Overview
- The sequence began around 6:32 p.m. Saturday with a quake first listed at 3.9 and later updated to 4.0, according to the USGS.
- Two additional earthquakes followed in the next 20 minutes, measured at magnitudes 2.8 and 3.0.
- The events were centered just south of San Ramon, with reported depths near 3.1 miles for the first and about 2.5 miles for the third.
- KTVU staff felt the shaking in Oakland, and viewers reported movement in San Francisco.
- The Saturday evening cluster followed multiple quakes in the same area on Friday night and a 2.6 event Saturday morning.