M4.4 Earthquake 58 km SSE of Nikolski, Alaska — December 11, 2023
2023-12-11 20:17:47 UTC (2023-12-11) · approx. 9:17 AM UTC-11 local
On December 11, 2023 at 20:17 UTC, a magnitude 4.4 shallow crustal earthquake struck 58 km SSE of Nikolski, Alaska, at a depth of 40.2 km and coordinates 52.4774°, -168.4559°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-168.4559°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Nikolski, Alaska?
The magnitude 4.4 earthquake that struck 58 km SSE of Nikolski, Alaska on December 11, 2023 at 20:17 UTC had a depth of 40.2 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: usd001097y). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, December 11, 2023). M4.4 Earthquake 58 km SSE of Nikolski, Alaska — December 11, 2023. Retrieved December 11, 2023 from https://www.earthquaketracker.org/earthquakes/event/usd001097y/