M4.1 Earthquake 81 km NE of Esashi, Japan — October 13, 2026
2026-10-13 00:35:58 UTC (3 hours ago) · approx. 10:35 AM UTC+10 local
On October 13, 2026 at 00:35 UTC, a magnitude 4.1 intermediate depth earthquake struck 81 km NE of Esashi, Japan, at a depth of 277.1 km and coordinates 45.3536°, 143.4423°.
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
143.4423°E
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Common Questions
How strong was the magnitude 4.1 earthquake near Esashi, Japan?
The magnitude 4.1 earthquake that struck 81 km NE of Esashi, Japan on October 13, 2026 at 00:35 UTC had a depth of 277.1 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 4.1 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: us6000u1x7). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 13, 2026). M4.1 Earthquake 81 km NE of Esashi, Japan — October 13, 2026. Retrieved October 13, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000u1x7/