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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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3.3

237 km SE of Attu Station, Alaska

21 October 2026, 16:57:46 (+03) 2026-10-21 13:57:46 UTC

2 sources: EMSC, USGS ml
Did you feel this earthquake?
Magnitude
3.3 ml
Depth
5.0 km
Coordinates
51.2680, 175.5150
Data consistency
90/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
0
Last 30 days
1

Approximate energy released

≈ 1.3 t TNT

5.62e+9 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?

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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

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 0
  • M3 1
  • M4 2
  • M5 0
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 1
  • 10–20 km 1
  • 20–40 km 1
  • 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).

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
RAT ISLANDS, ALEUTIAN ISLANDS
 3.3 ml 5.0 km 13:57:46.058 Δt 0 sn · 0 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
237 km SE of Attu Station, Alaska
 3.3 ml 5.0 km 13:57:46.057 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. 24.10.2026 03:06:49 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  2. 24.10.2026 03:04:44 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  3. 24.10.2026 03:03:40 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  4. 24.10.2026 03:01:39 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  5. 24.10.2026 02:59:35 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  6. 24.10.2026 02:58:32 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  7. 24.10.2026 02:57:29 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  8. 24.10.2026 02:56:28 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  9. 24.10.2026 02:53:18 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  10. 24.10.2026 02:50:06 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  11. 24.10.2026 02:48:05 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  12. 24.10.2026 02:46:59 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  13. 24.10.2026 02:45:59 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  14. 24.10.2026 02:44:59 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  15. 24.10.2026 02:40:50 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  16. 24.10.2026 02:35:38 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  17. 24.10.2026 02:33:37 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  18. 24.10.2026 02:32:35 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  19. 24.10.2026 02:31:30 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  20. 24.10.2026 02:30:28 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  21. 24.10.2026 02:29:27 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  22. 24.10.2026 02:28:25 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  23. 24.10.2026 02:23:12 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  24. 24.10.2026 02:22:10 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  25. 24.10.2026 02:20:06 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  26. 24.10.2026 02:19:03 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  27. 24.10.2026 02:17:57 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  28. 24.10.2026 02:15:51 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  29. 24.10.2026 02:13:43 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  30. 24.10.2026 02:09:33 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  31. 24.10.2026 02:08:29 · EMSC · update

    time: 2026-10-21T13:57:46.058+00:00 → 2026-10-21T13:57:46.057+00:00

  32. 24.10.2026 02:07:24 · SISTEM · recompute

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

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