San Andreas Fault Archives - Northwest Public Broadcasting

Oregon Scientists Develop A More Accurate Way To Date Past Earthquakes

By NWPB News May 27, 2020

USGS scientists examine a surface rupture created during the M7.1 Searles Valley earthquake in 2019.

The work by researchers at Portland State University and the University of Oregon, published in the Bulletin of the Seismological Society of America, offers a solution to a common problem that arises when using radiocarbon dating to determine the past activity of faults.Read More

The Big One — And Another One. Research Shows Cascadia Quakes Sometimes Trigger San Andreas

By Tom Banse December 3, 2019

The Cascadia Subduction Zone off the coast of North America can produce earthquakes as large as Magnitude 9 and corresponding tsunamis. MUSTAFA LAZKANI / FEMA

Scientists found nine to eleven instances over roughly the last 3,000 years where a Cascadia earthquake seems to have triggered a San Andreas quake. The vast majority of great Cascadia quakes during that period have a correlation on the San Andreas Fault. Read More

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