美国地震局发布的震源机制显示断层的滑移包含走滑和伸张的成分,但这和当地的地质构造并不相符。我们将更新此文一旦台湾中央气象局发布该地震的震源机制。 从本次地震发生的位置上判断，这次地震极有可能是和九芎坑断层相关。九芎坑断层位于台湾西南山麓，是一个逆冲断层。九芎坑断层的快速滑移速率经常被认为提高了该地区发生大地震的可能性。台湾地震模型证实了这一观点（见下图）。台湾地震模型预测了未来50年内台湾地区发生强烈震感的可能性。 除了台湾地震模型外，我们还采用了全球地震活动水平模型（GEAR）去探索该地区未来可能发生的地震震级。该模型利用自1977年来的全球应变速率及地震活动数据预测全球任何地区在你我有生之年可能发生的地震震级。从下图可见，该地区未来有可能发生里氏规模7.5级地震。由于该地区是台湾主要的农业基地，一个规模7.5级的地震将会造成极大的经济损失，从而对整个台湾造成灾难性的影响。如果此次地震震中及震源机制的测定有所变化，我们将相应地更新此文。
Today’s M=5.0 earthquake in Taiwan was preceded by 5 foreshocks.
While the San Andreas shows almost not signs of seismic activity in Northern California, two of its sister faults show significant seismicity.
The recent seismic swarm took place beneath the Seattle Fault Zone, which is susceptible to large, damaging earthquake.
Los terremotos del día de ayer ocurrieron en una parte altamente activa del Golfo de California, donde existe una ruptura más rápida que en otras partes del Golfo.
Yesterday’s earthquakes occurred in a highly active part of the Gulf of California where there is more rapid rupture than other parts of the Gulf.
The M=5.8 earthquake on Saturday caused up to 70% damage in 14 villages.
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Today’s M=6.2 earthquake offshore of El Salvador caused light shaking in the capital city of San Salvador.
Today’s M=5.4 earthquake in western China occurred on a spectacular normal fault in the Tashkurgen Valley.
The recent earthquakes along the Aleutian Islands in Alaska have occurred in an area susceptible to M=7.5 quakes.
By David Jacobson, Temblor Click here for English version See earthquakes in Peru A las 3:08 a.m. tiempo local, golpeó un terremoto de M=5.4 en el norte de Perú …
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Today’s M=5.8 earthquake in Tajikistan is likely an aftershock of a M=5.9 quake two days ago.
Heavy rainfall in the Midwest reached such levels that levees were overtopped and breached, leading to even more flooding.
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Recent flooding in the Midwest illustrates how areas at risk of flooding are not covered in the FEMA flood mapping program.
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Last night’s M=3.1 earthquake was widely felt in both Santa Monica and West Los Angeles.
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A M=6.2 earthquake at 4:31 a.m. local time was followed by a M=6.3 less than two hours later.
Today’s M=6.8 earthquake occurred in a region that has seen 4 other M=6.6+ earthquake in the last 90 years.
Due to earthquakes in 2010, 2015, and a swarm in the last week, a M=8.3 earthquake is more likely to strike offshore of Chile.
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A M=6.9 earthquake offshore of Chile, near the cities of Valparaiso and Santiago follows an intense seismic swarm that started two days ago.
Santiago, la capital de Chile, se encuentra a otros 100 km (60 millas) tierra adentro, donde se sintió más ampliamente el sismo más grande.
A series of eight M~5 shocks has just occurred on or near the megathrust surface 30 km (18 mi) offshore the major port city of Valparaiso, Chile.
Türkiye’nin batısında, 5 büyüklüğünde iki deprem birbiri ardına bir saat içinde hissedildi.
By David Jacobson, Temblor See earthquakes in Peru El día de ayer, a las 12:49 p.m., hora local, un terremoto de M=6.0 sacudió el norte de Perú y se …
The location of yesterday’s M=3.7 earthquake was within the Geysers Geothermal Field, which is the site of numerous induced earthquakes.
Saturday’s M=5.9 was felt 100 km north of the epicenter in the capital city of Manila, which is home to over 1.5 million people.
A bill passed by the House of Representatives would allocate funding towards an earthquake early warning system for the Pacific Northwest.
Had today’s M=6.1 quake been underneath a populated center, the effects could have been much worse.
Team Temblor took a trip to the Hayward Fault with USGS paleoseismologist David Schwartz.
By Ross Stein and David Jacobson, Temblor Check your flood risk Click here for english version Al final de la semana pasada, lluvias torrenciales en Colombia terminaron en deslizamientos …
The flooding in Colombia over the weekend was likely influenced by active faulting in the Colombian Andes.
This morning’s earthquake occurred at a transitional point between the Santa Cruz Mountains and creeping sections of the San Andreas Fault.
Yesterday’s M=5.7 quake in the Gulf of California occurred in an area where tectonic forces are causing Baja California to move farther from mainland Mexico.
Learn about the process of seismically retrofitting your house
Displaced coral appears to suggest enormous waves in the Caribbean prior to Columbus
California is considering leaving the National Flood Insurance Program in favor of a state-run program.
A feature on the process of retrofitting your home
A new model aims to incorporate all hazards posed by subduction zone earthquakes into a single tool.
Last night’s earthquake could be an aftershock of the September 16, 2015 M=8.3 Illapel quake.
The move was made to keep the Aliso Canyon natural gas storage facility closed
The Newport-Inglewood and Rose Canyon faults, believed to be separate systems, are now shown to be one system capable of rupturing in M=7.3+ earthquakes.
Yesterday’s M=4.3 earthquake was felt in Zurich, which is home to nearly 400,000 people.
Yesterday’s earthquake took place in a region which has seen 13 M=7.5 earthquakes since 1900.
The Pawnee Nation is suing oil companies over their role in the September 3, 2016 M=5.8 Pawnee earthquake
New evidence for 10 ground-rupturing earthquakes was discovered in Southern California along the Big Bend section of the San Andreas Fault.
When induced earthquakes are included, the seismic hazard for 2017 in Oklahoma is as high or higher than most places in California.
Scientists remain divided as to whether there is a clear correlation between heavy rainfall and increased seismicity
Submarine landslides during the November 2016 Kaikoura, New Zealand earthquake wiped out a hotbed of sea life.
Last night’s earthquake was located in a region on the Cascadia Subduction Zone currently undergoing a slow slip event.
Flooding in San Jose has forced the evacuations of thousands of residents, with no timetable on when they will be allowed home.
A $4.8 billion project to protect the Bay Area’s water resources is approximately 91% finished.
Fluctuations in water levels at Lake Oroville are known have caused earthquakes. In 1975, a M=5.8 shook the area.
Tomorrow, Santa Monica will look to enact the nation’s most extensive retrofitting initiative.
Seismic activity around Edremit Fault Zone in the western Turkey should be monitored closely
Today’s M=3.4 earthquake in the San Bernardino Mountains occurred along a segment of the San Andreas Fault.
Today’s M=6.3 earthquake struck just 85 km northeast of a M=8.0 quake in 1945
In recent days, increased seismicity around Lake Berryessa highlights a large hazard to the region.
In the last month, there have been seven M=3+ earthquakes in and around the greater Yellowstone region.
A recent study indicates that California homeowners lack a comprehensive understanding of how to protect themselves from earthquake damage.
Until February 27, you may be eligible to apply for a $3,000 grant to seismically retrofit your home.
Nearly 2 years after the Nepal earthquake, a team will be sent to Mt. Everest to see if the quake caused the world’s tallest mountain to shrink.
When most people think of drones, they think of privacy issues and hobbyists that get in the way. However, as technology continually improves scientists are now using drones to save lives.
The San Francisco Seawall was a key factor in turning San Francisco into the extremely prosperous city it is today. However, it is at risk from a serious threat, earthquakes.
Perhaps the most remarkable feature of yesterday’s Mw=7.9 mainshock was the occurrence of a M=5.6 earthquake 180 km (110 mi) to the southwest of the mainshock, just 15 minutes after the mainshock struck.
Recent findings show that the state of Washington lags far behind California, Oregon, and British Columbia in its earthquake preparedness
At 11:14 a.m. local time, a M=5.7 earthquake shook the already devastated city of Amatrice, Italy, and was followed 11 minutes later by a M=5.6 quake.
The Christmas quake was extremely fast out of the gate, but ran out of gas within 8 seconds, coasting to a stop just 10 seconds later. This saved Chile from suffering a giant quake, but is nevertheless troubling news for Earthquake Early Warning systems.
El terremoto durante la Navidad tuvo un inicio extremadamente rápido, pero perdió su fuerza durante los primeros 8 segundos, deteniéndose justo 10 segundos después. Esto salvó a Chile de sufrir un terremoto inmenso, pero, sin embargo, es una noticia preocupante para los sistemas de Advertencia Sísmica Temprana.
At 4:08 a.m. local time, a M=5.9 earthquake shook Cuba, including the cities of Guantanamo and Santiago de Cuba.
Faults for much of northwest South America are now visible on Temblor
Scientists are now using sports to prepare for large earthquakes
According to year-end data from the Oklahoma Corporation Commission, there was a 23% drop from 2015 to 2016 in the amount of wastewater injected into the region’s areas of interest for triggered seismicity.
Faults spanning Europe, the Middle East, Southeast Asia, Japan, Taiwan, and New Zealand have just been added to Temblor.
Drone footage released yesterday by Italy’s fire service has revealed images of the small town of Amatrice, which was severely damaged in the 24 August 2016 M=6.2 earthquake.
A new finding by Janet Watt and her USGS coauthors appeared this month in Science Advances, heralding a “Missing link between the Hayward and Rodgers Creek faults.”
Why have there been so many large earthquakes in Ecuador so close together in time? A team of geophysicists aims to answer that question.
A M=7.0 earthquake shook off the coast of Fiji yesterday, and possibly triggered a remote aftershock over 1,000 km away.
Over the last several days, a seismic swarm has been taking place on the Brawley Seismic Zone which is the southernmost extent of the San Andreas Fault.
There is a clear need to densify the Nevada Network, and to install telemetry at all stations.
Almost anywhere else in the world, a M=7.7 earthquake would be considered large and rare, but today’s shock is exceptional
In last month’s M=7.8 Kaikoura, New Zealand earthquake, at least 9 separate faults ruptured in the largest quake in New Zealand since the 1855 M=8.2-8.3 Wairarapa earthquake.
The European Space Agency (ESA) recently released new satellite imagery, that reveals which parts of the Bay Area are subsiding and those that are being uplifted.
This most recent Mw 6.9 extensional event was actually caused by the Tohoku earthquake which happened over 5 years ago.
At approximately 6 a.m. local time on Tuesday November 22, a M=6.9 earthquake shook the eastern coast of Japan’s Fukushima Prefecture, and caused a tsunami warning to be issued.
GNS Science just released drone footage of fault rupture along the Kekerengu and Papatea faults.
At 12:02 a.m. local time, a Mw=7.8 (per USGS), Mw=7.5 (per GNS Science, NZ) earthquake struck New Zealand’s South Island, and caused tsunami warnings to be issued for all of New Zealand’s east coast.
Imagine a 40-foot high wall of water. There’s nothing you can do to stop it, you don’t have time to grab possessions, all you can do is run.
At 12:20 pm local time Friday afternoon, a magnitude 6.4 earthquake hit 25 km ESE of Curico, Chile.
Ross Stein was on the BBC’s Science in Action podcast yesterday with Roland Pease to discuss the recent earthquakes in Italy.
In our judgment, the Norcia, Gorzano, Capitignano Faults could now be the next domino pieces to fall.
A M=5.5 shock preceded the M=6.1 earthquake by little over 2 hours, and so might be deemed a foreshock. After the Amatrice earthquake, the INGV posted a calculation of the stress transferred from the M=6.2 to surrounding faults.
It is likely that earthquakes in 1943 and 2000 contributed stress that brought the fault which ruptured today, closer to failure.
October 20th marks the 9th official Great ShakeOut earthquake drill.