M3.1 Earthquake 21 km SE of Atka, Alaska — December 23, 2023
2023-12-23 19:06:44 UTC (2023-12-23) · approx. 7:06 AM UTC-12 local
On December 23, 2023 at 19:06 UTC, a magnitude 3.1 intermediate depth earthquake struck 21 km SE of Atka, Alaska, at a depth of 134.2 km and coordinates 52.0847°, -173.9475°.
Physical scale: An earthquake of magnitude 3.1 releases seismic energy equivalent to roughly 674 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 83 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-173.9475°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.1 earthquake near Atka, Alaska?
The magnitude 3.1 earthquake that struck 21 km SE of Atka, Alaska on December 23, 2023 at 19:06 UTC had a depth of 134.2 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 3.1 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000m2st). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, December 23, 2023). M3.1 Earthquake 21 km SE of Atka, Alaska — December 23, 2023. Retrieved February 27, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000m2st/