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A geological event caused by shifting tectonic plates, triggered by a sudden release of energy in the Earth's crust that creates seismic waves. Earthquakes are recorded with a seismometer, also known as a seismograph. The moment magnitude (or the related and mostly obsolete Richter magnitude) of an earthquake is conventionally reported. Magnitudes of 3 or lower are mostly imperceptible; magnitudes of 7 or more cause serious damage over large areas. Intensity of shaking is measured on the modified Mercalli scale
Cause of death Direct trauma due to collapse of buildings, dehydration, shock, crush injury
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Following the Bay Area's Loma Prieta Earthquake in 1989 that killed 43 people, the California Department of Transportation had identified 2,200 state bridges and overpasses that needed to be retrofitted.
tsunami (tsoo-NAH-mee): a towering wave, or series of waves, triggered by an underwater earthquake, landslide, or volcanic eruption.
1 An underwater earthquake occurs; seafloor snaps up, lifting the column of water above it.
To see whether past earthquakes had ever pushed volcanoes over the brink, Linde and Sacks scoured global records dating back as far as the 1500s.
2 on the "moment" scale, the Alaska earthquake was the largest to occur in North America since the 8.
A recent poll commissioned by IINC in partnership with Fireman's Fund Insurance Company found that Californians recognize the risks of living in a seismically-active region, but do little to prepare their homes and families in the event of a catastrophic earthquake.
With 2,000 processors connected with miles of optic fiber, the computer allows scientists to unlock the mysteries of an earthquake 40 minutes after it strikes - not just in Southern California, but anywhere in the world.
Which earthquake on the chart registered highest on the Richter scale?
If similar deposits exist along the coast of Papua New Guinea, they could have helped the sediments slip downslope after the initial earthquake, the researchers suggest.
Simply put, we learned that a major earthquake will come, it will knock out the transbay transportation network, and the only way to cross the Bay will be by water," said Ron Cowan, co-chair of the Blue Ribbon Task Force.
The jurors explained to us that they felt there would be some reduction of the association claims because the earthquake was a truly powerful earthquake,'' Richardson said.
The killer quake, along with hundreds of aftershocks (lesser earthquakes in the vicinity), reduced Gujarat's thousands of villages and cities to piles of rubble.