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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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5.5

122 km W of Neiafu, Tonga

12 October 2026, 07:38:12 (+03) 2026-10-12 04:38:12 UTC

3 sources: EMSC, USGS, GFZ mww
Did you feel this earthquake?
Magnitude
5.5 mww
Depth
195.2 km
Coordinates
-18.7230, -175.1452
Data consistency
95/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
0
Last 30 days
2

Approximate energy released

≈ 2.7 kt TNT

1.12e+13 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): 2,8 PAGER: green 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

2 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 0
  • M3 0
  • M4 1
  • M5 1
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 0
  • 10–20 km 0
  • 20–40 km 0
  • 40–70 km 0
  • 70–150 km 0
  • 150+ km 2

Largest previous earthquakes within 100 km

Largest earthquakes in the platform catalogue and entries from historical catalogues (with citation).

No records.

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
TONGA
 5.5 mw 181.8 km 04:38:11.750 Δt 1.11 sn · 11.35 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
122 km W of Neiafu, Tonga
 5.5 mww 195.2 km 04:38:12.859 Δt 0 sn · 0 km · ΔM 0 Original record
GFZ GEOFON
Tonga Islands
 5.5 Mw 195.9 km 04:38:13.760 Δt 0.9 sn · 7.47 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) GEOFON Program, GFZ Helmholtz Centre for Geosciences — CC BY 4.0

Revision history

  1. 12.10.2026 09:41:58 · EMSC · update

    depth: 176.3 → 181.8 latitude: -18.664 → -18.6428 longitude: -175.153 → -175.0781 time: 2026-10-12T04:38:11.540+00:00 → 2026-10-12T04:38:11.750+00:00

  2. 12.10.2026 08:51:34 · EMSC · update

    depth: 195.2 → 176.3 latitude: -18.723 → -18.664 longitude: -175.1452 → -175.153 time: 2026-10-12T04:38:12.859+00:00 → 2026-10-12T04:38:11.540+00:00

  3. 12.10.2026 08:43:23 · USGS · update

    depth: 164.81 → 195.21 latitude: -18.528 → -18.723 longitude: -175.1442 → -175.1452 time: 2026-10-12T04:38:09.916+00:00 → 2026-10-12T04:38:12.859+00:00 location: 123 km W of Neiafu, Tonga → 122 km W of Neiafu, Tonga

  4. 12.10.2026 08:43:23 · SISTEM · recompute

    depth: 164.81 → 195.21 latitude: -18.528 → -18.723 longitude: -175.1442 → -175.1452 time: 2026-10-12T04:38:09.916Z → 2026-10-12 04:38:12.859+00:00

  5. 12.10.2026 08:34:48 · EMSC · update

    depth: 164.8 → 195.2 latitude: -18.528 → -18.723 longitude: -175.1442 → -175.1452 time: 2026-10-12T04:38:09.916+00:00 → 2026-10-12T04:38:12.859+00:00

  6. 12.10.2026 08:22:44 · GFZ · update

    magnitude: 5.7 → 5.5 magnitude type: mb → Mw

  7. 12.10.2026 08:03:59 · GFZ · update

    depth: 212.7 → 195.9 latitude: -18.659 → -18.677 longitude: -175.208 → -175.197 time: 2026-10-12T04:38:15.550+00:00 → 2026-10-12T04:38:13.760+00:00

  8. 12.10.2026 07:55:44 · SISTEM · recompute

    depth: 164.8 → 164.81 source count: 2 → 3 review status: automatic → reviewed magnitude type: mw → mww confirming sources: emsc,gfz → emsc,usgs,gfz preferred source: 3 → 4

  9. 12.10.2026 07:54:54 · EMSC · update

    depth: 212.7 → 164.8 latitude: -18.659 → -18.528 longitude: -175.208 → -175.1442 magnitude: 5.7 → 5.5 time: 2026-10-12T04:38:15.550+00:00 → 2026-10-12T04:38:09.916+00:00 magnitude type: mb → mw

  10. 12.10.2026 07:54:54 · SISTEM · recompute

    depth: 212.7 → 164.8 latitude: -18.659 → -18.528 longitude: -175.208 → -175.1442 magnitude: 5.7 → 5.5 time: 2026-10-12T04:38:15.550Z → 2026-10-12 04:38:09.916+00:00 magnitude type: mb → mw

  11. 12.10.2026 07:51:44 · GFZ · update

    depth: 197.7 → 212.7 latitude: -18.638 → -18.659 longitude: -174.89 → -175.208 magnitude: 5.8 → 5.7 time: 2026-10-12T04:38:12.030+00:00 → 2026-10-12T04:38:15.550+00:00

  12. 12.10.2026 07:51:43 · EMSC · update

    depth: 190 → 212.7 latitude: -18.6587 → -18.659 longitude: -174.9616 → -175.208 magnitude: 5.8 → 5.7 time: 2026-10-12T04:38:12.010+00:00 → 2026-10-12T04:38:15.550+00:00

  13. 12.10.2026 07:51:43 · SISTEM · recompute

    depth: 190 → 212.7 latitude: -18.6587 → -18.659 longitude: -174.9616 → -175.208 magnitude: 5.8 → 5.7 time: 2026-10-12T04:38:12.010Z → 2026-10-12 04:38:15.550+00:00

  14. 12.10.2026 07:50:30 · EMSC · update

    depth: 197.2 → 190 latitude: -18.7042 → -18.6587 longitude: -174.9227 → -174.9616 time: 2026-10-12T04:38:12.370+00:00 → 2026-10-12T04:38:12.010+00:00

  15. 12.10.2026 07:50:30 · SISTEM · recompute

    depth: 197.2 → 190 latitude: -18.7042 → -18.6587 longitude: -174.9227 → -174.9616 time: 2026-10-12T04:38:12.370Z → 2026-10-12 04:38:12.010+00:00

  16. 12.10.2026 07:47:31 · SISTEM · recompute

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

  17. 12.10.2026 07:47:23 · EMSC · update

    depth: 115 → 197.2 latitude: -18.9498 → -18.7042 longitude: -174.8597 → -174.9227 time: 2026-10-12T04:38:07.760+00:00 → 2026-10-12T04:38:12.370+00:00

  18. 12.10.2026 07:47:23 · SISTEM · recompute

    depth: 115 → 197.2 latitude: -18.9498 → -18.7042 longitude: -174.8597 → -174.9227 time: 2026-10-12T04:38:07.760Z → 2026-10-12 04:38:12.370+00:00

  19. 12.10.2026 07:46:30 · EMSC · update

    latitude: -18.9704 → -18.9498 longitude: -174.805 → -174.8597 magnitude: 5.5 → 5.8 time: 2026-10-12T04:38:07.940+00:00 → 2026-10-12T04:38:07.760+00:00 magnitude type: mw → mb

  20. 12.10.2026 07:46:30 · SISTEM · recompute

    latitude: -18.9704 → -18.9498 longitude: -174.805 → -174.8597 magnitude: 5.5 → 5.8 time: 2026-10-12T04:38:07.940Z → 2026-10-12 04:38:07.760+00:00 magnitude type: mw → mb

  21. 12.10.2026 07:45:29 · EMSC · update

    magnitude type: m → mw

  22. 12.10.2026 07:45:29 · SISTEM · recompute

    magnitude type: m → mw

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