M4.9 Earthquake 5 km NE of Ōmachi, Japan — April 18, 2026
2026-04-18 05:54:30 UTC (1 day ago)
Felt by 3 people across nearby locations.
On April 18, 2026 at 05:54 UTC, a magnitude 4.9 shallow crustal earthquake struck 5 km NE of Ōmachi, Japan, at a depth of 10.0 km and coordinates 36.5388°, 137.9099°. This earthquake was detected by 135 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 371, placing it among routine seismic activity.
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
137.9099°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.9 earthquake near Ōmachi, Japan?
The magnitude 4.9 earthquake that struck 5 km NE of Ōmachi, Japan on April 18, 2026 at 05:54 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 36.5388°, 137.9099°, which is 5 km NE of Ōmachi, 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.