M3.0 Earthquake 27 km W of Cantwell, Alaska — June 4, 2021
2021-06-04 22:40:28 UTC (2021-06-04) · approx. 12:40 PM UTC-10 local
On June 4, 2021 at 22:40 UTC, a magnitude 3.0 intermediate depth earthquake struck 27 km W of Cantwell, Alaska, at a depth of 100.0 km and coordinates 63.3806°, -149.5055°.
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
-149.5055°E
Technical Information
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Common Questions
How strong was the magnitude 3.0 earthquake near Cantwell, Alaska?
The magnitude 3.0 earthquake that struck 27 km W of Cantwell, Alaska on June 4, 2021 at 22:40 UTC had a depth of 100.0 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: ak02174pmync). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, June 4, 2021). M3.0 Earthquake 27 km W of Cantwell, Alaska — June 4, 2021. Retrieved August 24, 2021 from https://www.earthquaketracker.org/earthquakes/event/ak02174pmync/