M4.9 Earthquake east of the Kuril Islands — July 25, 2023
2023-07-25 13:51:43 UTC (2023-07-25) · approx. 11:51 PM UTC+10 local
On July 25, 2023 at 13:51 UTC, a magnitude 4.9 shallow crustal earthquake struck east of the Kuril Islands, at a depth of 10.0 km and coordinates 47.9222°, 155.2943°. This earthquake was detected by 176 seismic stations with good 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
155.2943°E
Technical Information
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Common Questions
How strong was the magnitude 4.9 earthquake east of the Kuril Islands?
The magnitude 4.9 earthquake that struck east of the Kuril Islands on July 25, 2023 at 13:51 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 47.9222°, 155.2943°, which is east 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: us7000ki7j). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 25, 2023). M4.9 Earthquake east of the Kuril Islands — July 25, 2023. Retrieved September 30, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000ki7j/