M4.1 Earthquake near Rat Islands, Aleutian Islands, Alaska — July 19, 2025
2025-07-19 21:45:07 UTC (2025-07-19) · approx. 9:45 AM UTC+12 local
On July 19, 2025 at 21:45 UTC, a magnitude 4.1 intermediate depth earthquake struck near Rat Islands, Aleutian Islands, Alaska, at a depth of 153.8 km and coordinates 52.0022°, 177.5731°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
177.5731°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Rat Islands, Aleutian Islands, Alaska?
The magnitude 4.1 earthquake that struck near Rat Islands, Aleutian Islands, Alaska on July 19, 2025 at 21:45 UTC had a depth of 153.8 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 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000qx0x). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, July 19, 2025). M4.1 Earthquake near Rat Islands, Aleutian Islands, Alaska — July 19, 2025. Retrieved October 3, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000qx0x/