The earthquake struck at 7:35 a.m. There are no reports of injuries.
RELATED: Bay Area Earthquake Tracker
The USGS ranks this as a level one quake, its lowest of eight levels -- which means it will only be felt by a very few, under especially favorable conditions.
VIDEO: USGS report: Bay Area quake could lead to massive loss of life, property
VIDEO: What to pack in your earthquake emergency kit
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