M3.0 Earthquake 153 km WSW of Adak, Alaska — September 21, 2024
2024-09-21 18:28:58 UTC (2024-09-21) · approx. 6:28 AM UTC-12 local
On September 21, 2024 at 18:28 UTC, a magnitude 3.0 shallow crustal earthquake struck 153 km WSW of Adak, Alaska, at a depth of 35.0 km and coordinates 51.2700°, -178.6191°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 477 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 71 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-178.6191°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Adak, Alaska?
The magnitude 3.0 earthquake that struck 153 km WSW of Adak, Alaska on September 21, 2024 at 18:28 UTC had a depth of 35.0 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000nned). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, September 21, 2024). M3.0 Earthquake 153 km WSW of Adak, Alaska — September 21, 2024. Retrieved November 23, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000nned/