Cloverdale, California – Two earthquakes struck northern California early Thursday morning, with a stronger second quake following just minutes after the first near Cloverdale.
According to the U.S. Geological Survey, a magnitude 2.7 earthquake was recorded at 12:00 a.m. PST, centered approximately 13 kilometers east-northeast of Cloverdale at a depth of 2.7 kilometers. About 23 seconds later, a stronger magnitude 4.2 earthquake struck roughly 12 kilometers east-northeast of Cloverdale, at a shallow depth of 2.3 kilometers.
The second quake was widely felt across northern Sonoma County and surrounding parts of Northern California, prompting multiple public “Did You Feel It?” reports submitted to the USGS. The shaking intensity for the larger quake reached Level IV (Light) on the Modified Mercalli Intensity Scale, indicating noticeable shaking indoors but no immediate reports of serious damage.
USGS PAGER analysis indicates no expected fatalities or significant economic losses, and the event is classified as GREEN, meaning impacts are likely limited. Aftershock forecasts show a 22% chance of magnitude 3 or greater aftershocks within the next week, with lower probabilities for stronger events.
Local emergency officials have not reported injuries or structural damage as of Thursday morning. Residents in the Cloverdale area are advised to remain aware of potential aftershocks and review basic earthquake safety procedures.
The earthquakes were reviewed by the California Integrated Seismic Network, operated by UC Berkeley and USGS partners.
