Quake swarm rattles California community east of Monterey, seismologists say
A swarm of at least eight earthquakes reaching up to 3.4 magnitude rattled the Tres Pinos area in Northern California, the U.S. Geological Survey reports.
The other quakes in the Thursday, Feb. 1, swarm ranged from 1.3 to 3.3 magnitude, according to the USGS.
A three-hour series of quakes, including two 3.4-magnitude temblors, began at 9:32 a.m., the USGS reported. More followed, with the most recent striking at 12:17 p.m.
The first 4-mile deep, 3.4-magnitude quake hit about 8 miles from Tres Pinos, according to the USGS.
About 25 people from as far away as Santa Fe Springs and Los Banos reported feeling the tremors to the agency.
A second 3.4-magnitude earthquake hit at 11:28 a.m., the USGS said.
Tres Pinos is about 100 miles southeast of San Francisco, about 50 miles inland from Monterey, in San Benito County.
What to know about earthquakes
Magnitude measures the energy released at the source of the earthquake, the U.S. Geological Survey says. It replaces the old Richter scale.
Quakes between 2.5 and 5.4 magnitude are often felt but rarely cause much damage, according to Michigan Tech. Quakes below 2.5 magnitude are seldom felt by most people.
Earthquakes’ sudden, rapid shaking can cause fires, tsunamis, landslides or avalanches. They can happen anywhere, but they’re most common in Alaska, California, Hawaii, Oregon, Puerto Rico and Washington, according to the Department of Homeland Security.
If an earthquake strikes, it’s best to protect yourself right away. Here are tips from experts:
If you’re in a car: Pull over and stop. Set your parking brake.
If you’re in bed: Turn face-down and cover your head with a pillow.
If you’re outdoors: Stay away from buildings. Don’t go inside.
If you’re inside: Stay and don’t run outdoors. Stay away from doorways.
The best way to protect yourself during an earthquake is to drop, cover and hold on, officials say.
“Wherever you are, drop down to your hands and knees and hold onto something sturdy,” officials say. “If you’re using a wheelchair or walker with a seat, make sure your wheels are locked and remain seated until the shaking stops.”
Be sure to cover your head and neck with your arms, and crawl under a sturdy table if possible. If no shelter is available, crawl to an interior wall away from windows.
Once under a table, officials say you should hold on with one hand and be ready to move with it.
“There can be serious hazards after an earthquake, such as damage to the building, leaking gas and water lines, or downed power lines,” officials say. “Expect aftershocks to follow the main shock of an earthquake. Be ready to Drop, Cover, and Hold On if you feel an aftershock.”
This story was originally published February 1, 2024 at 1:38 PM with the headline "Quake swarm rattles California community east of Monterey, seismologists say."