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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

151 km S of False Pass, Alaska

21 October 2026, 15:18:57 (+03) 2026-10-21 12:18:57 UTC

2 sources: EMSC, USGS ml
Did you feel this earthquake?
Magnitude
3.3 ml
Depth
21.2 km
Coordinates
53.4990, -163.5720
Data consistency
90/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
30
Last 30 days
67

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

68 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 38
  • M3 22
  • M4 5
  • M5 3
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 16
  • 10–20 km 31
  • 20–40 km 19
  • 40–70 km 2
  • 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
UNIMAK ISLAND REGION, ALASKA
 3.3 ml 21.2 km 12:18:57.314 Δt 0 sn · 0 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
151 km S of False Pass, Alaska
 3.3 ml 21.2 km 12:18:57.313 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. 21.10.2026 21:02:05 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  2. 21.10.2026 21:01:06 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  3. 21.10.2026 20:58:55 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  4. 21.10.2026 20:57:52 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  5. 21.10.2026 20:56:49 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  6. 21.10.2026 20:55:47 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  7. 21.10.2026 20:45:08 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  8. 21.10.2026 20:44:00 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  9. 21.10.2026 20:42:56 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  10. 21.10.2026 20:40:51 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  11. 21.10.2026 20:37:47 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  12. 21.10.2026 20:36:40 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  13. 21.10.2026 20:28:16 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  14. 21.10.2026 20:26:15 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  15. 21.10.2026 20:25:05 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  16. 21.10.2026 20:22:58 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  17. 21.10.2026 20:21:56 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  18. 21.10.2026 20:18:51 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  19. 21.10.2026 20:17:46 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  20. 21.10.2026 20:16:46 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  21. 21.10.2026 20:15:42 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  22. 21.10.2026 20:14:42 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  23. 21.10.2026 20:08:08 · EMSC · update

    time: 2026-10-21T12:18:57.314+00:00 → 2026-10-21T12:18:57.313+00:00

  24. 21.10.2026 20:04:57 · SISTEM · recompute

    time: 2026-10-21T12:18:57.314Z → 2026-10-21 12:18:57.313+00:00 source count: 1 → 2 review status: automatic → reviewed confirming sources: emsc → emsc,usgs preferred source: 3 → 4

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