M4.0 Earthquake 84 km NNW of Atka, Alaska — January 9, 2024
2024-01-09 16:43:06 UTC (2024-01-09) · approx. 4:43 AM UTC-12 local
On January 9, 2024 at 16:43 UTC, a magnitude 4.0 intermediate depth earthquake struck 84 km NNW of Atka, Alaska, at a depth of 199.6 km and coordinates 52.8528°, -174.8253°.
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.
Earthquake Details
-174.8253°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 84 km NNW of Atka, Alaska on January 9, 2024 at 16:43 UTC had a depth of 199.6 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: us6000m49i). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, January 9, 2024). M4.0 Earthquake 84 km NNW of Atka, Alaska — January 9, 2024. Retrieved March 16, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000m49i/