NOAA NTWC

Tsunami situation after M6.6: near the Vanuatu Islands

Information

The covered warning centres issued information statements only for this event, no tsunami warning.

QuakeMap24 is not a warning authority. Follow instructions from the responsible local authorities for protective action.

Key facts

Magnitude
M6.6
Depth · NOAA NTWC
10.0 km
Event time
Oct 20, 2026, 4:20 AM UTC
First bulletin
Oct 20, 2026, 4:31 AM UTC
Latest bulletin
Oct 20, 2026, 4:31 AM UTC
Bulletins
1
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Situation map

WarningAdvisoryWatchThreat messageInformationOfficial forecast and observation pointsTide gauge

Official alert areas are not modelled inundation zones. The source country identifies the earthquake, not necessarily an affected coastline. Historical events and monitoring stations can be toggled separately.

Arrival times at coastal locations

The warning centre published no arrival times for coastal locations for this bulletin.

Measured waves at tide gauges

Own analysis, not official

A tsunami signal was detected at 0 of 17 analysed tide gauges.

Tide gaugeDistanceSignalMax. riseLargest excursionFirst arrivalBackground noise
Luganville
Vanuatu		241 kmno signal———0.9 cm
Litzlitz, Malekula
Vanuatu		309 kmno signal———0.7 cm
Lata_Wharf_SB
Solomon Islands		354 kmno signal———1.2 cm
Port Vila
Vanuatu		511 kmno signal———0.8 cm
Lenakel, Tanna
Vanuatu		732 kmno signal———1.8 cm
Ouvea
France		745 kmno signal———1.2 cm
Hienghene (New Caledonia)
France		760 kmno signal———0.7 cm
Lifou
France		798 kmno signal———1.8 cm
Honiara
Solomon Islands		799 kmno signal———0.4 cm
Maré 2 (New Caledonia, Loyalty Islands)
France		881 kmno signal———0.9 cm
Ouinne, New Caledonia
France		905 kmno signal———1.8 cm
Nouméa - Numbo (New Caledonia)
France		931 kmno signal———0.7 cm
Tarekukure_Wharf_SB
Solomon Islands		1,294 kmno signal———0.7 cm
Lautoka_FJ1,322 kmno signal———0.6 cm
Suva_Viti_Levu_FJ1,438 kmno signal———0.4 cm
Nauru
Nauru		1,492 kmno signal———1.6 cm
Lihou_Reef_AU
Australia		1,496 kmno signal———2.1 cm

Raw data from IOC/UNESCO and NOAA tide gauges, de-tided by QuakeMap24 (moving quadratic fit over ±90 minutes). A signal counts only if the first excursion of at least 5 cm and five times the background noise falls within the physically possible arrival window, the sea level stays clearly more disturbed than before the quake for two hours, and it exceeds anything this gauge showed beforehand. Shown is the largest rise above normal sea level. Noisy or gappy gauges are discarded. Wind, seiches or sensor faults can still mimic signals; official statements take precedence. Analysed: Oct 28, 2026, 6:15 AM UTC

Bulletin timeline

Area reported by source

near the Vanuatu Islands

  1. Information NOAA NTWC

    Valid until:

    Original authority text

    Original source language; no automatic translation.

    This is a Tsunami Information Statement for Alaska, British Columbia, Washington, Oregon, and California.

    This is a Tsunami Information Statement for Alaska, British Columbia, Washington, Oregon, and California. - Event details: Preliminary magnitude 6.6 (Mwp) earthquake / Lat: -13.900, Lon: 165.700 at 2026-10-20T04:20:37 UTC An information statement indicates that an earthquake has occurred, but does not pose a tsunami threat, or that a tsunami warning, advisory, or watch has been issued for another section of the ocean.

    There is no tsunami danger for the U.S. West Coast, British Columbia, or Alaska. Based on earthquake information and historic tsunami records, the earthquake is not expected to generate a tsunami. This will be the only U.S. National Tsunami Warning Center message for this event unless additional information becomes available. Refer to the internet site tsunami.gov for more information.

    Official source ↗

Historical tsunamis in the region

Historical tsunamis →