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Significant earthquake

This summarises a recorded earthquake only; it is not a warning or a prediction. Follow AFAD and the competent authorities for official statements and guidance.

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4.3

81 km SSE of Akutan, Alaska

25 October 2026, 10:45:47 (+03) 2026-10-25 07:45:47 UTC

2 sources: EMSC, USGS mb
Did you feel this earthquake?
Magnitude
4.3 mb
Depth
34.7 km
Coordinates
53.4908, -165.1943
Data consistency
88/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
7
Last 30 days
48

Approximate energy released

≈ 43 t TNT

1.78e+11 J

Approximated with the Gutenberg–Richter relation (log E = 1.5 M + 4.8); depends on magnitude type. Gutenberg & Richter (1956).

Did you feel this earthquake?

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Community reports

Based on voluntary reports from users; not an instrumental measurement or official intensity. For official information follow AFAD and Kandilli Observatory announcements.

Impact information reported by sources

  • USGS Earthquake Hazards Program Tsunami flag: No Maximum intensity (MMI): 2,7 ShakeMap

These values are automatic products of the respective agency, not an assessment by this platform. For tsunami warnings follow the Kandilli Observatory Regional Earthquake-Tsunami Monitoring Center and AFAD.

Nearby places

No records.

Nearby faults (50 km)

No mapped fault within 50 km.

Last year, within 100 km

48 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 31
  • M3 11
  • M4 5
  • M5 1
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 4
  • 10–20 km 14
  • 20–40 km 23
  • 40–70 km 6
  • 70–150 km 1
  • 150+ km 0

Largest previous earthquakes within 100 km

Largest earthquakes in the platform catalogue and entries from historical catalogues (with citation).

Comparison with past records

…

No earlier earthquakes are recorded in this area.

  • Source:

Where does this earthquake come from?

Source comparison

Agency Magnitude Depth Time (UTC) Difference from master Original record
EMSC-CSEM
FOX ISLANDS, ALEUTIAN ISLANDS
 4.2 ml 14.5 km 07:45:46.368 Δt 1.53 sn · 9.49 km · ΔM -0.1 Original record
USGS Earthquake Hazards Program Displayed
81 km SSE of Akutan, Alaska
 4.3 mb 34.7 km 07:45:47.895 Δt 0 sn · 0 km · ΔM 0 Original record

This value summarises agreement between sources; it is not a measure of scientific accuracy. Euro-Mediterranean Seismological Centre (EMSC-CSEM) — CC BY 4.0 U.S. Geological Survey (USGS) Earthquake Hazards Program — Public domain (U.S. Government)

Revision history

  1. 25.10.2026 11:23:56 · USGS · update

    depth: 14.5 → 34.7 latitude: 53.51 → 53.4908 longitude: -165.055 → -165.1943 magnitude: 4.2 → 4.3 time: 2026-10-25T07:45:46.368+00:00 → 2026-10-25T07:45:47.895+00:00 location: 84 km SE of Akutan, Alaska → 81 km SSE of Akutan, Alaska magnitude type: ml → mb

  2. 25.10.2026 11:23:56 · SISTEM · recompute

    depth: 14.5 → 34.7 latitude: 53.51 → 53.4908 longitude: -165.055 → -165.1943 magnitude: 4.2 → 4.3 time: 2026-10-25T07:45:46.368Z → 2026-10-25 07:45:47.895+00:00 magnitude type: ml → mb

  3. 25.10.2026 11:08:07 · USGS · update

    depth: 19.7 → 14.5 latitude: 53.44 → 53.51 longitude: -165.019 → -165.055 magnitude: 4.5 → 4.2 time: 2026-10-25T07:45:45.376+00:00 → 2026-10-25T07:45:46.368+00:00 location: 91 km SSE of Akutan, Alaska → 84 km SE of Akutan, Alaska

  4. 25.10.2026 11:08:07 · SISTEM · recompute

    depth: 19.7 → 14.5 latitude: 53.44 → 53.51 longitude: -165.019 → -165.055 magnitude: 4.5 → 4.2 time: 2026-10-25T07:45:45.376Z → 2026-10-25 07:45:46.368+00:00

  5. 25.10.2026 11:08:05 · SISTEM · recompute

    source count: 1 → 2 confirming sources: usgs → emsc,usgs

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