4.5

M4.5 Earthquake in the Pagan region, Northern Mariana IslandsApril 22, 2026

2026-04-22 22:04:07 UTC (5 hours ago)

On April 22, 2026 at 22:04 UTC, a magnitude 4.5 deep-focus earthquake struck in the Pagan region, Northern Mariana Islands, at a depth of 363.4 km and coordinates 18.1152°, 145.2292°. This earthquake was detected by 68 seismic stations with good location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.

Map showing earthquake epicenter at 18.12°, 145.23°

Earthquake Details

Magnitude
4.5 mb
Depth
363.4 km
deep-focus
Location
18.1152°N
145.2292°E

Technical Information

Event ID
us6000ss74
Event Type
earthquake
Status
✓ Reviewed
Significance
312
Stations Used
68
Azimuthal Gap
95.0°
Min Station Distance
12.398°
RMS Residual
0.53 sec
Last Updated
2026-04-22 22:21:49 UTC

Common Questions

How strong was the magnitude 4.5 earthquake in the Pagan region, Northern Mariana Islands?

The magnitude 4.5 earthquake that struck in the Pagan region, Northern Mariana Islands on April 22, 2026 at 22:04 UTC had a depth of 363.4 km. For context, this was a light earthquake commonly felt near the epicenter.

Where did the earthquake occur?

The earthquake epicenter was located at 18.1152°, 145.2292°, which is in the Pagan region, Northern Mariana Islands.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 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.