M2.1 Earthquake 29 km NNW of Susitna, Alaska — September 15, 2026
2026-09-15 23:50:50 UTC (5 days ago) · approx. 1:50 PM UTC-10 local
On September 15, 2026 at 23:50 UTC, a magnitude 2.1 shallow crustal earthquake struck 29 km NNW of Susitna, Alaska, at a depth of 64.6 km and coordinates 61.7750°, -150.7780°.
Physical scale: An earthquake of magnitude 2.1 releases seismic energy equivalent to roughly 21.3 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 17 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
-150.7780°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.1 earthquake near Susitna, Alaska?
The magnitude 2.1 earthquake that struck 29 km NNW of Susitna, Alaska on September 15, 2026 at 23:50 UTC had a depth of 64.6 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 2.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 2.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: aka2026sinind). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 15, 2026). M2.1 Earthquake 29 km NNW of Susitna, Alaska — September 15, 2026. Retrieved September 16, 2026 from https://www.earthquaketracker.org/earthquakes/event/aka2026sinind/