Overview
- At least six earthquakes struck south of San Ramon early Monday, according to the USGS.
- The largest quake, a magnitude 3.7 at 9:07 a.m., was centered about 2.3 miles southeast of the city.
- Earlier events included magnitudes 2.9 at 2:33 a.m., 3.0 at 5:21 a.m., 2.7 at 5:37 a.m., 2.5 at 7:24 a.m., and 2.6 at 9:05 a.m.
- USGS user reports indicate the tremors were widely felt across the Tri‑Valley, with felt reports reaching Oakland and San Jose.
- No injuries or damage were immediately reported, and the activity follows weeks of similar small‑magnitude clusters, with at least 15 M2.5+ quakes recorded since November 9.