Graph of Magnitude 1.0+ earthquake activity along the San Francisco Peninsula from Half Moon Bay to the Golden Gate Bridge, 1997 - 2001
Activity has risen and fallen at various rates along this the portion of the Central California Coast. During the last four years, activity has topped the 8 eq/mth mark four times: once in March 1997 (9 events), in July 1999, in June and July 2000 (each with 10 events), and most recently, in August 2001 with 10 events - the highest tally in the four year period.
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