A magnitude 4.1 earthquake rattled parts of Northern California early Monday morning, striking just north of Santa Rosa in one of the state’s most seismically active regions.
The quake hit at 7:08 a.m. about half a mile from The Geysers, a hotspot for frequent tremors thanks to the world’s largest geothermal energy field beneath its surface. According to the U.S. Geological Survey, the quake originated at a shallow depth of 2.0 km and had been reported felt by at least 65 people by 7:40 a.m.
Just minutes later, a 2.8 aftershock followed.
The jolt comes amid a noticeable uptick in seismic activity across the Bay Area this month. Roughly 90 small earthquakes have shaken the San Ramon area in the East Bay over the past few weeks. It’s a pattern locals may recognize: this is at least the sixth swarm to hit that region since 1970, with the most recent cluster occurring in 2015…