M2.2 Earthquake 85 km ENE of Port Alsworth, Alaska — September 14, 2023
2023-09-14 19:37:35 UTC (2023-09-14) · approx. 9:37 AM UTC-10 local
On September 14, 2023 at 19:37 UTC, a magnitude 2.2 intermediate depth earthquake struck 85 km ENE of Port Alsworth, Alaska, at a depth of 134.4 km and coordinates 60.5578°, -152.9474°.
Physical scale: An earthquake of magnitude 2.2 releases seismic energy equivalent to roughly 30.1 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 20 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
-152.9474°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.2 earthquake near Port Alsworth, Alaska?
The magnitude 2.2 earthquake that struck 85 km ENE of Port Alsworth, Alaska on September 14, 2023 at 19:37 UTC had a depth of 134.4 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 2.2 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 2.2 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak023btcnfm7). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 14, 2023). M2.2 Earthquake 85 km ENE of Port Alsworth, Alaska — September 14, 2023. Retrieved September 28, 2023 from https://www.earthquaketracker.org/earthquakes/event/ak023btcnfm7/