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The Cascadia and San Andreas Faults may be linked, with earthquakes on one triggering events in the other "with minimal or no separation in time," scientists have said. Chris Goldfinger and Joel Gutierrez, from Oregon State University, say their evidence showing a relationship between the two goes back almost 3,000 years. The controversial findings, which have not yet been published, will be presented at the American Geophysical Union fall meeting in San Francisco on Friday. The San Andreas Fault forms part of the tectonic boundary between the Pacific and North American Plate. It stretches about 750 miles along the east...

Provocative analysis of sea-floor cores suggests that quakes on the Cascadia fault off California can trigger tremors on the San Andreas. Two of North America’s most fearsome earthquake zones could be linked. A controversial study argues that at least eight times in the past 3,000 years, quakes made a one–two punch off the west coast of the United States. A quake hit the Cascadia fault off the coast of northern California, triggering a second quake on the San Andreas fault just to the south. In some cases, the delay between the quakes may have been decades long. The study suggests...

The Cascadia fault, a 600-mile-long collision between two chunks of the earth's crust off the Pacific Northwest coast, has been quiet for a long time, and that is not a comforting fact. Major earthquakes occur somewhere in the world every year or two. Catastrophic tsunamis - giant waves generated by undersea earthquakes or landslides - strike less often, and some of the largest of tsunamis originate in places that do not, at first glance, appear particularly treacherous. The devastating tsunamis created Dec. 26 by a magnitude 9.0 earthquake that killed as many as 150,000 people on the shores of the...

At 9PM on January 26, 1700 one of the world's largest earthquakes occurred along the west coast of North America. The undersea Cascadia thrust fault ruptured along a 680 mile length, from mid Vancouver Island to northern California in a great earthquake, producing tremendous shaking and a huge tsunami that swept across the Pacific. The Cascadia fault is the boundary between two of the Earth's tectonic plates: the smaller offshore Juan de Fuca plate that is sliding under the much larger North American plate. The earthquake also left unmistakable signatures in the geological record as the outer coastal regions subsided...

NEWPORT, Ore. – New Tsunami warnings from Japan on Thursday again reminded West coast residents that it was just a month ago when the devastating earthquake triggered massive waves here; while Tsunami experts at nearby Oregon State University point to the “Cascadia Subduction Zone” as a clear and present threat in the wake of these new aftershocks that are rattling Japan again and causing new Tsunami warnings in the Pacific. According to recent reports by scientists at nearby Oregon State University in Corvallis, this Cascadia Subduction zone “has just experienced a cluster of four massive earthquakes during the past 1,600...