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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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3.5

Aegean Sea

31 October 2026, 00:43:10 (+03) 2026-10-30 21:43:10 UTC

3 sources: KANDILLI, EMSC, NOA MLh
Did you feel this earthquake?
Magnitude
3.5 MLh
Depth
16.9 km
Coordinates
39.6913, 24.2281
Data consistency
89/100

Regional activity (100 km)

Last 24 hours
5
Last 7 days
30
Last 30 days
224

Approximate energy released

≈ 2.7 t TNT

1.12e+10 J

Approximated with the Gutenberg–Richter relation (log E = 1.5 M + 4.8); depends on magnitude type. Gutenberg & Richter (1956).

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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.

Nearby places

Nearby faults (50 km)

No mapped fault within 50 km.

Last year, within 100 km

250 earthquakes

By magnitude

  • M0 0
  • M1 78
  • M2 134
  • M3 31
  • M4 6
  • M5 1
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 69
  • 10–20 km 155
  • 20–40 km 24
  • 40–70 km 1
  • 70–150 km 0
  • 150+ km 1

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

Sources report different values.
Agency Magnitude Depth Time (UTC) Difference from master Original record
Kandilli Rasathanesi (KOERI)
YUNANISTAN
 3.9 Mw 15.9 km 21:43:10.000 Δt 0.12 sn · 7.64 km · ΔM +0.4
EMSC-CSEM
AEGEAN SEA
 3.6 ml 16.8 km 21:43:10.610 Δt 0.49 sn · 0 km · ΔM +0.1 Original record
NOA – Institute of Geodynamics Displayed
Aegean Sea
 3.5 MLh 16.9 km 21:43:10.124 Δt 0 sn · 0 km · ΔM 0

This value summarises agreement between sources; it is not a measure of scientific accuracy. Boğaziçi Üniversitesi Kandilli Rasathanesi ve Deprem Araştırma Enstitüsü (KRDAE) Bölgesel Deprem-Tsunami İzleme ve Değerlendirme Merkezi — KRDAE kullanım izni ile Euro-Mediterranean Seismological Centre (EMSC-CSEM) — CC BY 4.0 National Observatory of Athens, Institute of Geodynamics (NOA-IG) — NOA kullanım koşulları

Revision history

  1. 04.11.2026 10:34:19 · KANDILLI · update

    depth: 13.4 → 15.9 latitude: 39.7718 → 39.7588 longitude: 24.2735 → 24.2455 magnitude: 3.6 → 3.9 magnitude type: ML → Mw

  2. 31.10.2026 12:53:42 · EMSC · update

    magnitude: 3.5 → 3.6 time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.610+00:00

  3. 31.10.2026 01:49:21 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  4. 31.10.2026 01:48:25 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  5. 31.10.2026 01:48:24 · NOA · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  6. 31.10.2026 01:47:17 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  7. 31.10.2026 01:41:54 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  8. 31.10.2026 01:39:51 · NOA · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  9. 31.10.2026 01:37:44 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  10. 31.10.2026 01:36:44 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  11. 31.10.2026 01:35:41 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  12. 31.10.2026 01:31:32 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  13. 31.10.2026 01:23:24 · NOA · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  14. 31.10.2026 01:22:07 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  15. 31.10.2026 01:21:00 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  16. 31.10.2026 01:18:53 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  17. 31.10.2026 01:16:49 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  18. 31.10.2026 01:15:46 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  19. 31.10.2026 01:15:02 · NOA · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  20. 31.10.2026 01:13:38 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  21. 31.10.2026 01:09:06 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  22. 31.10.2026 01:06:56 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  23. 31.10.2026 01:06:52 · NOA · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  24. 31.10.2026 01:04:55 · NOA · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  25. 31.10.2026 01:04:52 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  26. 31.10.2026 01:03:20 · NOA · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  27. 31.10.2026 01:02:48 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  28. 31.10.2026 01:01:45 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  29. 31.10.2026 01:00:47 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  30. 31.10.2026 00:58:45 · NOA · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  31. 31.10.2026 00:58:27 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  32. 31.10.2026 00:56:41 · NOA · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  33. 31.10.2026 00:55:20 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  34. 31.10.2026 00:54:40 · NOA · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  35. 31.10.2026 00:54:14 · SISTEM · recompute

    source count: 2 → 3 confirming sources: emsc,noa → kandilli,emsc,noa

  36. 31.10.2026 00:52:34 · NOA · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  37. 31.10.2026 00:52:04 · EMSC · update

    time: 2026-10-30T21:43:10.124+00:00 → 2026-10-30T21:43:10.123+00:00

  38. 31.10.2026 00:50:35 · SISTEM · recompute

    depth: 10 → 16.85 latitude: 39.69063 → 39.69132 longitude: 24.23172 → 24.22806 magnitude: 3.3 → 3.5 time: 2026-10-30T21:43:10.373Z → 2026-10-30 21:43:10.124+00:00

  39. 31.10.2026 00:50:35 · NOA · update

    depth: 10 → 16.85 latitude: 39.69063 → 39.69132 longitude: 24.23172 → 24.22806 magnitude: 3.3 → 3.5 time: 2026-10-30T21:43:10.373+00:00 → 2026-10-30T21:43:10.123+00:00

  40. 31.10.2026 00:49:56 · SISTEM · recompute

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

  41. 31.10.2026 00:48:23 · NOA · update

    time: 2026-10-30T21:43:10.373+00:00 → 2026-10-30T21:43:10.372+00:00

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