M2.9 Earthquake 2km NE of The Geysers, CA — September 17, 2020
2020-09-17 18:36:25 UTC (2020-09-17) · approx. 10:36 AM UTC-8 local
On September 17, 2020 at 18:36 UTC, a magnitude 2.9 shallow crustal earthquake struck 2km NE of The Geysers, CA, at a depth of 1.1 km and coordinates 38.7922°, -122.7417°.
Physical scale: An earthquake of magnitude 2.9 releases seismic energy equivalent to roughly 326 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 59 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 6 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
-122.7417°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.9 earthquake near The Geysers, CA?
The magnitude 2.9 earthquake that struck 2km NE of The Geysers, CA on September 17, 2020 at 18:36 UTC had a depth of 1.1 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 2.9 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 2.9 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: nc73459266). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, September 17, 2020). M2.9 Earthquake 2km NE of The Geysers, CA — September 17, 2020. Retrieved November 28, 2020 from https://www.earthquaketracker.org/earthquakes/event/nc73459266/