December 10, 2012 – UNITED STATES – Stanford geophysicists were well represented at the meeting of the American Geophysical Union last week in San Francisco. Included among the many presentations were several studies that relate to predicting – and preparing for – major earthquakes in the Himalaya Mountains and the Pacific Northwest.
Map showing Himalayan Fault line – The Main Himalayan Thrust has historically been responsible for a
magnitude 8 to 9 earthquake every several hundred years. Credit Warren Caldwell/Stanford University.
Measuring Small Tremors In The Pacific Northwest. The Cascadia subduction zone, which stretches from northern California to Vancouver Island, has not experienced a major seismic event since it ruptured in 1700, an 8.7–9.2 magnitude earthquake that shook the region and created a tsunami that reached Japan. And while many geophysicists believe the fault is due for a similar scale event, the relative lack of any earthquake data in the Pacific Northwest makes it difficult to predict how ground motion from a future event would propagate in the Cascadia area, which runs through Seattle, Portland and Vancouver…