Category: Earthquake Insights

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 …

Yesterday’s M=6.0 earthquake likely occurred on a blind thrust fault deep in the Amazon Rainforest.

The location of yesterday’s M=3.7 earthquake was within the Geysers Geothermal Field, which is the site of numerous induced earthquakes.

This morning’s M=5.6 earthquake was widely felt over the Lesser Antilles.

This earthquake struck only 4 days after a M=5.9 rattled the northern part of the Philippines.

The 2016 New Zealand earthquake broke all our rules

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.

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.

Today’s M=6.6 earthquake shook one of the most seismically active regions on earth.

The Mendocino Triple Junction is one of the most seismically active regions on earth, while the Northern San Andreas is extremely quiet.

While most people think of volcanoes when they think Hawaii, the region is also very seismically active.

Anderson Dam south of San Jose is at risk of failure in a large earthquake

Displaced coral appears to suggest enormous waves in the Caribbean prior to Columbus

Yesterday’s small earthquakes highlight a hazard posed to California’s Great Valley.

Scientists in New Zealand believe last year’s Kaikoura earthquake may be the most complex fault rupture ever recorded.

Last nights quake did not occur on the San Andreas, but rather on the highly active San Jacinto Fault

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.

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.

A $4.8 billion project to protect the Bay Area’s water resources is approximately 91% finished.

Unstable soil both upstream and downstream of Anderson Dam have led to concerns over how the it would perform in an earthquake.

In a report released yesterday, the City Club of Portland outlined various steps that should be taken to ensure that the city can quickly bounce back following a large earthquake.

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.

The USGS is asking for volunteers to place a small seismograph in their home or business to assist with a new ground motion study.

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.

Yesterday’s M=3.5 quake occurred in a region of fault creep near the San Andreas and Calaveras faults

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

As many as 30 people are feared missing following a large avalanche in Central Italy

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.

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.

Thursday’s M=6.5 earthquake should have increased the stress on the Mendocino Fault Zone west and east of the rupture zone. These stress increases nominally would have the potential to trigger more earthquakes.

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.

The 14 November 2016 M=7.8 New Zealand earthquake caused significant damage, and left many people isolated. Images now coming in show the scale of the devastation.

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.

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.

The one-week California Earthquake Advisory ended, following a week of increased seismicity near the southern portion of the San Andreas Fault.

The California Office of Emergency Services (CalOES) issued an advisory stating the recent earthquake swam may have slightly increased the probability of additional earthquakes over the next week.

In April, Kumamoto, Japan was devastated by a series of large earthquakes. Now, Google Earth has updated 3D imagery, revealing the extent of damage.

At 7:31 a.m. local time, a M=4.3 earthquake shook the southern section of the San Andreas Fault, within the Brawley Seismic Zone.

A M=3.5 earthquake on the Hayward Fault shook the East Bay and Peninsula at 12:50 a.m. local time.