M4.3 Earthquake 130 km ENE of Atka, Alaska — November 10, 2020
2020-11-10 19:45:09 UTC (2020-11-10) · approx. 8:45 AM UTC-11 local
On November 10, 2020 at 19:45 UTC, a magnitude 4.3 intermediate depth earthquake struck 130 km ENE of Atka, Alaska, at a depth of 137.6 km and coordinates 52.6309°, -172.4218°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-172.4218°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Atka, Alaska?
The magnitude 4.3 earthquake that struck 130 km ENE of Atka, Alaska on November 10, 2020 at 19:45 UTC had a depth of 137.6 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000cczf). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, November 10, 2020). M4.3 Earthquake 130 km ENE of Atka, Alaska — November 10, 2020. Retrieved January 26, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000cczf/