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M5.0 Earthquake near 262 km SE of Chiniak, Alaska

UTC time: 2025-12-16 23:35:26 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
20.0 km
Source
USGS

262 km SE of Chiniak, Alaska

Map

M5.0 Earthquake near 262 km SE of Chiniak, Alaska · 2025-12-16 — Map showing the location of the epicenter
M5.0 Earthquake near 262 km SE of Chiniak, Alaska · 2025-12-16 — Map showing the location of the epicenter

About this earthquake

On December 16, 2025 at 23:35 UTC, a magnitude M5.0 earthquake occurred near 262 km SE of Chiniak, Alaska. With a focal depth of about 20 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this magnitude can damage poorly built structures.

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

Details

ID
410ce63b764185518dde1a4076042d75aa38f686
Magnitude
M5.0
Depth
20.0 km
UTC time
2025-12-16 23:35:26 UTC
Local time
—
Country
—
Source
usgs
Coordinates
56.32500, -148.66800
Temperature
1.8°C

Depth profile

Depth profile Depth: 20 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 20 km
Shallow
20 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 8, 2026, 11:35 PM UTC · Last checked: Sep 12, 2026, 12:37 AM UTC

Sep 9, 2026, 12:00 AM UTC – Sep 10, 2026, 12:00 AM UTC · Expired
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.00.20 %0–0
M ≥ 4.00.02 %0–0
M ≥ 5.0< 0.01 %0–0
M ≥ 6.0< 0.01 %0–0
M ≥ 7.0< 0.01 %0–0
Sep 9, 2026, 12:00 AM UTC – Sep 16, 2026, 12:00 AM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.01.40 %0–0
M ≥ 4.00.14 %0–0
M ≥ 5.00.01 %0–0
M ≥ 6.0< 0.01 %0–0
M ≥ 7.0< 0.01 %0–0
Sep 9, 2026, 12:00 AM UTC – Oct 9, 2026, 12:00 AM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.05.56 %0–1
M ≥ 4.00.58 %0–0
M ≥ 5.00.06 %0–0
M ≥ 6.0< 0.01 %0–0
M ≥ 7.0< 0.01 %0–0
Sep 9, 2026, 12:00 AM UTC – Sep 9, 2027, 12:00 AM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.034.39 %0–3
M ≥ 4.04.67 %0–1
M ≥ 5.00.48 %0–0
M ≥ 6.00.05 %0–0
M ≥ 7.0< 0.01 %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

Nearby population centers

Distances are straight-line distances from the epicenter. Population data: GeoNames.

PlaceDistanceDirectionPopulation
Anchorage548.7 kmN289'600

GeoNames · CC BY 4.0

Volcanoes nearby

  • Fourpeaked
    Distance: 404 km ·Stratovolcano ·Elevation: 2'105 m ·Last eruption: 2006 ·United States
  • Douglas
    Distance: 404 km ·Stratovolcano ·Elevation: 2'140 m ·United States
  • Kaguyak
    Distance: 409 km ·Lava dome(s) ·Elevation: 901 m ·Last eruption: -3850 ·United States
  • Kukak
    Distance: 415 km ·Stratovolcano ·Elevation: 2'043 m ·United States
  • Steller
    Distance: 415 km ·Stratovolcano ·Elevation: 2'279 m ·United States
  • Denison
    Distance: 417 km ·Stratovolcano ·Elevation: 2'287 m ·United States

Subsequent earthquakes nearby

Events recorded after this earthquake within 150 km. They are not automatically classified as aftershocks.

First 6 hours1
First 24 hours1
First 72 hours1
Strongest subsequent eventM5.0
M5.02025-12-16 23:35:27 UTC3.4 kmEvent of magnitude 5.0, near of Anchorage (Monde) M3.82026-01-01 00:46:27 UTC3.2 km259 km SE of Chiniak, Alaska M3.92026-01-01 00:46:31 UTC12.5 kmGULF OF ALASKA M3.12026-01-06 18:18:05 UTC40.5 km230 km SE of Chiniak, Alaska M3.52026-01-06 18:18:08 UTC40.7 kmGULF OF ALASKA M3.32026-01-07 21:19:24 UTC37.7 km252 km SE of Chiniak, Alaska M3.92026-01-07 21:19:26 UTC60.6 km276 km SE of Chiniak, Alaska M3.72026-01-11 18:19:40 UTC34.3 kmGULF OF ALASKA M2.62026-01-11 18:19:43 UTC57.8 km217 km ESE of Chiniak, Alaska

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)
637
Country (24h)
—
—
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