M3.3 Earthquake 58 km NNW of Petersville, Alaska — August 3, 2020
2020-08-03 21:01:55 UTC (2020-08-03) · approx. 11:01 AM UTC-10 local
On August 3, 2020 at 21:01 UTC, a magnitude 3.3 intermediate depth earthquake struck 58 km NNW of Petersville, Alaska, at a depth of 122.8 km and coordinates 63.0102°, -150.9961°.
Physical scale: An earthquake of magnitude 3.3 releases seismic energy equivalent to roughly 1.3 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 114 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-150.9961°E
Technical Information
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Common Questions
How strong was the magnitude 3.3 earthquake near Petersville, Alaska?
The magnitude 3.3 earthquake that struck 58 km NNW of Petersville, Alaska on August 3, 2020 at 21:01 UTC had a depth of 122.8 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 3.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak0209xklecb). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, August 3, 2020). M3.3 Earthquake 58 km NNW of Petersville, Alaska — August 3, 2020. Retrieved October 10, 2020 from https://www.earthquaketracker.org/earthquakes/event/ak0209xklecb/