M4.2 Earthquake near Rat Islands, Aleutian Islands, Alaska — April 12, 2022
2022-04-12 17:59:39 UTC (2022-04-12) · approx. 5:59 AM UTC+12 local
On April 12, 2022 at 17:59 UTC, a magnitude 4.2 shallow crustal earthquake struck near Rat Islands, Aleutian Islands, Alaska, at a depth of 35.0 km and coordinates 51.1793°, 178.7920°.0
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from submitted 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
178.7920°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Rat Islands, Aleutian Islands, Alaska?
The magnitude 4.2 earthquake that struck near Rat Islands, Aleutian Islands, Alaska on April 12, 2022 at 17:59 UTC had a depth of 35.0 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000h1ic). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, April 12, 2022). M4.2 Earthquake near Rat Islands, Aleutian Islands, Alaska — April 12, 2022. Retrieved June 20, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000h1ic/