M4.4 Earthquake 51 km ESE of Tsunō, Japan — August 18, 2025
2025-08-18 22:17:22 UTC (2025-08-18) · approx. 7:17 AM UTC+9 local
On August 18, 2025 at 22:17 UTC, a magnitude 4.4 shallow crustal earthquake struck 51 km ESE of Tsunō, Japan, at a depth of 35.0 km and coordinates 32.1510°, 132.0990°.
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
132.0990°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Tsunō, Japan?
The magnitude 4.4 earthquake that struck 51 km ESE of Tsunō, Japan on August 18, 2025 at 22:17 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 4.4 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: us7000qvi5). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, August 18, 2025). M4.4 Earthquake 51 km ESE of Tsunō, Japan — August 18, 2025. Retrieved November 4, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000qvi5/