M3.4 Earthquake 121 km SSE of Old Harbor, Alaska — July 22, 2024
2024-07-22 22:08:56 UTC (2024-07-22) · approx. 12:08 PM UTC-10 local
On July 22, 2024 at 22:08 UTC, a magnitude 3.4 shallow crustal earthquake struck 121 km SSE of Old Harbor, Alaska, at a depth of 8.3 km and coordinates 56.2030°, -152.4994°.
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
-152.4994°E
Technical Information
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Common Questions
How strong was the magnitude 3.4 earthquake near Old Harbor, Alaska?
The magnitude 3.4 earthquake that struck 121 km SSE of Old Harbor, Alaska on July 22, 2024 at 22:08 UTC had a depth of 8.3 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: ak0249dqs5fp). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, July 22, 2024). M3.4 Earthquake 121 km SSE of Old Harbor, Alaska — July 22, 2024. Retrieved October 8, 2024 from https://www.earthquaketracker.org/earthquakes/event/ak0249dqs5fp/