Big Earthquakes Are Not Linked
13 years, 11 months ago

Big Earthquakes Are Not Linked

Wired  

Big earthquakes like the Sendai quake that devastated Japan in March don’t cause similar disasters on the other side of the globe, a new study suggests. Like ranks of falling dominoes, tremors on the scale of the Sendai quake can trigger other earthquakes, say geophysicists at the U.S. Geological Survey in Menlo Park, California But, based on analyses of about 30 years of seismic data, those shocks are all very small or sit close to the original fault break, the group reports online March 27 in Nature Geoscience. “If California is ready to go, it’s because California is ready to go,” says Jian Lin, a geophysicist at the Woods Hole Oceanographic Institute in Massachusetts. “But it’s not a surprising result to an earthquake scientist like myself.” How shaking could trigger tiny faults but not big ones remains unclear, Lin says.

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History of this topic

Magnitude 6.8 earthquake rattles southwestern Japan, followed by tsunami warnings
2 months, 1 week ago

Magnitude 6.8 earthquake rattles southwestern Japan, followed by tsunami warnings

New Indian Express  

TOKYO: A 6.8-magnitude earthquake struck southwestern Japan late on Monday, causing two small tsunamis in the area but no damage reported. Local media reported no immediate injuries, with live television feeds from the region on public broadcaster NHK showing no visible damage as well as calm seas, vessels operating and traffic running normally. Sitting on top of four major tectonic …

Experts warn a mega quake will trigger a devastating 100ft-high tsunami, cause carnage for seven million people and destroy 140,000 square miles. Here they share the key actions needed to improve your
3 months, 2 weeks ago

Experts warn a mega quake will trigger a devastating 100ft-high tsunami, cause carnage for seven million people and destroy 140,000 square miles. Here they share the key actions needed to improve your

Daily Mail  

Not far off the coast of the Pacific Northwest, a crack exists in the Earth’s crust. For this is the ‘Big One’ – the long-anticipated earthquake that could one day bring devastation to the continent. At a magnitude 9, it’s been predicted the eruption of the Cascadia Subduction Zone – a so-called megaquake – could kill 14,000 people and severely …

In California’s ‘earthquake country,’ a 7.0 temblor prompts confusion and a tsunami warning
3 months, 2 weeks ago

In California’s ‘earthquake country,’ a 7.0 temblor prompts confusion and a tsunami warning

Associated Press  

SAN FRANCISCO — Valerie Starkey was driving through Northern California to visit relatives when she suddenly felt shaking and feared her car had broken down, only to realize later that it was an earthquake so powerful that it triggered a tsunami warning for hundreds of miles of the U.S. West Coast. The epicenter of Thursday’s 7.0 magnitude shaker occurred in …

How little-known fault lines could trigger next major earthquake in US
5 months, 1 week ago

How little-known fault lines could trigger next major earthquake in US

Daily Mail  

Major faults like the San Andreas strike fear of producing devastating earthquakes. 'All these mangy wannabe faults that we pretty much ignore as candidates for big earthquakes actually could be very important,' Ross Stein, earthquake researcher and CEO of Tremblor, an earthquake-risk assessment app, told SciTechDaily. Stein and his co-author, professor emeritus Peter Bird of the University of California, Los …

A powerful quake hits off Japan’s coast, causing minor injuries but prompting new concerns
7 months, 2 weeks ago

A powerful quake hits off Japan’s coast, causing minor injuries but prompting new concerns

LA Times  

People stand outside a building following an earthquake in Miyazaki, western Japan, on Thursday. A powerful earthquake struck off southern Japan on Thursday, causing mostly minor injuries but raising the level of concern over possible major quakes stemming from an undersea trough east of the coast. Officials said nine people were injured on Japan’s southern main island of Kyushu, but …

String of earthquakes rattles L.A.: Are they telling us something bigger?
9 months, 1 week ago

String of earthquakes rattles L.A.: Are they telling us something bigger?

LA Times  

Southern California was recently rattled by several small earthquakes. Having half a dozen earthquakes with a magnitude over 2.5 in a week, hitting three distinct parts of Southern California, all in highly populated areas, is not a common occurrence. But experts say these smaller quakes have no predictive power over the next major, destructive earthquake in urban Southern California, the …

Small earthquakes mount in Newport Beach-Costa Mesa area
9 months, 2 weeks ago

Small earthquakes mount in Newport Beach-Costa Mesa area

LA Times  

The first earthquake Thursday was at 4:52 p.m., occurred along the Newport Beach-Costa Mesa border. A trio of Southern California earthquakes have struck in the area of Newport Beach and Costa Mesa in the last two days, with a pair rumbling late Thursday afternoon. The first earthquake Thursday, at 4:52 p.m., occurred along the Newport Beach-Costa Mesa border. That was …

Rare magnitude 4.8 earthquake rattles New Jersey and New York, is felt across Northeast
11 months, 2 weeks ago

Rare magnitude 4.8 earthquake rattles New Jersey and New York, is felt across Northeast

LA Times  

A rare magnitude 4.8 earthquake rattled New Jersey on Friday, shaking buildings in Manhattan and sending tremors across the Northeast United States, a region unfamiliar with much seismic activity. Its epicenter was less than 1 mile northwest of the unincorporated community of Oldwick, N.J. Weak shaking was felt from Washington, D.C., to Maine, including in Boston, Philadelphia and Albany, N.Y. …

Taiwan’s massive earthquake could happen in California. What we can learn from it
11 months, 2 weeks ago

Taiwan’s massive earthquake could happen in California. What we can learn from it

LA Times  

A damaged building collapsed next to a local hotel following the earthquake in Hualien, Taiwan on Thursday. “One thing that’s important to pay attention to is that there are still buildings that have not been retrofit,” said Patti Harburg-Petrich, a structural engineer. “One thing we can take away as a community from this earthquake is the importance of investing in …

Nearly 50 killed, thousands evacuated as 155 earthquakes jolt Japan on New Year's Day
1 year, 2 months ago

Nearly 50 killed, thousands evacuated as 155 earthquakes jolt Japan on New Year's Day

India Today  

Nearly 50 people have died after a series of strong earthquakes jolted Japan on the first day of 2024, even as authorities struggled to evaluate the magnitude of the disaster. Since Monday, the island nation has been hit by as many as 155 earthquakes, including an initial 7.6 magnitude jolt and another more than 6, the Japan Meteorological Office said. …

How earthquakes happen: The science of a shake
3 years, 9 months ago

How earthquakes happen: The science of a shake

LA Times  

To prepare for the Big One, it will help to know exactly what an earthquake is. It isn’t until there is a quake that is larger than the previous ones that the initial episodes get “demoted” to foreshocks and the main shock is identified, Yule said. “The fault will have its earthquake, and it’ll have gotten rid of some of …

Surprising tsunami triggers may lurk off California’s coast, scientists say
3 years, 10 months ago

Surprising tsunami triggers may lurk off California’s coast, scientists say

LA Times  

The clear water of Marin County’s Tomales Bay, whose shape and proximity to the San Andreas fault might make it more vulnerable to tsunamis than scientists previously realized. Quakes along strike-slip faults like the San Andreas, in which two plates slide past one another, weren’t thought to cause tsunamis on their own because they cause largely horizontal motion. At this …

US researchers develop new explanation for destructive earthquakes
5 years ago

US researchers develop new explanation for destructive earthquakes

India TV News  

Geophysicists at Brown University have a new explanation for how those high-frequency vibrations of earthquakes may be produced, according to a new study published Tuesday. In the paper published in Geophysical Research Letters, Brown faculty members Victor Tsai and Greg Hirth propose that rocks colliding inside a fault zone as an earthquake happens are the main generators of high-frequency vibrations. …

3,000 earthquakes since July 4, and more big ones likely coming
5 years, 8 months ago

3,000 earthquakes since July 4, and more big ones likely coming

LA Times  

Seismologists Robert Graves and Lucy Jones speak at a news conference at Caltech in Pasadena in response to the 6.4 magnitude earthquake that struck near Ridgecrest, Calif. Seismologists Robert Graves and Lucy Jones speak at a news conference at Caltech in Pasadena in response to the 6.4 magnitude earthquake that struck near Ridgecrest, Calif. Lucy Jones explains the nature of …

We could see twice as many big earthquakes this year, scientists warn - because the equator has shrunk
7 years, 2 months ago

We could see twice as many big earthquakes this year, scientists warn - because the equator has shrunk

The Independent  

For free real time breaking news alerts sent straight to your inbox sign up to our breaking news emails Sign up to our free breaking news emails Sign up to our free breaking news emails SIGN UP I would like to be emailed about offers, events and updates from The Independent. Roger Bilham and Rebecca Bendick warn that the Earth's …

Earthquakes in the 'Ring of Fire' terrorising the Pacific
7 years, 6 months ago

Earthquakes in the 'Ring of Fire' terrorising the Pacific

Daily Mail  

A series of big earthquakes in less than 24 hours could have been caused by seismic waves travelling along fault lines and triggering ruptures. Earthquakes in New Zealand, Japan, Vanuatu, Indonesia, Tonga, Taiwan, and Papua New Guinea over past 24 hours could be caused by seismic waves travelling along fault lines Reports from GeoNet showed the second quake being felt …

The Big One earthquake could sink huge parts of California
8 years ago

The Big One earthquake could sink huge parts of California

Daily Mail  

The Big One may be overdue to hit California, but scientists near LA have found a new risk for the area during a major earthquake. Scientists from California State University Fullerton and the United States Geological Survey found evidence the older quakes have caused the land to fall by three feet WHAT IT MEANS An event along the same lines …

Big earthquakes can produce destructive temblors on nearby faults, new study finds
8 years, 6 months ago

Big earthquakes can produce destructive temblors on nearby faults, new study finds

LA Times  

UC San Diego has found evidence that large earthquakes can quickly produce powerful and potentially dangerous aftershocks on nearby faults, an insight that could aid experts planning for how to deal with seismic hazards in California. In addition, the team from UC San Diego’s Scripps Institution of Oceanography made note of a 7.0 earthquake in the Indian Ocean that generated …

Watch what ‘The Big One’ on the San Andreas fault would feel like
8 years, 10 months ago

Watch what ‘The Big One’ on the San Andreas fault would feel like

LA Times  

A top seismology expert this week reminded Southern California that a major earthquake on the southern San Andreas fault is long overdue. A magnitude-8 earthquake striking the southern San Andreas fault would cause massive shaking across a wide swath of Southern California from Monterey County to beyond the Mexican border. Scientists with the Southern California Earthquake Center produced a video …

Is 4.4 jolt an end to Los Angeles’ ‘earthquake drought’?
11 years ago

Is 4.4 jolt an end to Los Angeles’ ‘earthquake drought’?

LA Times  

This post had been corrected. Seismologists say Monday’s magnitude 4.4 temblor near Westwood could mark the beginning of the end for L.A.’s years-long “earthquake drought.” Typically, they would expect a 4.4-sized earthquake about once a year in the Los Angeles Basin, but that hasn’t happened for years. “We don’t know if this is the end of the earthquake drought we’ve …

Experts warn of massive quakes in Himalayas
12 years, 2 months ago

Experts warn of massive quakes in Himalayas

India TV News  

Singapore, Dec 31: In what can have huge implications for countries like India, scientists have warned of massive earthquakes of the magnitude 8 to 8.5 on the Richter scale in the Himalayas, especially in areas with their surface yet to be broken by a temblor. A research team led by Nanyang Technological University in Singapore has discovered that powerful earthquakes …

Japan Quake Unleashed 336 Megatons Of Energy
14 years ago

Japan Quake Unleashed 336 Megatons Of Energy

India TV News  

Ahmedabad, March 13 : The 8.9 magnitude earthquake that shook Japan on Friday released energy equivalent to 336 megatons of TNT explosive, says a media report. This earthquake is also the seventh largest in the known history of the earthquakes, says Dr J G Negi, founder director general, Institute of Seismological Research, Gandhinagar.He said that Japanese coast had tsunami waves …

Tracking The Geologic Impacts Of Earthquakes
15 years ago

Tracking The Geologic Impacts Of Earthquakes

NPR  

Tracking The Geologic Impacts Of Earthquakes The earthquake that shook Chile last weekend was powerful enough to push up the Andes a few feet, shift Earth's axis and even speed up the planet’s spin. Mr. STEIN: That's right, and so in this earthquake we calculate that the coastline of Chile for three, 400 miles was uplifted several feet during this …

Mega-quakes rare but can occur anywhere › News in Science (ABC Science)
17 years ago

Mega-quakes rare but can occur anywhere › News in Science (ABC Science)

ABC  

News in Science Mega-quakes rare but can occur anywhere We can expect an average three catastrophic, magnitude 9 or greater earthquakes around the world each century, according to a new study. "The Sumatra-Andaman earthquake happened in one of the least likely places," says seismologist Dr Robert McCaffrey of New Zealand's government research agency GNS Science. As for why McCaffrey's model …

DEVASTATING JOLT IN JAPAN : Danger Zone Lies Beneath Japan : Geology: Quake experts say the convergence of four enormous tectonic plates makes area the world’s ‘messiest.’
30 years, 2 months ago

DEVASTATING JOLT IN JAPAN : Danger Zone Lies Beneath Japan : Geology: Quake experts say the convergence of four enormous tectonic plates makes area the world’s ‘messiest.’

LA Times  

TIMES STAFF WRITERS Japan’s worst earthquake in almost 50 years came near the crush zone of four continent-sized pieces of the Earth’s surface, where the underlying faults are even more complicated and potentially hazardous than in Southern California. While California and Japan may share the ultimate source of their seismic uncertainty, their respective earthquake experts have chosen markedly different approaches …

Scientists lost in a tangle of fault lines
31 years, 2 months ago

Scientists lost in a tangle of fault lines

The Independent  

For free real time breaking news alerts sent straight to your inbox sign up to our breaking news emails Sign up to our free breaking news emails Sign up to our free breaking news emails SIGN UP I would like to be emailed about offers, events and updates from The Independent. They are trying to assess whether ground movements have …

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