In this map, the epicenter, determined by the USGS, appears to be on a strand of the Tres Pinos Fault, just east of the Calaveras Fault Zone.

In this map, the epicenter, determined by the USGS, appears to be on a strand of the Tres Pinos Fault, just east of the Calaveras Fault Zone.

In this map, the epicenter, determined by the USGS, appears to be on a strand of the Tres Pinos Fault, just east of the Calaveras Fault Zone.

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