M4.3 Earthquake 93 km SE of Nemuro, Japan — June 21, 2025
2025-06-21 21:53:49 UTC (2025-06-21) · approx. 7:53 AM UTC+10 local
On June 21, 2025 at 21:53 UTC, a magnitude 4.3 shallow crustal earthquake struck 93 km SE of Nemuro, Japan, at a depth of 35.0 km and coordinates 42.7638°, 146.4289°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
146.4289°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Nemuro, Japan?
The magnitude 4.3 earthquake that struck 93 km SE of Nemuro, Japan on June 21, 2025 at 21:53 UTC had a depth of 35.0 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000qlp4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, June 21, 2025). M4.3 Earthquake 93 km SE of Nemuro, Japan — June 21, 2025. Retrieved September 2, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000qlp4/