Fault lines

By ICLR | Earthquake-related news from the Institute for Catastrophic Loss Reduction (ICLR).

When an Earthquake Hits Next Door

What would you do if a quake struck two blocks from your home?<p>Most days, it’s easy to forget that coastal California sits at the boundary of two tectonic plates—the Pacific and North American—which are slowly sliding by each other, creating the San Andreas complex of faults. It’s easy to forget …

Earthquakes

How You Could Get an Early Warning for the Next Big Earthquake

At 2:39 am Thursday morning, millions of Bay Area residents from Sacramento to San Jose were shaken awake by the rolling tremble of a 4.4 magnitude …

Earthquakes

L.A. races to fix vulnerable buildings before next major earthquake

When Los Angeles two years ago approved the nation’s most sweeping earthquake retrofitting regulations, officials knew they were in a race against time.<p>The law requires the retrofitting of hundreds of brittle concrete buildings, one of the most vulnerable types of structures in California. But …

Earthquakes

Dispute: Do Magnitude 7-8 mainshocks commonly trigger immediate damaging aftershocks up to 300 km (180 mi) away?

By Ross Stein, Ph.D, Temblor<p>In September 2016, Wenyuan Fan and Peter Shearer, from the Scripps Institution of Oceanography at U.C. San Diego, …

Earthquakes

The Curious Case of the Ultradeep 2015 Ogasawara Earthquake

On 30 May 2015, a powerful earthquake struck west of Japan’s remote Ogasawara (Bonin) island chain, which lies more than 800 kilometers south of …

Earthquakes

Estimating Ground Motions In The Largest Crustal Earthquakes

Earthquakes cause many deaths and injuries worldwide. For example, the 2015 Nepal earthquake is thought to have killed nearly 9,000 people. This …

Earthquakes

Mexico’s deadly earthquakes have increased the chance of another big one, scientist says

This September, two devastating earthquakes struck Mexico in rapid succession. The first, a Sept. 7 magnitude-8.2 temblor near the southern state of Chiapas, killed an estimated 96 people and sent aftershocks shivering through the region. Just 12 days later and a few hundred miles away, a …

Earthquakes

Residual strain despite mega earthquake

On Christmas Day 2016, the earth trembled in southern Chile. In the same region, the strongest earthquake ever measured occurred in 1960. A …

Earthquakes

What would an earthquake-proof city look like?

Earthquakes don’t kill people (generally), collapsing buildings do – meaning it is cities where the most lives can be saved. Here are their smartest ideas so far<p>What would an entirely flood-proof city look like?<p>Between 1994 and 2013, nearly half a million people around the world died due to …

Construction

Huge Earthquakes Change the Strength of Gravity So Fast it Can Tell Us How Bad the Quake Is

When a large earthquake hits, it doesn't just tear apart the Earth's crust and wreak havoc on buildings in the area: The seismic upheaval actually …

New early signals to quantify the magnitude of strong earthquakes

After an earthquake, there is an instantaneous gravitational disturbance that could be recorded before the seismic waves that seismologists can …

Drilling Reawakens Sleeping Faults in Texas, Leads to Earthquakes

Since 2008, Texas, Oklahoma, Kansas and a handful of other states have experienced unprecedented surges of earthquakes. Oklahoma’s rate increased …

Oil and gas industry is causing Texas earthquakes, a 'landmark' study suggests

An unnatural number of earthquakes hit Texas in the past decade, and the region's seismic activity is increasing. In 2008, two earthquakes stronger than magnitude 3 struck the state. Eight years later, 12 did.<p>Natural forces trigger most earthquakes. But humans are causing earthquakes, too, with …

Earthquakes

The real science behind those unreal predictions of major earthquakes in 2018

Rebecca Bendick would like you to not panic.<p>The University of Montana geophysicist knows you may have read the articles warning about "swarms of …

Earthquakes

What If a 9.0-Magnitude Earthquake Hit Seattle?

In preparation for the BIG ONE — the mighty 9.0-magnitude earthquake that's expected to lay waste to the Pacific Northwest — geophysicists have …

Researchers create largest, longest multiphysics earthquake simulation to date

Just before 8:00 a.m. local time on December 26, 2004, people in southeast Asia were starting their days when the third strongest recorded earthquake …

Disaster Geology: 2017's Most Deadly Earthquake

2017's deadliest earthquake (so far) struck Iran at 9:18pm local time on November 12th. As of this writing, 530 people have died in Iran, with a …

Earthquakes caused by industrial activities—what are the risks and how can they be reduced?

On September 3, 2016, a magnitude 5.8 earthquake struck just northwest of Pawnee, Oklahoma, causing moderate to severe damages in buildings near the …

Sloshing of Earth’s core may spike major earthquakes

<b>SEATTLE—</b>The world doesn’t stop spinning. But every so often, it slows down. For decades, scientists have charted tiny fluctuations in the length of …

Geology

Japanese earthquake zone strongly influenced by the effects of friction

The islands of the Japanese archipelago are affected both by frequent, low-magnitude earthquakes and tremors and by larger, highly destructive …

Earthquakes

Earthquake risk elevated with detection of spontaneous tectonic tremor in Anza Gap

Scientists at the University of California, Riverside have detected spontaneous tectonic tremor—a signature of slow earthquakes deep below the …

Earthquakes

Researchers Can Spot Earthquakes Using Fiber Optic Cables

Scientists can use the same cables that bring the internet into your home to expand our earthquake detection networks.<p>Earthquakes are some of our planet's most devastating natural disasters. With almost no warning, an earthquake can level entire cities in a matter of minutes. For the millions of …

50 Ways an Earthquake Could Shatter—or Spare—These Major Northwest Cities

Simulations of the Cascadia Subduction Zone off the Pacific Northwest coast yielded surprises for geologists studying the region’s quake risk.<p>One of the world’s most dangerous earthquake faults lies just 50 miles off the coast of the Pacific Northwest. To find out what might happen when the next …

Earthquakes

UK engineers develop device for earthquake-proofing buildings

<b>UK developed structural engineering technology could protect buildings from the impact of earthquakes or blasts, preventing collapse and reducing the</b> …

Engineering

How will 'Really Big One' earthquake shake out? Researchers run 50 simulations

Such an earthquake along the Cascadia Subduction Zone, which runs from northern California to British Columbia, would cause widespread destruction.

Earthquakes

A Rosetta Stone for Earthquakes

Istanbul, a city of 14 million people and a crossroads of cultural exchange dating back millennia, may also be where Turkey’s next major earthquake …

Outdated Construction Methods Caused Most Building Collapses in Mexico Earthquake, Engineers Say

MEXICO CITY — Warm lighting would enhance the wood floors' natural glow, the developer promised, so when all the custom light bulbs burnt out, Anahi Abadia and her husband grudgingly drove to Home Depot to replenish supplies for their chic new flat in central Mexico City.<p>They had just reached the …

In Mexico City, Pressure to Prepare for the Next Big Earthquake

MEXICO CITY — The buildings shuddered and rocked in the strongest earthquake in this city’s modern history, and yet they remained upright. Then, exactly 32 years later, they crumpled in seconds, killing 228 people.<p>A popular myth had evolved about those buildings that withstood the devastation three …

Earthquakes

Do Earthquakes Have a ‘Tell’?

Data scientists and seismologists could potentially forecast strong earthquakes through algorithms designed to detect and monitor “deep tremor.”

Earthquakes