"Monday's earthquake swarm centered near the East Bay city of San Ramon was not the first to hit the area in recent weeks and months, but it was probably the most sustained, after a few other earthquakes hit there on Friday. SFist initially reported on the series of earthquakes around 8 am, at which point 17 earthquakes had struck with magnitudes measuring between 2.0 and 4.2. The swarm continued throughout the day, with some of the quakes around 1.0M being less noticeable, ultimately totaling 75."
"As one area resident, Sue Wild, tells the Chronicle today, the first quake to hit Monday morning, a 3.8M that struck at 6:27 am, was no joke if you were in the immediate vicinity. "It literally felt like a freight train was coming through the middle of the bed." Area residents admit that they're pretty rattled at this point, nerves on edge, etc., anticipating that all these mini-quakes are leading up to a Big One in the near future, where more than just a few trinkets may fall off some shelves."
""Obviously, mentally it's kind of taxing and you are always thinking about, Is this the big one?' says 45-year-old recent San Ramon transplant Lynn Tao, speaking to the Chronicle, after relocating there in 2024. The Chronicle asks the question of whether San Ramon has now become the most seismically active area in the world, but experts say that's actually hard to pin down."
An earthquake swarm has affected San Ramon for three months, peaking with 75 small and mid-size quakes in one day. Early Monday morning 17 quakes between magnitudes 2.0 and 4.2 were reported, and the sequence included many smaller events around 1.0M. The activity continued into Tuesday with a 2.5M at 1:45 pm and a 2.8M at 9 am according to the US Geological Survey. A 3.8M at 6:27 am produced strong shaking for nearby residents. Local nerves are frayed amid concerns that the swarms could precede a larger earthquake, while experts caution that comparing seismic activity across regions is difficult.
Read at sfist.com
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