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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

78 km S of Nikolski, Alaska

4 November 2026, 15:22:50 (+03) 2026-11-04 12:22:50 UTC

2 sources: EMSC, USGS mb
Did you feel this earthquake?
Magnitude
4.3 mb
Depth
11.6 km
Coordinates
52.2397, -168.7640
Data consistency
90/100

Regional activity (100 km)

Last 24 hours
1
Last 7 days
11
Last 30 days
32

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?

Your report adds to a community map of where and how this earthquake was felt. It takes less than a minute.

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): 2,3 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

39 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 16
  • M3 17
  • M4 6
  • M5 0
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 11
  • 10–20 km 18
  • 20–40 km 5
  • 40–70 km 3
  • 70–150 km 2
  • 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 12.6 km 12:22:50.919 Δt 0.84 sn · 4.11 km · ΔM -0.1 Original record
USGS Earthquake Hazards Program Displayed
78 km S of Nikolski, Alaska
 4.3 mb 11.6 km 12:22:50.079 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. 06.11.2026 02:07:10 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  2. 06.11.2026 02:04:02 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  3. 06.11.2026 02:03:02 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  4. 06.11.2026 02:01:56 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  5. 06.11.2026 01:54:47 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  6. 06.11.2026 01:53:46 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  7. 06.11.2026 01:51:41 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  8. 06.11.2026 01:49:42 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  9. 06.11.2026 01:48:35 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  10. 06.11.2026 01:47:32 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  11. 06.11.2026 01:44:21 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  12. 06.11.2026 01:43:18 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  13. 06.11.2026 01:42:18 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  14. 06.11.2026 01:41:13 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  15. 06.11.2026 01:38:04 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  16. 06.11.2026 01:36:57 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  17. 06.11.2026 01:35:57 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  18. 06.11.2026 01:30:43 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  19. 06.11.2026 01:29:42 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  20. 06.11.2026 01:27:37 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  21. 06.11.2026 01:25:32 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  22. 06.11.2026 01:23:32 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  23. 06.11.2026 01:22:31 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  24. 06.11.2026 01:16:10 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  25. 06.11.2026 01:14:06 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  26. 06.11.2026 01:13:00 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  27. 06.11.2026 01:12:01 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  28. 06.11.2026 01:11:04 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  29. 06.11.2026 01:09:58 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  30. 06.11.2026 01:08:57 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  31. 06.11.2026 01:07:53 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  32. 06.11.2026 01:06:46 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  33. 05.11.2026 14:10:13 · USGS · update

    depth: 12.6 → 11.59 latitude: 52.208 → 52.2397 longitude: -168.733 → -168.764 magnitude: 4.2 → 4.3 time: 2026-11-04T12:22:50.918+00:00 → 2026-11-04T12:22:50.079+00:00 location: 81 km S of Nikolski, Alaska → 78 km S of Nikolski, Alaska magnitude type: ml → mb

  34. 05.11.2026 14:10:13 · SISTEM · recompute

    depth: 12.6 → 11.59 latitude: 52.208 → 52.2397 longitude: -168.733 → -168.764 magnitude: 4.2 → 4.3 time: 2026-11-04T12:22:50.918Z → 2026-11-04 12:22:50.079+00:00 magnitude type: ml → mb

  35. 04.11.2026 21:19:35 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  36. 04.11.2026 21:16:31 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  37. 04.11.2026 21:11:13 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  38. 04.11.2026 21:09:28 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  39. 04.11.2026 21:07:24 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  40. 04.11.2026 21:05:25 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  41. 04.11.2026 21:03:24 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  42. 04.11.2026 21:01:16 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  43. 04.11.2026 20:54:23 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  44. 04.11.2026 20:52:10 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  45. 04.11.2026 20:47:39 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  46. 04.11.2026 20:43:28 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  47. 04.11.2026 20:41:13 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  48. 04.11.2026 20:37:24 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  49. 04.11.2026 20:30:59 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  50. 04.11.2026 20:29:33 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  51. 04.11.2026 20:27:31 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  52. 04.11.2026 20:23:23 · EMSC · update

    time: 2026-11-04T12:22:50.919+00:00 → 2026-11-04T12:22:50.918+00:00

  53. 04.11.2026 20:21:11 · SISTEM · recompute

    time: 2026-11-04T12:22:50.919Z → 2026-11-04 12:22:50.918+00:00 source count: 1 → 2 review status: automatic → reviewed confirming sources: emsc → emsc,usgs preferred source: 3 → 4

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