4.1 mi SW of Castro Valley (Alameda County)
4km NE of Fairview, CA
Wednesday, December 29, 2021 at 4:58:20 AM
about 4 years ago
Did you feel this earthquake?
Share your experience with the community! Your report helps others understand how this earthquake was felt in different areas.
Scroll down to add your report or check out what others experienced.
Epicenter Location
Be Prepared for Next Time
After feeling that M2.3 earthquake, are you ready?
72-Hour Emergency Kit (2-Person)
72-Hour Emergency Kit (4-Person)
Premium Bug Out Bag
Emergency Crank Radio
Anker Prime Power Bank
EcoFlow Power Station
As an Amazon Associate, Bay Tremor earns from qualifying purchases.
Community Reports
Share your experience! Tell us where you were and what you felt. Your report helps others understand the impact of this earthquake.
Join the Forum Discussion
Extended discussion with the community
What This Means
A magnitude 2.3 earthquake is rarely felt by people but is recorded by seismometers. These small earthquakes are very common.
This was a shallow earthquake (4.5 mi deep), which can feel stronger at the surface than deeper earthquakes of the same magnitude.
Want to see more earthquakes?
Explore the live earthquake map and track all recent seismic activity in the Bay Area.