M3.4 Earthquake 20 km SSW of Petersville, Alaska — April 18, 2024
2024-04-18 21:19:39 UTC (2024-04-18) · approx. 11:19 AM UTC-10 local
On April 18, 2024 at 21:19 UTC, a magnitude 3.4 shallow crustal earthquake struck 20 km SSW of Petersville, Alaska, at a depth of 68.5 km and coordinates 62.3152°, -150.8691°.
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
-150.8691°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near Petersville, Alaska?
The magnitude 3.4 earthquake that struck 20 km SSW of Petersville, Alaska on April 18, 2024 at 21:19 UTC had a depth of 68.5 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: ak02450m734y). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, April 18, 2024). M3.4 Earthquake 20 km SSW of Petersville, Alaska — April 18, 2024. Retrieved June 25, 2024 from https://www.earthquaketracker.org/earthquakes/event/ak02450m734y/