4.4

M4.4 Earthquake 35 km E of Noda, JapanApril 21, 2026

2026-04-21 16:18:10 UTC (6 hours ago)

On April 21, 2026 at 16:18 UTC, a magnitude 4.4 shallow crustal earthquake struck 35 km E of Noda, Japan, at a depth of 50.4 km and coordinates 40.0783°, 142.2292°.

Map showing earthquake epicenter at 40.08°, 142.23°

Earthquake Details

Magnitude
4.4 mb
Depth
50.4 km
shallow crustal
Location
40.0783°N
142.2292°E

Technical Information

Event ID
us6000srv5
Event Type
earthquake
Status
✓ Reviewed
Significance
298
Stations Used
60
Azimuthal Gap
117.0°
Min Station Distance
1.138°
RMS Residual
0.73 sec
Last Updated
2026-04-21 18:01:00 UTC

Common Questions

How strong was the magnitude 4.4 earthquake near Noda, Japan?

The magnitude 4.4 earthquake that struck 35 km E of Noda, Japan on April 21, 2026 at 16:18 UTC had a depth of 50.4 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.

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.