M4.0 Earthquake 6 km ENE of Sakai, Japan — June 30, 2025
2025-06-30 16:13:08 UTC (2025-06-30) · approx. 1:13 AM UTC+9 local
On June 30, 2025 at 16:13 UTC, a magnitude 4.0 shallow crustal earthquake struck 6 km ENE of Sakai, Japan, at a depth of 66.1 km and coordinates 36.1168°, 139.8707°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
139.8707°E
Technical Information
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Common Questions
How strong was the magnitude 4.0 earthquake near Sakai, Japan?
The magnitude 4.0 earthquake that struck 6 km ENE of Sakai, Japan on June 30, 2025 at 16:13 UTC had a depth of 66.1 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000qbv6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, June 30, 2025). M4.0 Earthquake 6 km ENE of Sakai, Japan — June 30, 2025. Retrieved September 4, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000qbv6/