New Delhi, Jan. 9 -- A series of small earthquakes rattled the San Ramon area, in California, on Friday morning (January 9), according to the United States Geological Survey (USGS), marking the latest in a string of seismic activity recorded in the region in recent months.

Three quakes in quick succession

The USGS reported three preliminary earthquakes within minutes of each other:

8:14 a.m.: Magnitude 3.0

8:16 a.m.: Magnitude 2.8

8:18 a.m.: Magnitude 2.6

All three tremors were centered near San Ramon and were classified as minor. There were no immediate reports of injuries or damage.

Part of ongoing quake swarms

Friday's activity follows a pattern of earthquake swarms that have affected the area over the past several months, draw...