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M5.0 Earthquake near 85 km SE of Atka, Alaska

UTC time: 2025-12-01 22:21:05 UTC Local time: —
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Archive record · original publication time was not recorded Content updated:

Automatically generated from measurement data by QuakeMap24. Values may change after further analysis.

Magnitude
M5.0
Depth
3.0 km
Source
USGS

85 km SE of Atka, Alaska

Map

About this earthquake

On December 1, 2025 at 22:21 UTC, a magnitude M5.0 earthquake occurred near 85 km SE of Atka, Alaska. The hypocenter lay relatively close to the surface at around 3 km, increasing how strongly it was felt. Tremors of this size are distinctly felt and can occasionally cause light damage.

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

Details

ID
7f6fede738e9d9bdb7990ffced94735af9b258a6
Magnitude
M5.0
Depth
3.0 km
UTC time
2025-12-01 22:21:05 UTC
Local time
—
Country
—
Source
usgs
Coordinates
51.60487, -173.41368
Temperature
6.2°C

Depth profile

Depth profile Depth: 3 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 3 km
Shallow
3 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

Official USGS aftershock forecast

Probability of at least one aftershock at or above the specified magnitude during the entire stated time window. This does not predict an individual earthquake.

Issued: Sep 7, 2026, 10:21 PM UTC · Last checked: Sep 12, 2026, 11:22 AM UTC

Sep 7, 2026, 11:00 PM UTC – Sep 8, 2026, 11:00 PM UTC · Expired
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.01.46 %0–0
M ≥ 4.00.15 %0–0
M ≥ 5.00.01 %0–0
M ≥ 6.0< 0.01 %0–0
M ≥ 7.0< 0.01 %0–0
Sep 7, 2026, 11:00 PM UTC – Sep 14, 2026, 11:00 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.09.68 %0–1
M ≥ 4.01.02 %0–0
M ≥ 5.00.10 %0–0
M ≥ 6.00.01 %0–0
M ≥ 7.0< 0.01 %0–0
Sep 7, 2026, 11:00 PM UTC – Oct 7, 2026, 11:00 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.033.84 %0–2
M ≥ 4.04.14 %0–1
M ≥ 5.00.42 %0–0
M ≥ 6.00.04 %0–0
M ≥ 7.0< 0.01 %0–0
Sep 7, 2026, 11:00 PM UTC – Sep 7, 2027, 11:00 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.094.97 %0–9
M ≥ 4.029.91 %0–2
M ≥ 5.03.56 %0–1
M ≥ 6.00.36 %0–0
M ≥ 7.00.04 %0–0

The range is the 95% forecast interval for the number of earthquakes. Magnitude thresholds and time windows overlap: do not add the values. Windows already in progress still refer to the entire stated period.

Source: USGS — Operational Aftershock Forecast

Volcanoes nearby

  • Atka Volcanic Complex
    Distance: 95 km ·Stratovolcano(es) ·Elevation: 1'518 m ·Last eruption: 2025 ·United States
  • Seguam
    Distance: 100 km ·Stratovolcano(es) ·Elevation: 1'054 m ·Last eruption: 1993 ·United States
  • Koniuji
    Distance: 136 km ·Stratovolcano ·Elevation: 273 m ·Last eruption: -1150 ·United States
  • Kasatochi
    Distance: 157 km ·Stratovolcano ·Elevation: 314 m ·Last eruption: 2008 ·United States
  • Amukta
    Distance: 178 km ·Stratovolcano ·Elevation: 1'066 m ·Last eruption: 1996 ·United States
  • Chagulak
    Distance: 189 km ·Stratovolcano ·Elevation: 1'028 m ·United States

No unambiguous area assignment

Context for this earthquake

This event has no unambiguous country assignment in the analysed catalogue. It is therefore not assigned to a regional profile.

Earthquake overview

Stats (last 24h)

Global (24h)
694
Country (24h)
—
—
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