M3.7 Earthquake 98 km SE of McCarthy, Alaska — October 6, 2024
2024-10-06 17:20:32 UTC (2024-10-06) · approx. 8:20 AM UTC-9 local
On October 6, 2024 at 17:20 UTC, a magnitude 3.7 shallow crustal earthquake struck 98 km SE of McCarthy, Alaska, at a depth of 7.1 km and coordinates 60.8765°, -141.5113°.
Physical scale: An earthquake of magnitude 3.7 releases seismic energy equivalent to roughly 5.4 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 215 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 5.2 mainshock that occurred 22 days ago 122 km SE of McCarthy, Alaska. Since the mainshock, the USGS has recorded 1 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
-141.5113°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.7 earthquake near McCarthy, Alaska?
The magnitude 3.7 earthquake that struck 98 km SE of McCarthy, Alaska on October 6, 2024 at 17:20 UTC had a depth of 7.1 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 3.7 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.2 one earlier?
No. This magnitude 3.7 earthquake is an aftershock of the larger magnitude 5.2 mainshock that occurred earlier 122 km SE of McCarthy, Alaska. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 3.7 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak024cvcpwds). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, October 6, 2024). M3.7 Earthquake 98 km SE of McCarthy, Alaska — October 6, 2024. Retrieved December 14, 2024 from https://www.earthquaketracker.org/earthquakes/event/ak024cvcpwds/