The magnitude of the earthquake and its shallow depth -- 15.2 miles (24.5 kilometers) -- created a lot of energy, said Shenza Chen of the U.S. Geological Survey.
By their reckoning, there was a 99% chance of an earthquake of magnitude 8.0 occurring off the Miyagi coast, and a 90% chance of one off Ibaraki prefecture, within the next 30 years.
Dozens of schools collapsed in the magnitude-8 earthquake, with thousands of children dying.
Earlier optimism was in line with a brief rally in GPS shares until news of another 7.4-magnitude earthquake in Japan knocked the wind out of a U.S. stock market rally.
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What is more, Lithuanian geologists have discovered that despite the fact that the Ignalina facility is built on a fault that was the site of an earthquake in 1907 of a magnitude of 7.1 on the Richter scale it is only designed to withstand tremors of up to 5.5.
What is more, Lithuanian geologists have discovered that -- despite the fact that the Ignalina facility is built on a fault that was the site of an earthquake in 1907 of a magnitude of 7.1 on the Richter scale -- it is only designed to withstand tremors of up to 5.5.
For example, the magnitude of the loss of life caused by the recent earthquake in Armenia was in large measure attributable to the fact that civilian construction in the USSR is systematically denied the steel prudent building techniques require in such a seismically active region.
The scenario established for the "Exercise IOWAVE 11" re-enacts the events of 26 December 2004, with a 9.2 magnitude earthquake off the North West coast of Sumatra (Indonesia), followed by an ocean-wide tsunami.
The Hsinchu-based company said it has an emergency mechanism that automatically does so when an earthquake of magnitude 4 or greater is detected.
Lincolnshire firefighters were part of the rescue effort in Japan following last year's 8.9-magnitude earthquake and tsunami in the coastal town of Ofunato.
In 1996, a 6.9 magnitude earthquake hit the city of Kobe, killing over 6, 400 people.
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In 2010, the team helped rescue more than 100 people after an earthquake with a magnitude of 7.0 struck Haiti.
It concluded that the six-storey structure collapsed within 10-20 seconds of the onset of the magnitude 6.3 earthquake on 22 February 2011.
Experts said Iran was spared from massive casualties and damages that could typically result from an earthquake of this magnitude because of geography and geophysics.
The 9.0 magnitude earthquake and following tsunami of 11 March 2011, claimed 20, 000 lives (65% of the victims were aged 60 or more) and destroyed more than 128, 000 homes.
In like manner, I believe that reactors should be designed such that an earthquake of any magnitude could not destroy the reactor or its containment shell, further that if the reactor core was to start to melt down, the melt down itself would shut the reactor down and, at the very worst, the reactor would entomb itself with no potential release of radiation into the environment.
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Scientists have linked the underground injection of oil-drilling wastewater to a magnitude-5.7 earthquake in 2011 that struck the US state of Oklahoma.
BBC: Oklahoma earthquake linked to oil extraction wastewater
Nearly 2, 500 megawatts of electric generating capacity tripped offline, including two nuclear reactors in Virginia, after a magnitude-5.8 earthquake rocked vast swaths of the eastern United States on Tuesday.
On Wednesday, a 7.2-magnitude earthquake struck off the coast of Honshu, the country's meteorological agency said.
Early Thursday, an earthquake with a preliminary magnitude of 6.3 struck off the same coast.
Nantou is near the epicenter of a magnitude-7.6 earthquake that struck Taiwan in 1999 and killed more than 2, 300 people.
Russia has been busy helping Japan recover from its March 11 natural disaster, when a 9.0 magnitude earthquake struck the main island of Japan.
In the seconds and minutes after a massive 8.9 magnitude earthquake shook the island nation of Japan to its core, Twitter brought the news to the world.
The first earthquake, with a magnitude of 6.4, hit Saturday at 4:53 p.m. local time, 37 miles northeast of Tabriz, according to the U.S. Geological Survey, which measured 11 aftershocks.
The first earthquake, with a magnitude of 6.4, hit Saturday at 4:53 p.m. local time, according to the U.S. Geological Survey, which said the epicenter was 23 kilometers (14 miles) southwest of Ahar.
CNN: More than 300 killed, 3,000 injured in Iran earthquakes
Then, an earthquake of 9.0 magnitude caused a tsunami that claimed an estimated 230, 000 lives.
The quake comes just days after an earthquake of 4.2 magnitude hit the region, sending tremors in New Delhi.
FORBES: Death Toll Rises After 6.8 Mag Earthquake Hits Sikkim, India-Reports
Earlier this week there was an earthquake of 2.4 magnitude in Loughborough in Leicestershire, and also a couple in the same location in January.
On October 27, a tsunami was spawned by a 7.7-magnitude earthquake that struck 86 miles south of Masset on British Columbia's Queen Charlotte Islands.
Exercise IOWave11 re-enacted the 26 December 2004 earthquake event, with a 9.2 magnitude earthquake off the North West coast of Sumatra (Indonesia), followed by an ocean-wide tsunami.
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