M3.2 Earthquake 87 km SW of Atka, Alaska — March 28, 2022
2022-03-28 21:33:25 UTC (2022-03-28) · approx. 9:33 AM UTC-12 local
On March 28, 2022 at 21:33 UTC, a magnitude 3.2 shallow crustal earthquake struck 87 km SW of Atka, Alaska, at a depth of 23.9 km and coordinates 51.6223°, -175.0617°.
Physical scale: An earthquake of magnitude 3.2 releases seismic energy equivalent to roughly 951 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 97 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-175.0617°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.2 earthquake near Atka, Alaska?
The magnitude 3.2 earthquake that struck 87 km SW of Atka, Alaska on March 28, 2022 at 21:33 UTC had a depth of 23.9 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 3.2 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 3.2 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us7000h88x). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, March 28, 2022). M3.2 Earthquake 87 km SW of Atka, Alaska — March 28, 2022. Retrieved June 4, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000h88x/