M3.7 Earthquake 62 km SE of King Salmon, Alaska — August 16, 2023
2023-08-16 20:49:01 UTC (2023-08-16) · approx. 10:49 AM UTC-10 local
On August 16, 2023 at 20:49 UTC, a magnitude 3.7 intermediate depth earthquake struck 62 km SE of King Salmon, Alaska, at a depth of 154.4 km and coordinates 58.2292°, -156.0424°.
Physical scale: An earthquake of magnitude 3.7 releases seismic energy equivalent to roughly 5.4 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 215 m — a useful intuition for the size of the slip patch on the fault.
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Earthquake Details
-156.0424°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.7 earthquake near King Salmon, Alaska?
The magnitude 3.7 earthquake that struck 62 km SE of King Salmon, Alaska on August 16, 2023 at 20:49 UTC had a depth of 154.4 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 3.7 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.7 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak023aheqaue). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 16, 2023). M3.7 Earthquake 62 km SE of King Salmon, Alaska — August 16, 2023. Retrieved October 27, 2023 from https://www.earthquaketracker.org/earthquakes/event/ak023aheqaue/