3.1 earthquake strikes San Ramon after midnight

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Saturday, December 19, 2015
map of where magnitude 3.1 earthquake hit in San Ramon
A magnitude 3.1 earthquake hit San Ramon at 12:34 a.m. Saturday, December 19, 2015.
USGS

SAN RAMON, Calif. (KGO) -- A magnitude 3.1 earthquake hit San Ramon at 12:34 a.m. Saturday. There are no reports of damage. This is in the same area where an earthquake swarm occurred in October.

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