Small Earthquake Cluster Rattles San Ramon Area
On Friday morning, a series of small earthquakes rattled the San Ramon area. This event marks another instance in a recent string of seismic activity affecting the Tri-Valley region. According to data from the U.S. Geological Survey, the quakes occurred shortly after 8 a.m.
Details of the Earthquake Cluster
- A 3.0 magnitude quake at 8:14 a.m.
- A 2.8 magnitude quake at 8:16 a.m.
- A 2.6 magnitude quake at 8:18 a.m.
All three earthquakes were centered in a residential area just south of Bollinger Canyon Drive, situated between Dougherty Road and Alcosta Boulevard. This location has experienced a series of minor quakes since November.
Historical Context
The most significant quake in this recent cluster occurred on December 19, 2025, with a magnitude of 4.0. Fortunately, none of the quakes in this swarm have resulted in notable damage, and their strength has generally been insufficient to cause alarm among residents.
This ongoing seismic activity remains under observation, with further updates anticipated as more information becomes available. Residents are urged to stay informed about potential earthquake safety measures.
