M1.6 earthquake 77 km WNW of Tyonek, Alaska

A magnitude 1.6 earthquake struck 77 km WNW of Tyonek, Alaska on Thu, Jul 24, 2025, 5:55 PM AKDT (01:55 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.2 36 km SSW of Skwentna, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
1.6	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.21	ML, local (Richter)	AV	Final · ±0.265399726120693 · 13 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 159 in the 60 days after this one and 121 in the 30 days before it.

The first 60 of 159.

From the USGS Earthquake Hazards Program and its partner networks, event ak0259gpmpqa (also filed as av93687276). Read Sat, Oct 3, 2026, 5:02 PM UTC.