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Seismologists surprised by deep California quakes

New type of weak temblors in upper mantle detected

Newport-Inglewood Fault

CURIOUS QUAKES  A dense network of seismometers monitoring the Newport-Inglewood Fault in Southern California detected earthquakes originating from far deeper underground than once thought possible.

 

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By Thomas Sumner

- More than 2 years ago

Mysterious earthquakes rattle deep beneath Southern California.

The tiny quakes originate from tens of kilometers below ground along the Newport-Inglewood Fault near Long Beach, Calif.,