M3.1 Earthquake 42 km WNW of Ninilchik, Alaska — November 12, 2020
2020-11-12 19:52:43 UTC (2020-11-12) · approx. 9:52 AM UTC-10 local
On November 12, 2020 at 19:52 UTC, a magnitude 3.1 intermediate depth earthquake struck 42 km WNW of Ninilchik, Alaska, at a depth of 88.2 km and coordinates 60.1363°, -152.4103°.
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
-152.4103°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Ninilchik, Alaska?
The magnitude 3.1 earthquake that struck 42 km WNW of Ninilchik, Alaska on November 12, 2020 at 19:52 UTC had a depth of 88.2 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: ak020ekkzhli). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, November 12, 2020). M3.1 Earthquake 42 km WNW of Ninilchik, Alaska — November 12, 2020. Retrieved January 27, 2021 from https://www.earthquaketracker.org/earthquakes/event/ak020ekkzhli/