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M4.1 Depth: 35.0 km

M4.1 Earthquake near 99 km SSE of Adak, Alaska

UTC time: 2025-03-21 16:03:51 UTC Local time: —

About this earthquake

On March 21, 2025 at 16:03 UTC, a magnitude M4.1 earthquake occurred near 99 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. Tremors of this size are distinctly felt and can occasionally cause light damage.

The event was recorded by USGS.

Details

Magnitude
M4.1
Depth
35.0 km
UTC time
2025-03-21 16:03:51 UTC
Local time
—
Country
—
Source
usgs
Coordinates
51.05630, -176.06330

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

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    Distance: 109 km ·Stratovolcano ·Elevation: 1'196 m ·Last eruption: -1600 ·United States
  • Great Sitkin WATCH · ORANGE
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  • Kanaga
    Distance: 123 km ·Stratovolcano ·Elevation: 1'307 m ·Last eruption: 2023 ·United States
  • Kasatochi
    Distance: 130 km ·Stratovolcano ·Elevation: 314 m ·Last eruption: 2008 ·United States
  • Bobrof
    Distance: 134 km ·Stratovolcano ·Elevation: 738 m ·United States
  • Koniuji
    Distance: 145 km ·Stratovolcano ·Elevation: 273 m ·Last eruption: -1150 ·United States

Stats (last 24h)

Global (24h)
649
Country (24h)
—
—
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