3.7

M3.7 Earthquake 234 km ESE of Attu Station, AlaskaApril 16, 2026

2026-04-16 17:13:26 UTC (2 days ago)

On April 16, 2026 at 17:13 UTC, a magnitude 3.7 shallow crustal earthquake struck 234 km ESE of Attu Station, Alaska, at a depth of 10.0 km and coordinates 51.9375°, 176.2885°.

Map showing earthquake epicenter at 51.94°, 176.29°

Earthquake Details

Magnitude
3.7 mb
Depth
10.0 km
shallow crustal
Location
51.9375°N
176.2885°E
Intensity (MMI)
1.7
weak

Technical Information

Event ID
us6000sqnz
Event Type
earthquake
Status
✓ Reviewed
Significance
211
Stations Used
27
Azimuthal Gap
195.0°
Min Station Distance
1.376°
RMS Residual
0.59 sec
Last Updated
2026-04-18 19:29:44 UTC

Common Questions

How strong was the magnitude 3.7 earthquake near Attu Station, Alaska?

The magnitude 3.7 earthquake that struck 234 km ESE of Attu Station, Alaska on April 16, 2026 at 17:13 UTC had a depth of 10.0 km. For context, this was a minor earthquake typically detected only by instruments.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.7 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.