M4.0 Earthquake 74 km SSE of Akkeshi, Japan — April 10, 2025
2025-04-10 21:52:55 UTC (2025-04-10) · approx. 7:52 AM UTC+10 local
On April 10, 2025 at 21:52 UTC, a magnitude 4.0 shallow crustal earthquake struck 74 km SSE of Akkeshi, Japan, at a depth of 48.0 km and coordinates 42.4689°, 145.3410°.
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
145.3410°E
Technical Information
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Common Questions
How strong was the magnitude 4.0 earthquake near Akkeshi, Japan?
The magnitude 4.0 earthquake that struck 74 km SSE of Akkeshi, Japan on April 10, 2025 at 21:52 UTC had a depth of 48.0 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 4.0 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: us7000put6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, April 10, 2025). M4.0 Earthquake 74 km SSE of Akkeshi, Japan — April 10, 2025. Retrieved June 14, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000put6/