M4.4 Earthquake 17 km WSW of China, Japan — August 15, 2025
2025-08-15 23:28:06 UTC (2025-08-15) · approx. 8:28 AM UTC+9 local
On August 15, 2025 at 23:28 UTC, a magnitude 4.4 shallow crustal earthquake struck 17 km WSW of China, Japan, at a depth of 49.9 km and coordinates 27.2767°, 128.3977°.
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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
128.3977°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near China, Japan?
The magnitude 4.4 earthquake that struck 17 km WSW of China, Japan on August 15, 2025 at 23:28 UTC had a depth of 49.9 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: us6000r1iy). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, August 15, 2025). M4.4 Earthquake 17 km WSW of China, Japan — August 15, 2025. Retrieved November 4, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000r1iy/