Spike of Activity in San Andreas Fault

NASA Radar 3-D View of San Andreas Fault.  This false-colour radar image shows a section of the fault west of San Francisco Bay.  Image credit:  NASA Jet Propulsion Laboratory

NASA Radar 3-D View of San Andreas Fault. This false-colour radar image shows a section of the fault west of San Francisco Bay. Image credit: NASA Jet Propulsion Laboratory

Scientists at UC-Berkeley have detected a surge of activity in the San Andreas fault near the area that produced the 1857 quake that was a magnitude 7.8.   Researchers found that approximately 2,200 “deep earth tremors” had occurred since 2001.  These deep tremors may indicate that stress is building faster than previously thought and that there is increased risk of a major quake.  For more information, see ScienceDaily.

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