This page summarizes earthquakes in Alameda County (United States). The most recently recorded event was a magnitude M0.9 earthquake near Fremont on 2026-06-15 00:45:37 UTC. All event lists and map markers are limited to the last 30 days.
Alameda County is located in the U.S. state of California. As of the 2020 census, the population was 1,682,353, making it the 7th-most populous county in the state and 21st most populous nationally. The county seat is Oakland.
In 2026, Alameda County recorded 48 earthquakes within United States. The average magnitude was M1.48. The strongest event reached M2.6.
By event count in 2026, this region ranks #47 within United States.
Located on the North America Plate.
