M4.1 Earthquake 41 km ENE of Hachinohe, Japan — November 29, 2025
2025-11-29 23:03:37 UTC (2025-11-29) · approx. 8:03 AM UTC+9 local
On November 29, 2025 at 23:03 UTC, a magnitude 4.1 shallow crustal earthquake struck 41 km ENE of Hachinohe, Japan, at a depth of 56.3 km and coordinates 40.5884°, 141.9801°.
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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 6.9 mainshock that occurred 18 days ago 33 km ENE of Noda, Japan. Since the mainshock, the USGS has recorded 6 aftershocks in this area. Aftershock activity is expected to continue for weeks to months as stresses on surrounding faults redistribute.
Earthquake Details
141.9801°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Hachinohe, Japan?
The magnitude 4.1 earthquake that struck 41 km ENE of Hachinohe, Japan on November 29, 2025 at 23:03 UTC had a depth of 56.3 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.
Is this the same earthquake as the M6.9 one earlier?
No. This magnitude 4.1 earthquake is an aftershock of the larger magnitude 6.9 mainshock that occurred earlier 33 km ENE of Noda, Japan. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks.
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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: us6000rvh8). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, November 29, 2025). M4.1 Earthquake 41 km ENE of Hachinohe, Japan — November 29, 2025. Retrieved February 25, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rvh8/