M4.7 Earthquake 25 km N of Mutsu, Japan — September 13, 2026
2026-09-13 08:31:15 UTC (1 hour ago) · approx. 5:31 PM UTC+9 local
On September 13, 2026 at 08:31 UTC, a magnitude 4.7 intermediate depth earthquake struck 25 km N of Mutsu, Japan, at a depth of 120.4 km and coordinates 41.5125°, 141.2715°. This earthquake was detected by 69 seismic stations with good location accuracy and was assigned a USGS significance rating of 340, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 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
141.2715°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.7 earthquake near Mutsu, Japan?
The magnitude 4.7 earthquake that struck 25 km N of Mutsu, Japan on September 13, 2026 at 08:31 UTC had a depth of 120.4 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 41.5125°, 141.2715°, which is 25 km N of Mutsu, Japan. View all earthquakes in Japan.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 earthquakes can continue for several days 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 4.7 event is significantly smaller than that historical record.
Actions
Location
Authoritative source: USGS event page (event ID: us7000th5d). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 13, 2026). M4.7 Earthquake 25 km N of Mutsu, Japan — September 13, 2026. Retrieved September 13, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000th5d/