M4.9 Earthquake northwest of the Kuril Islands — March 28, 2025
2025-03-28 11:57:11 UTC (2025-03-28) · approx. 9:57 PM UTC+10 local
On March 28, 2025 at 11:57 UTC, a magnitude 4.9 deep-focus earthquake struck northwest of the Kuril Islands, at a depth of 425.3 km and coordinates 47.9507°, 147.2037°. This earthquake was detected by 160 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
147.2037°E
Technical Information
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Common Questions
How strong was the magnitude 4.9 earthquake northwest of the Kuril Islands?
The magnitude 4.9 earthquake that struck northwest of the Kuril Islands on March 28, 2025 at 11:57 UTC had a depth of 425.3 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 47.9507°, 147.2037°, which is northwest of the Kuril Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000pnc1). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, March 28, 2025). M4.9 Earthquake northwest of the Kuril Islands — March 28, 2025. Retrieved June 6, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pnc1/