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M1.7 Depth: 44.5 km

M1.7 Earthquake near 7 km SSE of Big Lake, Alaska (United States)

UTC time: 2025-09-20 02:01:08 UTC Local time: —

About this earthquake

A magnitude M1.7 earthquake was recorded near 7 km SSE of Big Lake, Alaska (United States) on September 20, 2025 at 02:01 UTC. With a focal depth of about 45 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size typically go unnoticed.

The event was recorded by USGS. United States: over the past 24 hours, QuakeMap24 logged 171 earthquakes, the strongest at M3.5.

Details

Magnitude
M1.7
Depth
44.5 km
UTC time
2025-09-20 02:01:08 UTC
Local time
—
Country
United States
City
Alaska
Source
usgs
Coordinates
61.46520, -149.88780
Temperature
10.6°C

Map

Depth profile

Depth profile Depth: 44.5 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 44.5 km
Shallow
44.5 km
44.5 km — deeper than the regional average (15.4 km)
Regional average: 15.4 km
Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Volcanoes nearby

  • Spurr
    Distance: 127 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Hayes
    Distance: 135 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Redoubt
    Distance: 189 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Iliamna
    Distance: 236 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Buzzard Creek
    Distance: 298 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·United States
  • Augustine
    Distance: 304 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·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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