M4.0 Earthquake 41 km ENE of Atka, Alaska — August 23, 2024
2024-08-23 21:08:38 UTC (2024-08-23) · approx. 9:08 AM UTC-12 local
On August 23, 2024 at 21:08 UTC, a magnitude 4.0 intermediate depth earthquake struck 41 km ENE of Atka, Alaska, at a depth of 145.8 km and coordinates 52.3454°, -173.6406°.
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.
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
-173.6406°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.0 earthquake near Atka, Alaska?
The magnitude 4.0 earthquake that struck 41 km ENE of Atka, Alaska on August 23, 2024 at 21:08 UTC had a depth of 145.8 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: us7000n93k). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, August 23, 2024). M4.0 Earthquake 41 km ENE of Atka, Alaska — August 23, 2024. Retrieved November 2, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000n93k/