M4.2 Earthquake 256 km NW of Attu Station, Alaska — January 2, 2022
2022-01-02 14:36:05 UTC (2022-01-02) · approx. 1:36 AM UTC+11 local
On January 2, 2022 at 14:36 UTC, a magnitude 4.2 shallow crustal earthquake struck 256 km NW of Attu Station, Alaska, at a depth of 10.0 km and coordinates 54.5321°, 170.5365°.
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.
Earthquake Details
170.5365°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake near Attu Station, Alaska?
The magnitude 4.2 earthquake that struck 256 km NW of Attu Station, Alaska on January 2, 2022 at 14:36 UTC had a depth of 10.0 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: us7000gbe2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, January 2, 2022). M4.2 Earthquake 256 km NW of Attu Station, Alaska — January 2, 2022. Retrieved March 12, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000gbe2/