Over the weekend, there were earthquakes on either end of the San Andreas Fault system, highlighting the tips of two great earthquakes. In Northern California, a M=4.0 quake near the Mendocino Triple Junction marks the terminus of the 1906 M=7.9 earthquake which devastated San Francisco. In Southern California, a M=3.5 earthquake just east of San Bernardino is the southern end of the 1812 M=7.5 Wrightwood earthquake that killed 40 people in a church in San Juan Capistrano over 100 km away. While neither of the quakes over the weekend were large enough to cause damage, there were both felt, and because of the importance of their locations, deserve attention.
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