M4.4 Earthquake 54 km ESE of Onagawa Chō, Japan — December 3, 2025
2025-12-03 14:41:01 UTC (2025-12-03) · approx. 11:41 PM UTC+9 local
On December 3, 2025 at 14:41 UTC, a magnitude 4.4 shallow crustal earthquake struck 54 km ESE of Onagawa Chō, Japan, at a depth of 57.6 km and coordinates 38.3161°, 142.0482°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
142.0482°E
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Common Questions
How strong was the magnitude 4.4 earthquake near Onagawa Chō, Japan?
The magnitude 4.4 earthquake that struck 54 km ESE of Onagawa Chō, Japan on December 3, 2025 at 14:41 UTC had a depth of 57.6 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000rvzy). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, December 3, 2025). M4.4 Earthquake 54 km ESE of Onagawa Chō, Japan — December 3, 2025. Retrieved March 4, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rvzy/