M5.1 Earthquake 88 km NNW of Uken, Japan — September 22, 2026
2026-09-22 10:46:22 UTC (2 hours ago) · approx. 7:46 PM UTC+9 local
On September 22, 2026 at 10:46 UTC, a magnitude 5.1 shallow crustal earthquake struck 88 km NNW of Uken, Japan, at a depth of 10.0 km and coordinates 29.0367°, 128.8944°. This earthquake was detected by 67 seismic stations with good location accuracy and was assigned a USGS significance rating of 400, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Japan, a region characterized by the intersection of four tectonic plates — Pacific, Philippine Sea, Eurasian, and North American — creating multiple subduction zones. The nearest mapped fault system is the Japan Trench. View all earthquakes in Japan.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
128.8944°E
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Common Questions
How strong was the magnitude 5.1 earthquake near Uken, Japan?
The magnitude 5.1 earthquake that struck 88 km NNW of Uken, Japan on September 22, 2026 at 10:46 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 29.0367°, 128.8944°, which is 88 km NNW of Uken, Japan. View all earthquakes in Japan.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Has Japan had earthquakes this big before?
The largest recorded earthquake in Japan was the M9.1 Tohoku earthquake of March 11, 2011. Today's magnitude 5.1 event is significantly smaller than that historical record.
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Authoritative source: USGS event page (event ID: us7000tj4y). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 22, 2026). M5.1 Earthquake 88 km NNW of Uken, Japan — September 22, 2026. Retrieved September 22, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000tj4y/