Dec. 5: Earthquake measuring 2.2 struck region close to Fortuna, CA

HUMBOLDT COUNTY, CA - Friday afternoon, a preliminary 2.2 magnitude quake was recorded close to Fortuna, according to the U.S. Geological Survey.

False earthquake alert that alarmed California was 'unprecedented.' Here's what we know so far

An earthquake of magnitude 5.9 shook Nevada on Thursday morning, according to the United States Geological Survey. Phones buzzed as far away as San Francisco, though no shaking was evident in much of the Bay Area.

'Errant' earthquake alert wakes up Bay Area with warning of 5.9 quake

Just after 8 a.m. Bay Area residents received a MyShake alert warning of magnitude 5.9 earthquake hitting east of Carson City, Nevada close to the Lake Tahoe region. The quake also appeared on the USGS map of latest earthquakes. But within minutes the report of the quake disappeared on the USGS page.
KQED

False Earthquake Alert Likely Triggered by ‘Something Out in the Field,’ USGS Says

“On December 4, 2025, the ShakeAlert EEW system released an incorrect alert for a magnitude 5.9 earthquake near Reno and Carson City, Nevada,” the statement read. “The event did not occur, and has been deleted from USGS websites and data feeds. The USGS is working to understand the cause of the false alert.”

Series of Earthquakes Rock California’s Bay Area Near Gilroy

A series of earthquakes rattled California’s Bay Area near Gilroy on Wednesday, according to the U.S. Geological Survey. The largest was a magnitude 4.0 quake centered about 8 kilometers east of Gilroy, followed by a magnitude 3.6 quake southeast of the city and a magnitude 2.7 event to the east.

Update: Seismic activity on Dec. 4 - 2.7 magnitude earthquake near San Simeon, CA detected

MONTEREY COUNTY, CA - A preliminary 2.7 magnitude quake was registered near San Simeon Thursday morning, the U.S. Geological Survey reported.
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