M2.2 Earthquake 26 km N of Skwentna, Alaska — September 12, 2024
2024-09-12 18:50:38 UTC (2024-09-12) · approx. 8:50 AM UTC-10 local
On September 12, 2024 at 18:50 UTC, a magnitude 2.2 intermediate depth earthquake struck 26 km N of Skwentna, Alaska, at a depth of 90.3 km and coordinates 62.2240°, -151.3951°.
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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.6 mainshock that occurred 1 day ago 57 km WNW of Skwentna, Alaska. Since the mainshock, the USGS has recorded 10 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 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
-151.3951°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.2 earthquake near Skwentna, Alaska?
The magnitude 2.2 earthquake that struck 26 km N of Skwentna, Alaska on September 12, 2024 at 18:50 UTC had a depth of 90.3 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.
Is this the same earthquake as the M5.6 one earlier?
No. This magnitude 2.2 earthquake is an aftershock of the larger magnitude 5.6 mainshock that occurred earlier 57 km WNW of Skwentna, Alaska. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 2.2 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak024brolg1u). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, September 12, 2024). M2.2 Earthquake 26 km N of Skwentna, Alaska — September 12, 2024. Retrieved October 14, 2024 from https://www.earthquaketracker.org/earthquakes/event/ak024brolg1u/