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Magnitude 5.5 near Portola, CA

Information from UCB, USGS Menlo Park, & UNR
Location: 14 km (9 miles) W of Portola, CA
39.828, -120.632
Date & Time (Local): 2001/08/10
13:19:26.97 (PDT)
Date & Time (UTC): 2001/08/10
20:19:26.97 (UTC)
Depth (km): 14
ML: 5.5
Mw: 5.2
Fault Zone: Mohawk Valley

This area of California averages a M5 or larger earthquake approximately every 20 years or so. According to Tousson Toppozada of the California Division of Mines and Geology, historical events in this area include:

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