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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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3.6

81 km SE of Unalaska, Alaska

19 October 2026, 22:54:50 (+03) 2026-10-19 19:54:50 UTC

2 sources: EMSC, USGS mb
Did you feel this earthquake?
Magnitude
3.6 mb
Depth
35.0 km
Coordinates
53.3590, -165.6508
Data consistency
90/100

Regional activity (100 km)

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

Approximate energy released

≈ 3.8 t TNT

1.58e+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): 1,6 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 3
  • 10–20 km 14
  • 20–40 km 24
  • 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
 3.6 ml 18.0 km 19:54:48.590 Δt 1.51 sn · 6.16 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
81 km SE of Unalaska, Alaska
 3.6 mb 35.0 km 19:54:50.104 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. 22.10.2026 21:11:55 · USGS · update

    depth: 18 → 35 latitude: 53.307 → 53.359 longitude: -165.619 → -165.6508 time: 2026-10-19T19:54:48.589+00:00 → 2026-10-19T19:54:50.104+00:00 location: 87 km SE of Unalaska, Alaska → 81 km SE of Unalaska, Alaska magnitude type: ml → mb

  2. 22.10.2026 21:11:55 · SISTEM · recompute

    depth: 18 → 35 latitude: 53.307 → 53.359 longitude: -165.619 → -165.6508 time: 2026-10-19T19:54:48.589Z → 2026-10-19 19:54:50.104+00:00 magnitude type: ml → mb

  3. 20.10.2026 03:38:17 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  4. 20.10.2026 03:37:12 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  5. 20.10.2026 03:36:10 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  6. 20.10.2026 03:35:05 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  7. 20.10.2026 03:33:59 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  8. 20.10.2026 03:32:55 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  9. 20.10.2026 03:29:54 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  10. 20.10.2026 03:23:33 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  11. 20.10.2026 03:22:31 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  12. 20.10.2026 03:19:18 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  13. 20.10.2026 03:18:18 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  14. 20.10.2026 03:17:13 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  15. 20.10.2026 03:15:04 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  16. 20.10.2026 03:13:58 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  17. 20.10.2026 03:11:52 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  18. 20.10.2026 03:09:48 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  19. 20.10.2026 03:08:48 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  20. 20.10.2026 03:05:40 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  21. 20.10.2026 03:04:37 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  22. 20.10.2026 03:02:33 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  23. 20.10.2026 03:01:30 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  24. 20.10.2026 03:00:28 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  25. 20.10.2026 02:59:11 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  26. 20.10.2026 02:53:55 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  27. 20.10.2026 02:51:48 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  28. 20.10.2026 02:50:47 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  29. 20.10.2026 02:47:37 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  30. 20.10.2026 02:45:35 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  31. 20.10.2026 02:44:33 · EMSC · update

    time: 2026-10-19T19:54:48.590+00:00 → 2026-10-19T19:54:48.589+00:00

  32. 20.10.2026 02:43:40 · SISTEM · recompute

    time: 2026-10-19T19:54:48.590Z → 2026-10-19 19:54:48.589+00:00 source count: 1 → 2 review status: automatic → reviewed confirming sources: emsc → emsc,usgs preferred source: 3 → 4

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