3.5

M3.5 Earthquake 16 km WNW of Atka, AlaskaApril 24, 2026

2026-04-24 16:48:50 UTC (5 hours ago)

On April 24, 2026 at 16:48 UTC, a magnitude 3.5 intermediate depth earthquake struck 16 km WNW of Atka, Alaska, at a depth of 145.4 km and coordinates 52.2600°, -174.4110°.

Map showing earthquake epicenter at 52.26°, -174.41°

Earthquake Details

Magnitude
3.5 ml
Depth
145.4 km
intermediate depth
Location
52.2600°N
-174.4110°E
Intensity (MMI)
1.0
weak

Technical Information

Event ID
aka2026iasnnl
Event Type
earthquake
Status
✓ Reviewed
Significance
188
Stations Used
47
Azimuthal Gap
139.0°
Min Station Distance
0.100°
RMS Residual
0.40 sec
Last Updated
2026-04-24 18:23:12 UTC

Common Questions

How strong was the magnitude 3.5 earthquake near Atka, Alaska?

The magnitude 3.5 earthquake that struck 16 km WNW of Atka, Alaska on April 24, 2026 at 16:48 UTC had a depth of 145.4 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 3.5 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.