M4.3 Earthquake 21 km SW of Uken, Japan — July 23, 2025
2025-07-23 22:55:33 UTC (2025-07-23) · approx. 7:55 AM UTC+9 local
On July 23, 2025 at 22:55 UTC, a magnitude 4.3 shallow crustal earthquake struck 21 km SW of Uken, Japan, at a depth of 59.0 km and coordinates 28.1456°, 129.1021°.
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
129.1021°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near Uken, Japan?
The magnitude 4.3 earthquake that struck 21 km SW of Uken, Japan on July 23, 2025 at 22:55 UTC had a depth of 59.0 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.
Actions
Location
Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000quid). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, July 23, 2025). M4.3 Earthquake 21 km SW of Uken, Japan — July 23, 2025. Retrieved October 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000quid/