M3.4 Earthquake 66 km E of Atka, Alaska — February 21, 2024
2024-02-21 19:14:29 UTC (2024-02-21) · approx. 7:14 AM UTC-12 local
On February 21, 2024 at 19:14 UTC, a magnitude 3.4 intermediate depth earthquake struck 66 km E of Atka, Alaska, at a depth of 87.4 km and coordinates 52.1008°, -173.2454°.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 1.9 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 134 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-173.2454°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near Atka, Alaska?
The magnitude 3.4 earthquake that struck 66 km E of Atka, Alaska on February 21, 2024 at 19:14 UTC had a depth of 87.4 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 3.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000m4cf). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, February 21, 2024). M3.4 Earthquake 66 km E of Atka, Alaska — February 21, 2024. Retrieved May 2, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000m4cf/