M1.7 earthquake 13 km S of Tyonek, Alaska

A magnitude 1.7 earthquake struck 13 km S of Tyonek, Alaska on Thu, Dec 20, 2018, 2:50 AM AKST (11:50 UTC), 66 km (41 mi) below the surface.

A larger quake followed: M5.0 7 km SSE of Point MacKenzie, Alaska. This one was a foreshock.

Map

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

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: at least 202 in the 60 days after this one and at least 200 in the 30 days before it.

The first 60 of at least 202.

From the USGS Earthquake Hazards Program and its partner networks, event ak018g9n3fr2 (also filed as ak20523814). Read Sat, Oct 3, 2026, 9:55 PM UTC.