A series of at least 20 small earthquakes has struck in the San Ramon Valley in the last day, according to the U.S. Geological Survey.
The quakes ranged between 1.5 magnitude and 3.0 magnitude, according to the USGS.
The 3.0-magnitude temblor was reported at 8:14 a.m. Wednesday with a depth of 5.3 miles. It was centered near Crow Canyon Country Club in Danville, just north of the city's border with San Ramon, according to the USGS. The 1.5-magnitude quake struck in the same area 16 minutes earlier.
Other notable quakes reported in the San Ramon Valley early Wednesday morning included a 2.6-magnitude quake at 3:22 a.m. and a 2.9 quake at 3:58 a.m., according to the USGS.
No property damage or injuries have been reported as a result of the quakes.