M2.3 Earthquake 44 km E of Denali National Park, Alaska — August 28, 2023
2023-08-28 15:57:25 UTC (2023-08-28) · approx. 5:57 AM UTC-10 local
On August 28, 2023 at 15:57 UTC, a magnitude 2.3 shallow crustal earthquake struck 44 km E of Denali National Park, Alaska, at a depth of 12.5 km and coordinates 63.4691°, -150.8471°.
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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.0 mainshock that occurred 28 days ago 52 km E of Denali National Park, 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
-150.8471°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 2.3 earthquake near Denali National Park, Alaska?
The magnitude 2.3 earthquake that struck 44 km E of Denali National Park, Alaska on August 28, 2023 at 15:57 UTC had a depth of 12.5 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.
Is this the same earthquake as the M5.0 one earlier?
No. This magnitude 2.3 earthquake is an aftershock of the larger magnitude 5.0 mainshock that occurred earlier 52 km E of Denali National Park, Alaska. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 2.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak023b1692dc). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 28, 2023). M2.3 Earthquake 44 km E of Denali National Park, Alaska — August 28, 2023. Retrieved November 4, 2023 from https://www.earthquaketracker.org/earthquakes/event/ak023b1692dc/