M2.3 Earthquake 26 km NW of Anchor Point, Alaska — September 23, 2021
2021-09-23 19:00:38 UTC (2021-09-23) · approx. 9:00 AM UTC-10 local
On September 23, 2021 at 19:00 UTC, a magnitude 2.3 intermediate depth earthquake struck 26 km NW of Anchor Point, Alaska, at a depth of 85.4 km and coordinates 59.9187°, -152.2210°.
Physical scale: An earthquake of magnitude 2.3 releases seismic energy equivalent to roughly 42.5 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 23 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 1 citizen response 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
-152.2210°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.3 earthquake near Anchor Point, Alaska?
The magnitude 2.3 earthquake that struck 26 km NW of Anchor Point, Alaska on September 23, 2021 at 19:00 UTC had a depth of 85.4 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 2.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 2.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak021c889mtb). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 23, 2021). M2.3 Earthquake 26 km NW of Anchor Point, Alaska — September 23, 2021. Retrieved December 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/ak021c889mtb/