3.3

M3.3 Earthquake 125 km WSW of Adak, AlaskaApril 22, 2026

2026-04-22 11:11:29 UTC (15 hours ago)

On April 22, 2026 at 11:11 UTC, a magnitude 3.3 shallow crustal earthquake struck 125 km WSW of Adak, Alaska, at a depth of 4.8 km and coordinates 51.5808°, -178.3907°.

Map showing earthquake epicenter at 51.58°, -178.39°

Earthquake Details

Magnitude
3.3 ml
Depth
4.8 km
shallow crustal
Location
51.5808°N
-178.3907°E

Technical Information

Event ID
av94160663
Event Type
earthquake
Status
✓ Reviewed
Significance
171
Stations Used
13
Azimuthal Gap
190.0°
Min Station Distance
0.266°
RMS Residual
0.19 sec
Last Updated
2026-04-23 00:02:57 UTC

Common Questions

How strong was the magnitude 3.3 earthquake near Adak, Alaska?

The magnitude 3.3 earthquake that struck 125 km WSW of Adak, Alaska on April 22, 2026 at 11:11 UTC had a depth of 4.8 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 3.3 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.