M4.1 Earthquake 17 km ESE of Hitachi, Japan — August 25, 2023
2023-08-25 22:02:11 UTC (2023-08-25) · approx. 7:02 AM UTC+9 local
On August 25, 2023 at 22:02 UTC, a magnitude 4.1 shallow crustal earthquake struck 17 km ESE of Hitachi, Japan, at a depth of 61.7 km and coordinates 36.5371°, 140.8287°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
140.8287°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Hitachi, Japan?
The magnitude 4.1 earthquake that struck 17 km ESE of Hitachi, Japan on August 25, 2023 at 22:02 UTC had a depth of 61.7 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 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000kse3). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 25, 2023). M4.1 Earthquake 17 km ESE of Hitachi, Japan — August 25, 2023. Retrieved October 28, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kse3/