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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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4.6

260 km WNW of Houma, Tonga

11 October 2026, 13:05:41 (+03) 2026-10-11 10:05:41 UTC

3 sources: EMSC, USGS, GFZ mb
Did you feel this earthquake?
Magnitude
4.6 mb
Depth
512.9 km
Coordinates
-20.3859, -177.6638
Data consistency
96/100

Regional activity (100 km)

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

Approximate energy released

≈ 120 t TNT

5.01e+11 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

5 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 0
  • M3 0
  • M4 5
  • M5 0
  • 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 5

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
EMSC-CSEM
FIJI REGION
 4.7 mb 531.5 km 10:05:42.800 Δt 1.39 sn · 8.04 km · ΔM +0.1 Original record
USGS Earthquake Hazards Program Displayed
260 km WNW of Houma, Tonga
 4.6 mb 512.9 km 10:05:41.414 Δt 0 sn · 0 km · ΔM 0 Original record
GFZ GEOFON
Fiji Islands Region
 4.9 mb 525.7 km 10:05:42.380 Δt 0.97 sn · 0.99 km · ΔM +0.3 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 00:32:51 · EMSC · update

    depth: 512.9 → 531.5 latitude: -20.3859 → -20.3245 longitude: -177.6638 → -177.7049 magnitude: 4.6 → 4.7 time: 2026-10-11T10:05:41.414+00:00 → 2026-10-11T10:05:42.800+00:00

  2. 11.10.2026 13:27:34 · SISTEM · recompute

    depth: 512.9 → 512.92 source count: 2 → 3 review status: automatic → reviewed confirming sources: emsc,gfz → emsc,usgs,gfz preferred source: 3 → 4

  3. 11.10.2026 13:27:30 · SISTEM · recompute

    depth: 525.7 → 512.9 latitude: -20.393 → -20.3859 longitude: -177.658 → -177.6638 magnitude: 4.9 → 4.6 time: 2026-10-11T10:05:42.380Z → 2026-10-11 10:05:41.414+00:00 source count: 1 → 2 confirming sources: gfz → emsc,gfz preferred source: 5 → 3

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