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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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5.2

71 km ESE of ‘Ohonua, Tonga

18 October 2026, 22:32:28 (+03) 2026-10-18 19:32:28 UTC

3 sources: EMSC, USGS, GFZ mb
Did you feel this earthquake?
Magnitude
5.2 mb
Depth
10.0 km
Coordinates
-21.5410, -174.2956
Data consistency
85/100

Regional activity (100 km)

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

Approximate energy released

≈ 951 t TNT

3.98e+12 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.

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

1 earthquakes

By magnitude

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

By depth

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

No records.

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
EMSC-CSEM
TONGA
 5.3 mb 10.0 km 19:32:29.370 Δt 0.64 sn · 20.74 km · ΔM +0.1 Original record
USGS Earthquake Hazards Program Displayed
71 km ESE of ‘Ohonua, Tonga
 5.2 mb 10.0 km 19:32:28.734 Δt 0 sn · 0 km · ΔM 0 Original record
GFZ GEOFON
Tonga Islands
 5.4 mb 10.0 km 19:32:30.030 Δt 1.3 sn · 35.58 km · ΔM +0.2 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. 19.10.2026 00:02:31 · EMSC · update

    latitude: -21.541 → -21.5159 longitude: -174.2956 → -174.494 magnitude: 5.2 → 5.3 time: 2026-10-18T19:32:28.734+00:00 → 2026-10-18T19:32:29.370+00:00

  2. 18.10.2026 23:13:33 · SISTEM · recompute

    source count: 2 → 3 review status: automatic → reviewed confirming sources: emsc,gfz → emsc,usgs,gfz preferred source: 3 → 4

  3. 18.10.2026 23:13:32 · EMSC · update

    depth: 32 → 10 latitude: -21.504 → -21.541 longitude: -174.7047 → -174.2956 magnitude: 5.4 → 5.2 time: 2026-10-18T19:32:33.660+00:00 → 2026-10-18T19:32:28.734+00:00

  4. 18.10.2026 23:13:32 · SISTEM · recompute

    depth: 32 → 10 latitude: -21.504 → -21.541 longitude: -174.7047 → -174.2956 magnitude: 5.4 → 5.2 time: 2026-10-18T19:32:33.660Z → 2026-10-18 19:32:28.734+00:00

  5. 18.10.2026 22:52:27 · EMSC · update

    depth: 10 → 32 latitude: -21.481 → -21.504 longitude: -174.633 → -174.7047 time: 2026-10-18T19:32:30.030+00:00 → 2026-10-18T19:32:33.660+00:00

  6. 18.10.2026 22:52:27 · SISTEM · recompute

    depth: 10 → 32 latitude: -21.481 → -21.504 longitude: -174.633 → -174.7047 time: 2026-10-18T19:32:30.030Z → 2026-10-18 19:32:33.660+00:00

  7. 18.10.2026 22:52:05 · GFZ · update

    latitude: -21.45 → -21.481 longitude: -174.732 → -174.633 magnitude: 5.3 → 5.4 time: 2026-10-18T19:32:30.070+00:00 → 2026-10-18T19:32:30.030+00:00

  8. 18.10.2026 22:51:30 · EMSC · update

    depth: 50 → 10 latitude: -21.5627 → -21.481 longitude: -174.8444 → -174.633 magnitude: 5.3 → 5.4 time: 2026-10-18T19:32:36.250+00:00 → 2026-10-18T19:32:30.030+00:00

  9. 18.10.2026 22:51:30 · SISTEM · recompute

    depth: 50 → 10 latitude: -21.5627 → -21.481 longitude: -174.8444 → -174.633 magnitude: 5.3 → 5.4 time: 2026-10-18T19:32:36.250Z → 2026-10-18 19:32:30.030+00:00

  10. 18.10.2026 22:48:23 · SISTEM · recompute

    depth: 10 → 50 latitude: -21.45 → -21.5627 longitude: -174.732 → -174.8444 time: 2026-10-18T19:32:30.070Z → 2026-10-18 19:32:36.250+00:00 source count: 1 → 2 confirming sources: gfz → emsc,gfz preferred source: 5 → 3

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