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M1.7 Depth: 89.4 km

M1.7 Earthquake near 16 km S of Tyonek, Alaska (United States)

UTC time: 2025-09-21 08:40:23 UTC Local time: —

About this earthquake

A magnitude M1.7 earthquake was recorded near 16 km S of Tyonek, Alaska (United States) on September 21, 2025 at 08:40 UTC. At around 89 km, the focal depth places this among intermediate-depth events. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 166 earthquakes, the strongest at M3.7.

Details

Magnitude
M1.7
Depth
89.4 km
UTC time
2025-09-21 08:40:23 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
60.92520, -151.09500
Temperature
11.9°C

Map

Depth profile

Depth profile Depth: 89.4 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 89.4 km
Intermediate
89.4 km
89.4 km — deeper than the regional average (15.4 km)
Regional average: 15.4 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: 75 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Redoubt
    Distance: 102 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Hayes
    Distance: 106 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Iliamna
    Distance: 148 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Augustine
    Distance: 217 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States
  • Douglas
    Distance: 268 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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