Latest Cascadia subduction zone Stories

2009-02-16 11:00:00

Researchers are using modern technology to study "silent earthquakes" along a major fault zone beneath the Nicoya Peninsula in Costa Rica. Also known as slow slip events, they involve the same motion as an earthquake, but they occur so slowly that they can only be detected by networks of modern instruments. Scientists are using a network of 13 Global Positioning System (GPS) monitoring stations and 13 seismic stations to measure precisely the movements of the Earth's crust on the peninsula...

2009-01-29 17:30:16

In the last decade, scientists have recorded regular episodes of tectonic plates slowly, quietly slipping past each other in western Washington and British Columbia over periods of two weeks or more, releasing as much energy as a magnitude 6 earthquake. The slip events coincide with regular occurrences of what scientists call nonvolcanic tremor, which showed up clearly on seismometers but for which the origins were uncertain. Now researchers from Italy and the University of Washington have...

2008-04-14 21:00:00

Scientists released the first official statewide forecast of earthquake probabilities for California Monday, reporting a 99 percent probability of a strong and damaging earthquake of magnitude of 6.7 or greater occurring along one of the state's major seismic faults within the next 30 years. The report, submitted by federal and state seismologists, geologists and geophysicists, said there was a 46 percent chance of an even more damaging magnitude 7.5 or greater earthquake occurring during the...

2008-04-14 00:25:00

A peculiar swarm of earthquakes have been occurring off of Oregon's central coast, resembling those that happen just prior to a volcanic eruption. However, scientists are baffled as there are no volcanoes in the area.  There have been more than 600 quakes during the past 10 days in an area 150 miles southwest of Newport. The largest quake was a magnitude of 5.4, with two others measuring greater than magnitude 5.0, OSU reported.Few of the quakes have been strong enough to be felt on...

2008-04-03 08:55:00

Discovery means other sites such as the Cascadia Subduction Zone in northwestern North America have potential for more severe earthquakes than once thoughtOn the one year anniversary of a devastating earthquake and tsunami in the Solomon Islands that killed 52 people and displaced more than 6,000, scientists are revising their understanding of the potential for similar giant earthquakes in other parts of the globe.Geoscientists from The University of Texas at Austin's Jackson School of...

2008-02-26 14:40:00

Simulation May Help Big Cities Develop Early Warning Systems On January 26, 1700, at about 9 p.m. local time, the Juan de Fuca plate beneath the ocean in the Pacific Northwest suddenly moved, slipping some 60 feet eastward beneath the North American plate in a monster quake of approximately magnitude 9, setting in motion large tsunamis that struck the coast of North America and traveled to the shores of Japan.Since then, the earth beneath the region "“ which includes the cities of...

2006-03-02 04:15:00

PASADENA, Calif. -- The Sumatra-Andaman earthquake of December 26, 2004, was one of the worst natural disasters in recent memory, mostly on account of the devastating tsunami that followed it. A group of geologists and geophysicists, including scientists at the California Institute of Technology, has delineated the full dimensions of the fault rupture that caused the earthquake. Their findings, reported in the March 2 issue of the journal Nature, suggest that previous ideas about where giant...

2005-12-02 11:31:39

CORVALLIS, Ore. "“ The magnitude 9.2 earthquake that triggered a devastating tsunami in the Indian Ocean in December of 2004 originated just off the coast of northern Sumatra, but an "energy pulse" "“ an area where slip on the fault was much greater "“ created the largest waves, some 100 miles from the epicenter. Seismologists have mapped these energy pulses for Sumatra and are trying to learn more about them to predict better when and where tsunamis may occur. They also...

2005-12-02 11:26:22

The catastrophic tsunami that struck Indonesia and East Asia almost a year ago has done much to heighten the interest, research programs and preparations in the United States for events of this type, but experts say there are areas that need more attention and challenges yet to be met. Dec. 26 will mark the first anniversary of the tsunami that claimed the lives of about 275,000 people and struck with waves up to 100 feet high, one of the deadliest disasters in modern history. Since that...

2005-07-11 23:15:00

Stories of two-headed serpents and epic battles between Thunderbird and Whale, common among Northwest native peoples, have their root in the region's seismic history. New research led by a University of Washington scientist has found stories that could relate to a large Seattle fault earthquake around A.D. 900 and specific eyewitness accounts linked to a mammoth 1700 earthquake and tsunami in the Cascadia subduction zone. The stories come from people living in areas from northern California...

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