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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

116 km SE of Port Graham, Alaska

11 November 2026, 10:38:45 (+03) 2026-11-11 07:38:45 UTC

2 sources: EMSC, USGS ml
Did you feel this earthquake?
Magnitude
3.7 ml
Depth
40.2 km
Coordinates
58.5340, -150.5620
Data consistency
90/100

Regional activity (100 km)

Last 24 hours
1
Last 7 days
2
Last 30 days
3

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): 1,5 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

3 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 2
  • 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 1
  • 40–70 km 1
  • 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).

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
GULF OF ALASKA
 3.7 ml 40.2 km 07:38:45.753 Δt 0 sn · 0 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
116 km SE of Port Graham, Alaska
 3.7 ml 40.2 km 07:38:45.752 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 23:04:41 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  2. 11.11.2026 23:02:36 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  3. 11.11.2026 23:01:36 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  4. 11.11.2026 22:58:32 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  5. 11.11.2026 22:56:25 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  6. 11.11.2026 22:55:22 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  7. 11.11.2026 22:51:14 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  8. 11.11.2026 22:50:11 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  9. 11.11.2026 22:48:07 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  10. 11.11.2026 22:44:02 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  11. 11.11.2026 22:42:56 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  12. 11.11.2026 22:41:56 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  13. 11.11.2026 22:37:41 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  14. 11.11.2026 22:36:47 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  15. 11.11.2026 22:34:36 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  16. 11.11.2026 22:33:31 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  17. 11.11.2026 22:32:31 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  18. 11.11.2026 22:29:21 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  19. 11.11.2026 22:28:21 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  20. 11.11.2026 22:26:17 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  21. 11.11.2026 22:23:16 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

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

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  23. 11.11.2026 22:13:46 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  24. 11.11.2026 22:12:46 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  25. 11.11.2026 22:10:44 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  26. 11.11.2026 22:08:37 · EMSC · update

    time: 2026-11-11T07:38:45.753+00:00 → 2026-11-11T07:38:45.752+00:00

  27. 11.11.2026 22:04:32 · USGS · update

    depth: 42 → 40.2 latitude: 58.528 → 58.534 longitude: -150.546 → -150.562 time: 2026-11-11T07:38:45.773+00:00 → 2026-11-11T07:38:45.752+00:00 location: 117 km SE of Port Graham, Alaska → 116 km SE of Port Graham, Alaska review status: automatic → reviewed

  28. 11.11.2026 22:04:32 · SISTEM · recompute

    time: 2026-11-11T07:38:45.753Z → 2026-11-11 07:38:45.752+00:00 review status: automatic → reviewed preferred source: 3 → 4

  29. 11.11.2026 22:04:31 · EMSC · update

    depth: 35 → 40.2 latitude: 58.477 → 58.534 longitude: -150.4948 → -150.562 time: 2026-11-11T07:38:44.828+00:00 → 2026-11-11T07:38:45.752+00:00

  30. 11.11.2026 22:04:31 · SISTEM · recompute

    depth: 35 → 40.2 latitude: 58.477 → 58.534 longitude: -150.4948 → -150.562 time: 2026-11-11T07:38:44.828Z → 2026-11-11 07:38:45.753+00:00

  31. 11.11.2026 11:12:41 · EMSC · update

    depth: 42 → 35 latitude: 58.528 → 58.477 longitude: -150.546 → -150.4948 time: 2026-11-11T07:38:45.774+00:00 → 2026-11-11T07:38:44.828+00:00

  32. 11.11.2026 11:12:41 · SISTEM · recompute

    depth: 42 → 35 latitude: 58.528 → 58.477 longitude: -150.546 → -150.4948 time: 2026-11-11T07:38:45.774Z → 2026-11-11 07:38:44.828+00:00

  33. 11.11.2026 11:10:38 · EMSC · update

    time: 2026-11-11T07:38:45.774+00:00 → 2026-11-11T07:38:45.773+00:00

  34. 11.11.2026 11:08:35 · EMSC · update

    time: 2026-11-11T07:38:45.774+00:00 → 2026-11-11T07:38:45.773+00:00

  35. 11.11.2026 11:06:32 · EMSC · update

    time: 2026-11-11T07:38:45.774+00:00 → 2026-11-11T07:38:45.773+00:00

  36. 11.11.2026 11:02:25 · EMSC · update

    time: 2026-11-11T07:38:45.774+00:00 → 2026-11-11T07:38:45.773+00:00

  37. 11.11.2026 11:01:26 · EMSC · update

    time: 2026-11-11T07:38:45.774+00:00 → 2026-11-11T07:38:45.773+00:00

  38. 11.11.2026 10:58:15 · EMSC · update

    time: 2026-11-11T07:38:45.774+00:00 → 2026-11-11T07:38:45.773+00:00

  39. 11.11.2026 10:51:02 · EMSC · update

    time: 2026-11-11T07:38:45.774+00:00 → 2026-11-11T07:38:45.773+00:00

  40. 11.11.2026 10:43:49 · USGS · update

    depth: 32.7 → 42 latitude: 58.537 → 58.528 longitude: -150.537 → -150.546 time: 2026-11-11T07:38:46.042+00:00 → 2026-11-11T07:38:45.773+00:00

  41. 11.11.2026 10:43:47 · EMSC · update

    depth: 32.7 → 42 latitude: 58.537 → 58.528 longitude: -150.537 → -150.546 time: 2026-11-11T07:38:46.042+00:00 → 2026-11-11T07:38:45.773+00:00

  42. 11.11.2026 10:43:47 · SISTEM · recompute

    depth: 32.7 → 42 latitude: 58.537 → 58.528 longitude: -150.537 → -150.546 time: 2026-11-11T07:38:46.042Z → 2026-11-11 07:38:45.774+00:00

  43. 11.11.2026 10:41:42 · USGS · update

    depth: 49.9 → 32.7 latitude: 58.556 → 58.537 longitude: -150.556 → -150.537 time: 2026-11-11T07:38:46.787+00:00 → 2026-11-11T07:38:46.042+00:00 location: 114 km SE of Port Graham, Alaska → 117 km SE of Port Graham, Alaska

  44. 11.11.2026 10:41:41 · EMSC · update

    depth: 49.9 → 32.7 latitude: 58.556 → 58.537 longitude: -150.556 → -150.537 time: 2026-11-11T07:38:46.788+00:00 → 2026-11-11T07:38:46.042+00:00

  45. 11.11.2026 10:41:41 · SISTEM · recompute

    depth: 49.9 → 32.7 latitude: 58.556 → 58.537 longitude: -150.556 → -150.537 time: 2026-11-11T07:38:46.788Z → 2026-11-11 07:38:46.042+00:00

  46. 11.11.2026 10:40:37 · SISTEM · recompute

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

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