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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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3.7

53 km SW of Port Alexander, Alaska

11 November 2026, 11:48:43 (+03) 2026-11-11 08:48:43 UTC

2 sources: EMSC, USGS ml
Did you feel this earthquake?
Magnitude
3.7 ml
Depth
3.4 km
Coordinates
55.8950, -135.2250
Data consistency
90/100

Regional activity (100 km)

Last 24 hours
1
Last 7 days
1
Last 30 days
1

Approximate energy released

≈ 5.4 t TNT

2.24e+10 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): 1,7 Felt reports: 1 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

1 earthquakes

By magnitude

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

By depth

  • 0–10 km 1
  • 10–20 km 0
  • 20–40 km 0
  • 40–70 km 0
  • 70–150 km 0
  • 150+ km 0

Largest previous earthquakes within 100 km

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

No records.

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
OFF COAST OF SOUTHEASTERN ALASKA
 3.7 ml 3.4 km 08:48:43.022 Δt 0 sn · 0 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
53 km SW of Port Alexander, Alaska
 3.7 ml 3.4 km 08:48:43.021 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. 11.11.2026 23:10:57 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  2. 11.11.2026 23:09:58 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  3. 11.11.2026 23:08:56 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  4. 11.11.2026 23:05:43 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  5. 11.11.2026 23:04:41 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  6. 11.11.2026 23:02:36 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  7. 11.11.2026 23:01:36 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  8. 11.11.2026 22:58:32 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  9. 11.11.2026 22:56:25 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  10. 11.11.2026 22:55:22 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  11. 11.11.2026 22:51:14 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  12. 11.11.2026 22:50:11 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  13. 11.11.2026 22:48:07 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  14. 11.11.2026 22:44:02 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  15. 11.11.2026 22:42:56 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  16. 11.11.2026 22:41:56 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  17. 11.11.2026 22:37:41 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  18. 11.11.2026 22:36:47 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  19. 11.11.2026 22:34:36 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  20. 11.11.2026 22:33:31 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  21. 11.11.2026 22:32:31 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  22. 11.11.2026 22:29:21 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  23. 11.11.2026 22:28:21 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  24. 11.11.2026 22:26:17 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  25. 11.11.2026 22:23:16 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  26. 11.11.2026 22:15:53 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  27. 11.11.2026 22:13:46 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  28. 11.11.2026 22:12:46 · EMSC · update

    time: 2026-11-11T08:48:43.022+00:00 → 2026-11-11T08:48:43.021+00:00

  29. 11.11.2026 22:10:46 · USGS · update

    depth: 4.1 → 3.4 latitude: 55.891 → 55.895 longitude: -135.247 → -135.225 time: 2026-11-11T08:48:42.846+00:00 → 2026-11-11T08:48:43.021+00:00 location: 54 km SW of Port Alexander, Alaska → 53 km SW of Port Alexander, Alaska review status: automatic → reviewed

  30. 11.11.2026 22:10:46 · SISTEM · recompute

    time: 2026-11-11T08:48:43.022Z → 2026-11-11 08:48:43.021+00:00 review status: automatic → reviewed preferred source: 3 → 4

  31. 11.11.2026 22:10:44 · EMSC · update

    depth: 4.1 → 3.4 latitude: 55.891 → 55.895 longitude: -135.247 → -135.225 time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:43.021+00:00

  32. 11.11.2026 22:10:44 · SISTEM · recompute

    depth: 4.1 → 3.4 latitude: 55.891 → 55.895 longitude: -135.247 → -135.225 time: 2026-11-11T08:48:42.847Z → 2026-11-11 08:48:43.022+00:00

  33. 11.11.2026 12:45:13 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  34. 11.11.2026 12:44:12 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  35. 11.11.2026 12:43:11 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  36. 11.11.2026 12:41:07 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  37. 11.11.2026 12:40:01 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  38. 11.11.2026 12:38:00 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  39. 11.11.2026 12:36:57 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  40. 11.11.2026 12:34:54 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  41. 11.11.2026 12:33:51 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  42. 11.11.2026 12:32:48 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  43. 11.11.2026 12:31:46 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  44. 11.11.2026 12:30:44 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  45. 11.11.2026 12:29:43 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  46. 11.11.2026 12:28:40 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  47. 11.11.2026 12:27:42 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  48. 11.11.2026 12:26:37 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  49. 11.11.2026 12:25:36 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  50. 11.11.2026 12:24:35 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  51. 11.11.2026 12:23:33 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  52. 11.11.2026 12:22:26 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  53. 11.11.2026 12:21:27 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  54. 11.11.2026 12:15:16 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  55. 11.11.2026 12:14:11 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  56. 11.11.2026 12:08:02 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  57. 11.11.2026 12:06:56 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  58. 11.11.2026 12:04:49 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  59. 11.11.2026 12:02:45 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  60. 11.11.2026 12:01:41 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  61. 11.11.2026 12:00:41 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  62. 11.11.2026 11:59:40 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  63. 11.11.2026 11:58:40 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  64. 11.11.2026 11:52:11 · EMSC · update

    time: 2026-11-11T08:48:42.847+00:00 → 2026-11-11T08:48:42.846+00:00

  65. 11.11.2026 11:51:09 · SISTEM · recompute

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

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