M3.1 Earthquake 210 km W of Adak, Alaska — July 14, 2020
2020-07-14 22:16:31 UTC (2020-07-14) · approx. 10:16 AM UTC-12 local
On July 14, 2020 at 22:16 UTC, a magnitude 3.1 intermediate depth earthquake struck 210 km W of Adak, Alaska, at a depth of 204.8 km and coordinates 51.8811°, -179.6920°.
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
-179.6920°E
Technical Information
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Common Questions
How strong was the magnitude 3.1 earthquake near Adak, Alaska?
The magnitude 3.1 earthquake that struck 210 km W of Adak, Alaska on July 14, 2020 at 22:16 UTC had a depth of 204.8 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: us6000b5r0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, July 14, 2020). M3.1 Earthquake 210 km W of Adak, Alaska — July 14, 2020. Retrieved September 19, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000b5r0/