M4.0 Earthquake 138 km WNW of Adak, Alaska — November 22, 2024
2024-11-22 18:13:38 UTC (2024-11-22) · approx. 6:13 AM UTC-12 local
On November 22, 2024 at 18:13 UTC, a magnitude 4.0 intermediate depth earthquake struck 138 km WNW of Adak, Alaska, at a depth of 186.0 km and coordinates 52.3739°, -178.4824°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-178.4824°E
Technical Information
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Common Questions
How strong was the magnitude 4.0 earthquake near Adak, Alaska?
The magnitude 4.0 earthquake that struck 138 km WNW of Adak, Alaska on November 22, 2024 at 18:13 UTC had a depth of 186.0 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000nwlw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, November 22, 2024). M4.0 Earthquake 138 km WNW of Adak, Alaska — November 22, 2024. Retrieved January 30, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000nwlw/