M3.4 Earthquake 242 km SE of Chiniak, Alaska — April 14, 2023
2023-04-14 18:31:52 UTC (2023-04-14) · approx. 8:31 AM UTC-10 local
On April 14, 2023 at 18:31 UTC, a magnitude 3.4 shallow crustal earthquake struck 242 km SE of Chiniak, Alaska, at a depth of 14.6 km and coordinates 56.1715°, -149.2868°.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 1.9 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 134 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-149.2868°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near Chiniak, Alaska?
The magnitude 3.4 earthquake that struck 242 km SE of Chiniak, Alaska on April 14, 2023 at 18:31 UTC had a depth of 14.6 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 3.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000k4j1). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, April 14, 2023). M3.4 Earthquake 242 km SE of Chiniak, Alaska — April 14, 2023. Retrieved June 17, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000k4j1/