M3.1 Earthquake 72 km WNW of Tyonek, Alaska — April 19, 2022
2022-04-19 21:29:51 UTC (2022-04-19) · approx. 11:29 AM UTC-10 local
On April 19, 2022 at 21:29 UTC, a magnitude 3.1 intermediate depth earthquake struck 72 km WNW of Tyonek, Alaska, at a depth of 129.3 km and coordinates 61.2972°, -152.3931°.
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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 3 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-152.3931°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.1 earthquake near Tyonek, Alaska?
The magnitude 3.1 earthquake that struck 72 km WNW of Tyonek, Alaska on April 19, 2022 at 21:29 UTC had a depth of 129.3 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: ak02250m993y). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, April 19, 2022). M3.1 Earthquake 72 km WNW of Tyonek, Alaska — April 19, 2022. Retrieved June 26, 2022 from https://www.earthquaketracker.org/earthquakes/event/ak02250m993y/