M3.5 Earthquake 63 km NNW of Dutch Harbor, Alaska — December 8, 2021
2021-12-08 23:02:48 UTC (2021-12-08) · approx. 12:02 PM UTC-11 local
On December 8, 2021 at 23:02 UTC, a magnitude 3.5 intermediate depth earthquake struck 63 km NNW of Dutch Harbor, Alaska, at a depth of 183.4 km and coordinates 54.4492°, -166.7414°.
Physical scale: An earthquake of magnitude 3.5 releases seismic energy equivalent to roughly 2.7 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 157 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-166.7414°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.5 earthquake near Dutch Harbor, Alaska?
The magnitude 3.5 earthquake that struck 63 km NNW of Dutch Harbor, Alaska on December 8, 2021 at 23:02 UTC had a depth of 183.4 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 3.5 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 3.5 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000gap3). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 8, 2021). M3.5 Earthquake 63 km NNW of Dutch Harbor, Alaska — December 8, 2021. Retrieved February 12, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000gap3/