Remember the earthquake swarm that hit San Ramon last week? The one on the Calaveras Fault, which is a branch of the San Andreas Fault that runs under the far East Bay? Well, disconcertingly enough, the swarm hasn't stopped. Like, it's still going. As of yesterday the total number of earthquakes to hit the area in the last eight days has jumped to around 250.
Yep. Two hundred and fifty.
The San Francisco Chronicle described the frequency of the quakes, noting that they've been coming nonstop.
The quakes — ranging from the hardly perceptible magnitude 0.8 to a more robust 3.6 — have been occurring every few minutes to every few hours, rattling residents in the surrounding communities, particularly San Ramon.
But no need to freak out, everyone. A geophysicist with the U.S. Geological Survey, Brad Aagaard, told KQED News that the isn't the first time USGS has observed swarms.
“We’ve seen large swarms like this in the past. One of the more significant ones was in 1990 under Alamo, where we had 350 earthquakes in 42 days.”
Scientists are also quick to point out that the swarm is not a sign of something larger to come. Sarah Minson, also with the USGS, reiterated this to the Chronicle.
“Little earthquakes don’t necessarily influence larger earthquakes. This really isn’t unusual, especially for that area.”
Thankfully, no injuries have been reported resulting from the earthquake swarm.
If you haven't already done it (why haven't you already done it?), now is yet another perfect opportunity to get that earthquake kit together.
Previously: Swarm Of Small Earthquakes Rocks San Ramon For Second Day