3.4

M3.4 Earthquake 186 km WSW of Adak, AlaskaApril 17, 2026

2026-04-17 13:13:15 UTC (2 days ago)

On April 17, 2026 at 13:13 UTC, a magnitude 3.4 shallow crustal earthquake struck 186 km WSW of Adak, Alaska, at a depth of 27.5 km and coordinates 51.2114°, -179.1057°.

Map showing earthquake epicenter at 51.21°, -179.11°

Earthquake Details

Magnitude
3.4 ml
Depth
27.5 km
shallow crustal
Location
51.2114°N
-179.1057°E
Intensity (MMI)
3.3
light

Technical Information

Event ID
us6000sqzb
Event Type
earthquake
Status
✓ Reviewed
Significance
178
Stations Used
19
Azimuthal Gap
210.0°
Min Station Distance
0.388°
RMS Residual
0.83 sec
Last Updated
2026-04-18 13:03:09 UTC

Common Questions

How strong was the magnitude 3.4 earthquake near Adak, Alaska?

The magnitude 3.4 earthquake that struck 186 km WSW of Adak, Alaska on April 17, 2026 at 13:13 UTC had a depth of 27.5 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 3.4 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.