M4.0 Earthquake 122 km SE of Chignik, Alaska — April 1, 2024
2024-04-01 19:29:43 UTC (2024-04-01) · approx. 9:29 AM UTC-10 local
On April 1, 2024 at 19:29 UTC, a magnitude 4.0 shallow crustal earthquake struck 122 km SE of Chignik, Alaska, at a depth of 15.2 km and coordinates 55.4330°, -157.1926°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-157.1926°E
Technical Information
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Common Questions
How strong was the magnitude 4.0 earthquake near Chignik, Alaska?
The magnitude 4.0 earthquake that struck 122 km SE of Chignik, Alaska on April 1, 2024 at 19:29 UTC had a depth of 15.2 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: ak02448gxh1d). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, April 1, 2024). M4.0 Earthquake 122 km SE of Chignik, Alaska — April 1, 2024. Retrieved June 12, 2024 from https://www.earthquaketracker.org/earthquakes/event/ak02448gxh1d/