M4.4 Earthquake 90 km ESE of Tomioka, Japan — August 23, 2026
2026-08-23 00:32:24 UTC (3 hours ago) · approx. 9:32 AM UTC+9 local
On August 23, 2026 at 00:32 UTC, a magnitude 4.4 shallow crustal earthquake struck 90 km ESE of Tomioka, Japan, at a depth of 24.1 km and coordinates 36.9495°, 141.9148°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
141.9148°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Tomioka, Japan?
The magnitude 4.4 earthquake that struck 90 km ESE of Tomioka, Japan on August 23, 2026 at 00:32 UTC had a depth of 24.1 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000tmw4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 23, 2026). M4.4 Earthquake 90 km ESE of Tomioka, Japan — August 23, 2026. Retrieved August 23, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tmw4/