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M1.7 Depth: 77.7 km

M1.7 Earthquake near 23 km WNW of Petersville, Alaska (United States)

UTC time: 2025-09-20 16:51:37 UTC Local time: —

About this earthquake

A magnitude M1.7 earthquake was recorded near 23 km WNW of Petersville, Alaska (United States) on September 20, 2025 at 16:51 UTC. The earthquake originated at an intermediate depth of about 78 km. 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 168 earthquakes, the strongest at M3.5.

Details

Magnitude
M1.7
Depth
77.7 km
UTC time
2025-09-20 16:51:37 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
62.56880, -151.19840
Temperature
9.2°C

Map

Depth profile

Depth profile Depth: 77.7 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 77.7 km
Intermediate
77.7 km
77.7 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

  • Hayes
    Distance: 121 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Spurr
    Distance: 152 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Buzzard Creek
    Distance: 216 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·United States
  • Redoubt
    Distance: 246 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Iliamna
    Distance: 300 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Augustine
    Distance: 376 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States

Historic earthquake map · United States

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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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