M2.5 Earthquake 11 km ESE of Willits, CA — July 23, 2026
2026-07-23 00:30:37 UTC (2 hours ago) · approx. 4:30 PM UTC-8 local
On July 23, 2026 at 00:30 UTC, a magnitude 2.5 shallow crustal earthquake struck 11 km ESE of Willits, CA, at a depth of 6.8 km and coordinates 39.3762°, -123.2345°.
Physical scale: An earthquake of magnitude 2.5 releases seismic energy equivalent to roughly 97.4 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 34 m — a useful intuition for the size of the slip patch on the fault.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.6 mainshock that occurred 28 days ago 11 km N of Redwood Valley, CA. Since the mainshock, the USGS has recorded 24 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 2 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-123.2345°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.5 earthquake near Willits, CA?
The magnitude 2.5 earthquake that struck 11 km ESE of Willits, CA on July 23, 2026 at 00:30 UTC had a depth of 6.8 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 2.5 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.6 one earlier?
No. This magnitude 2.5 earthquake is an aftershock of the larger magnitude 5.6 mainshock that occurred earlier 11 km N of Redwood Valley, CA. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Actions
Understanding This Data
Magnitude 2.5 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: nc75403997). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 23, 2026). M2.5 Earthquake 11 km ESE of Willits, CA — July 23, 2026. Retrieved July 23, 2026 from https://www.earthquaketracker.org/earthquakes/event/nc75403997/