M4.4 Earthquake 82 km SSE of Adak, Alaska — October 7, 2024
2024-10-07 21:06:55 UTC (2024-10-07) · approx. 9:06 AM UTC-12 local
On October 7, 2024 at 21:06 UTC, a magnitude 4.4 shallow crustal earthquake struck 82 km SSE of Adak, Alaska, at a depth of 36.1 km and coordinates 51.1757°, -176.2231°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 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 15 days ago 94 km SSE of Adak, Alaska. Since the mainshock, the USGS has recorded 8 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
-176.2231°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.4 earthquake near Adak, Alaska?
The magnitude 4.4 earthquake that struck 82 km SSE of Adak, Alaska on October 7, 2024 at 21:06 UTC had a depth of 36.1 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.4 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 4.4 earthquake is an aftershock of the larger magnitude 5.0 mainshock that occurred earlier 94 km SSE of Adak, Alaska. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000nx5b). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, October 7, 2024). M4.4 Earthquake 82 km SSE of Adak, Alaska — October 7, 2024. Retrieved December 23, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000nx5b/