M4.1 Earthquake 17 km SE of Kamaishi, Japan — June 12, 2025
2025-06-12 18:02:26 UTC (2025-06-12) · approx. 3:02 AM UTC+9 local
On June 12, 2025 at 18:02 UTC, a magnitude 4.1 shallow crustal earthquake struck 17 km SE of Kamaishi, Japan, at a depth of 50.7 km and coordinates 39.1743°, 142.0205°.
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
142.0205°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Kamaishi, Japan?
The magnitude 4.1 earthquake that struck 17 km SE of Kamaishi, Japan on June 12, 2025 at 18:02 UTC had a depth of 50.7 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: us6000qjwg). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, June 12, 2025). M4.1 Earthquake 17 km SE of Kamaishi, Japan — June 12, 2025. Retrieved August 22, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000qjwg/