M3.8 Earthquake 140 km ESE of Nikolski, Alaska — April 30, 2024
2024-04-30 17:18:58 UTC (2024-04-30) · approx. 6:18 AM UTC-11 local
On April 30, 2024 at 17:18 UTC, a magnitude 3.8 shallow crustal earthquake struck 140 km ESE of Nikolski, Alaska, at a depth of 10.0 km and coordinates 52.5386°, -166.8895°.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 7.6 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 252 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-166.8895°E
Technical Information
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Common Questions
How strong was the magnitude 3.8 earthquake near Nikolski, Alaska?
The magnitude 3.8 earthquake that struck 140 km ESE of Nikolski, Alaska on April 30, 2024 at 17:18 UTC had a depth of 10.0 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 3.8 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000mx70). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, April 30, 2024). M3.8 Earthquake 140 km ESE of Nikolski, Alaska — April 30, 2024. Retrieved July 15, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000mx70/