M4.9 Earthquake 1 km SW of Kiryū, Japan — March 15, 2026
2026-03-15 05:06:06 UTC (2026-03-15) · approx. 2:06 PM UTC+9 local
Felt by 14 people across nearby locations.
On March 15, 2026 at 05:06 UTC, a magnitude 4.9 intermediate depth earthquake struck 1 km SW of Kiryū, Japan, at a depth of 95.6 km and coordinates 36.3911°, 139.3174°. This earthquake was detected by 57 seismic stations with good location accuracy and was assigned a USGS significance rating of 374, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 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
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 14 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
139.3174°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.9 earthquake near Kiryū, Japan?
The magnitude 4.9 earthquake that struck 1 km SW of Kiryū, Japan on March 15, 2026 at 05:06 UTC had a depth of 95.6 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 36.3911°, 139.3174°, which is 1 km SW of Kiryū, Japan. View all earthquakes in Japan.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 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 4.9 event is significantly smaller than that historical record.
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. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: us6000sgeb). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, March 15, 2026). M4.9 Earthquake 1 km SW of Kiryū, Japan — March 15, 2026. Retrieved May 18, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000sgeb/