This page summarizes earthquakes in Sonoma County (United States). The most recently recorded event was a magnitude M1.0 earthquake near Sonoma County on 2026-07-31 18:25:57 UTC. All event lists and map markers are limited to the last 30 days.
Sonoma County is a county located in the northern part of the U.S. state of California. As of the 2020 United States census, its population was 488,863. Its seat of government and largest city is Santa Rosa.
In 2026, Sonoma County recorded 2927 earthquakes within United States. The average magnitude was M0.97. The strongest event reached M4.3.
Based on the number of recorded earthquakes in 2026, Sonoma County is currently among the Top 5 most active regions in United States (rank #1 by count).
Located on the North America Plate.
