M3.1 Earthquake 58 km WNW of Elfin Cove, Alaska — April 5, 2021
2021-04-05 23:56:35 UTC (2021-04-05) · approx. 2:56 PM UTC-9 local
On April 5, 2021 at 23:56 UTC, a magnitude 3.1 shallow crustal earthquake struck 58 km WNW of Elfin Cove, Alaska, at a depth of 2.2 km and coordinates 58.4696°, -137.2002°.
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
-137.2002°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.1 earthquake near Elfin Cove, Alaska?
The magnitude 3.1 earthquake that struck 58 km WNW of Elfin Cove, Alaska on April 5, 2021 at 23:56 UTC had a depth of 2.2 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.
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Understanding This Data
Magnitude 3.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak0214di30qk). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 5, 2021). M3.1 Earthquake 58 km WNW of Elfin Cove, Alaska — April 5, 2021. Retrieved June 12, 2021 from https://www.earthquaketracker.org/earthquakes/event/ak0214di30qk/