M3.0 Earthquake 283 km W of Adak, Alaska — July 11, 2020
2020-07-11 18:01:19 UTC (2020-07-11) · approx. 6:01 AM UTC+12 local
On July 11, 2020 at 18:01 UTC, a magnitude 3.0 intermediate depth earthquake struck 283 km W of Adak, Alaska, at a depth of 79.2 km and coordinates 51.6283°, 179.2768°.
Physical scale: An earthquake of magnitude 3.0 releases seismic energy equivalent to roughly 477 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 71 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
179.2768°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Adak, Alaska?
The magnitude 3.0 earthquake that struck 283 km W of Adak, Alaska on July 11, 2020 at 18:01 UTC had a depth of 79.2 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 3.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.0 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000b341). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, July 11, 2020). M3.0 Earthquake 283 km W of Adak, Alaska — July 11, 2020. Retrieved September 19, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000b341/