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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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4.2

150 km SW of Adak, Alaska

1 November 2026, 13:56:45 (+03) 2026-11-01 10:56:45 UTC

2 sources: EMSC, USGS ml
Did you feel this earthquake?
Magnitude
4.2 ml
Depth
23.1 km
Coordinates
51.1190, -178.4330
Data consistency
90/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
3
Last 30 days
28

Approximate energy released

≈ 30 t TNT

1.26e+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): 3,4 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

34 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 25
  • M3 7
  • M4 2
  • M5 0
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 6
  • 10–20 km 15
  • 20–40 km 10
  • 40–70 km 2
  • 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
ANDREANOF ISLANDS, ALEUTIAN IS.
 4.2 ml 23.1 km 10:56:45.848 Δt 0 sn · 0 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
150 km SW of Adak, Alaska
 4.2 ml 23.1 km 10:56:45.847 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. 04.11.2026 08:29:20 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  2. 04.11.2026 08:28:15 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  3. 04.11.2026 08:23:55 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  4. 04.11.2026 08:21:46 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  5. 04.11.2026 08:16:01 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  6. 04.11.2026 08:14:57 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  7. 04.11.2026 08:08:32 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  8. 04.11.2026 08:05:24 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  9. 04.11.2026 08:04:24 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  10. 04.11.2026 08:02:17 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  11. 04.11.2026 08:01:07 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  12. 04.11.2026 07:58:57 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  13. 04.11.2026 07:55:47 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  14. 04.11.2026 07:47:18 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  15. 04.11.2026 07:46:09 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  16. 04.11.2026 07:45:07 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  17. 04.11.2026 07:44:07 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  18. 04.11.2026 07:43:06 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  19. 04.11.2026 07:42:00 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  20. 04.11.2026 07:38:52 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  21. 04.11.2026 07:37:49 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  22. 04.11.2026 07:36:49 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  23. 04.11.2026 07:34:47 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  24. 04.11.2026 07:32:39 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  25. 04.11.2026 07:30:35 · EMSC · update

    time: 2026-11-01T10:56:45.848+00:00 → 2026-11-01T10:56:45.847+00:00

  26. 04.11.2026 07:29:36 · USGS · update

    depth: 31.86 → 23.1 latitude: 51.1595 → 51.119 longitude: -178.4305 → -178.433 time: 2026-11-01T10:56:19.846+00:00 → 2026-11-01T10:56:45.847+00:00 location: 147 km WSW of Adak, Alaska → 150 km SW of Adak, Alaska magnitude type: mb → ml

  27. 04.11.2026 07:29:36 · SISTEM · recompute

    depth: 31.86 → 23.1 latitude: 51.1595 → 51.119 longitude: -178.4305 → -178.433 time: 2026-11-01T10:56:19.846Z → 2026-11-01 10:56:45.847+00:00 magnitude type: mb → ml

  28. 04.11.2026 07:29:35 · EMSC · update

    depth: 31.9 → 23.1 latitude: 51.1595 → 51.119 longitude: -178.4305 → -178.433 time: 2026-11-01T10:56:19.846+00:00 → 2026-11-01T10:56:45.847+00:00 magnitude type: mb → ml

  29. 01.11.2026 14:33:09 · SISTEM · recompute

    depth: 31.9 → 31.86 source count: 1 → 2 review status: automatic → reviewed confirming sources: emsc → emsc,usgs preferred source: 3 → 4

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