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M3.9 Depth: 35.0 km

M3.9 Earthquake near 81 km SSE of Adak, Alaska

UTC time: 2025-03-20 07:58:00 UTC Local time: —

About this earthquake

On March 20, 2025 at 07:58 UTC, a magnitude M3.9 earthquake occurred near 81 km SSE of Adak, Alaska. With a focal depth of about 35 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Shaking of this size is frequently noticed but usually harmless.

The data is provided by USGS and cross-checked across seismological networks.

Details

Magnitude
M3.9
Depth
35.0 km
UTC time
2025-03-20 07:58:00 UTC
Local time
—
Country
—
Source
usgs
Coordinates
51.18730, -176.20700

Map

Depth profile

Depth profile Depth: 35 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 35 km
Shallow
35 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

  • Moffett
    Distance: 92 km ·Stratovolcano ·Elevation: 1'196 m ·Last eruption: -1600 ·United States
  • Great Sitkin WATCH · ORANGE
    Distance: 99 km ·Stratovolcano ·Elevation: 1'740 m ·Last eruption: 2026 ·United States
  • Kanaga
    Distance: 105 km ·Stratovolcano ·Elevation: 1'307 m ·Last eruption: 2023 ·United States
  • Bobrof
    Distance: 117 km ·Stratovolcano ·Elevation: 738 m ·United States
  • Kasatochi
    Distance: 120 km ·Stratovolcano ·Elevation: 314 m ·Last eruption: 2008 ·United States
  • Koniuji
    Distance: 137 km ·Stratovolcano ·Elevation: 273 m ·Last eruption: -1150 ·United States

Stats (last 24h)

Global (24h)
654
Country (24h)
—
—
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