M3.4 Earthquake 72 km N of White Mountain, Alaska — December 19, 2021
2021-12-19 15:32:39 UTC (2021-12-19) · approx. 4:32 AM UTC-11 local
On December 19, 2021 at 15:32 UTC, a magnitude 3.4 shallow crustal earthquake struck 72 km N of White Mountain, Alaska, at a depth of 10.0 km and coordinates 65.3233°, -163.1376°.
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
-163.1376°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.4 earthquake near White Mountain, Alaska?
The magnitude 3.4 earthquake that struck 72 km N of White Mountain, Alaska on December 19, 2021 at 15:32 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 3.4 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 3.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000gdm4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 19, 2021). M3.4 Earthquake 72 km N of White Mountain, Alaska — December 19, 2021. Retrieved March 1, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000gdm4/