M4.0 Earthquake 158 km E of Korsakov, Russia — April 29, 2025
2025-04-29 20:55:31 UTC (2025-04-29) · approx. 6:55 AM UTC+10 local
On April 29, 2025 at 20:55 UTC, a magnitude 4.0 deep-focus earthquake struck 158 km E of Korsakov, Russia, at a depth of 388.2 km and coordinates 46.8697°, 144.8181°.
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
144.8181°E
Technical Information
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Common Questions
How strong was the magnitude 4.0 earthquake near Korsakov, Russia?
The magnitude 4.0 earthquake that struck 158 km E of Korsakov, Russia on April 29, 2025 at 20:55 UTC had a depth of 388.2 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: us7000pvym). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 29, 2025). M4.0 Earthquake 158 km E of Korsakov, Russia — April 29, 2025. Retrieved July 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pvym/