M4.2 Earthquake 87 km SE of Nemuro, Japan — June 28, 2025
2025-06-28 23:15:23 UTC (2025-06-28) · approx. 9:15 AM UTC+10 local
On June 28, 2025 at 23:15 UTC, a magnitude 4.2 shallow crustal earthquake struck 87 km SE of Nemuro, Japan, at a depth of 44.1 km and coordinates 42.8478°, 146.4327°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
146.4327°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake near Nemuro, Japan?
The magnitude 4.2 earthquake that struck 87 km SE of Nemuro, Japan on June 28, 2025 at 23:15 UTC had a depth of 44.1 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000q9f9). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, June 28, 2025). M4.2 Earthquake 87 km SE of Nemuro, Japan — June 28, 2025. Retrieved September 4, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000q9f9/