M3.3 Earthquake 213 km SE of Chiniak, Alaska — October 4, 2024
2024-10-04 18:40:43 UTC (2024-10-04) · approx. 8:40 AM UTC-10 local
On October 4, 2024 at 18:40 UTC, a magnitude 3.3 shallow crustal earthquake struck 213 km SE of Chiniak, Alaska, at a depth of 22.2 km and coordinates 56.5368°, -149.3654°.
Physical scale: An earthquake of magnitude 3.3 releases seismic energy equivalent to roughly 1.3 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 114 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-149.3654°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near Chiniak, Alaska?
The magnitude 3.3 earthquake that struck 213 km SE of Chiniak, Alaska on October 4, 2024 at 18:40 UTC had a depth of 22.2 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 3.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000nwl2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, October 4, 2024). M3.3 Earthquake 213 km SE of Chiniak, Alaska — October 4, 2024. Retrieved December 14, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000nwl2/