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M1.6 Depth: 77.0 km

M1.6 Earthquake near 37 km W of Tyonek, Alaska (United States)

UTC time: 2025-12-20 15:06:50 UTC Local time: —

About this earthquake

On December 20, 2025 at 15:06 UTC, a magnitude M1.6 earthquake occurred near 37 km W of Tyonek, Alaska (United States). At around 77 km, the focal depth places this among intermediate-depth events. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: 223 earthquakes were recorded in the past 24 hours, the strongest reaching M6.0.

Details

Magnitude
M1.6
Depth
77.0 km
UTC time
2025-12-20 15:06:50 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
61.00800, -151.81400
Temperature
-9.6°C

Map

Depth profile

Depth profile Depth: 77 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 77 km
Intermediate
77 km
77 km — deeper than the regional average (15.7 km)
Regional average: 15.7 km
Why depth matters

Intermediate-depth quakes are felt across a wider area but usually cause less surface damage.

Depth classes per USGS

Volcanoes nearby

  • Spurr
    Distance: 40 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Redoubt
    Distance: 77 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Hayes
    Distance: 77 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Iliamna
    Distance: 129 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Augustine
    Distance: 204 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
  • Douglas
    Distance: 258 km ·Stratovolcano ·Elevation: 2'140 m ·United States

Historic earthquake map · United States

Open history map
Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · United States

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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