Overall Green Earthquake alert in New Caledonia on 05 Dec 2018 04:18 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve alerts, information exchange and coordination in the first phase after major sudden-onset disasters.

M 7.5 in New Caledonia on 05 Dec 2018 04:18 UTC

2018-12-05 05:39 message from NTWC

Key information extracted from original GTS message :

Evaluation

An earthquake with a preliminary magnitude of 7.6 occurred southeast of the loyalty ISLANDS at 0418 UTC on wednesday december 5 2018
TSUNAMI waves have been observed
Based on all available data hazardous TSUNAMI waves are forecast for some coasts

Threat Forecast

TSUNAMI waves reaching 1 to 3 meters above the tide level are possible along some coasts of NEW caledonia... and vanuatu.
TSUNAMI waves reaching 0.3 to 1 meters above the tide level are possible for some coasts of fiji.
TSUNAMI waves are forecast to be less than 0.3 meters above the tide level for the coasts of AMERICAN samoa... antarctica... australia... chile... china... chuuk... colombia... COOK islands... COSTA rica... ecuador... EL salvador... FRENCH polynesia... guam... guatemala... hawaii... honduras... howland and baker... indonesia... japan... JARVIS island... johnston atoll... kermadec islands... kiribati... kosrae... malaysia... MARSHALL islands... mexico... midway island... nauru... NEW zealand... nicaragua... niue... NORTHERN marianas... northwestern hawaiian islands... palau... palmyra island... panama... PAPUA NEW guinea... peru... philippines... PITCAIRN islands... pohnpei... russia... samoa... SOLOMON islands... taiwan... tokelau... tonga... tuvalu... wake island... WALLIS and futuna... and yap.
Actual amplitudes at the coast MAY vary from forecast amplitudes due to uncertainties in the forecast and local features. in particular maximum TSUNAMI amplitudes on atolls and at locations with fringing or barrier reefs will likely be much smaller than the forecast indicates.
For other areas covered by this product a forecast has not yet been computed. the forecast will be expanded if necessary in subsequent products.

Tsunami Observations

The following are tsunami wave observations from coastal and/or deep-ocean sea level gauges at the indicated locations the maximum tsunami height is measured with respect to the normal tide level

GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)
Thio New Caledonia	-21.6	166.2	05: 26	0.15	10
Ouinne New Caledon	-22	166.7	05: 14	0.48	06
Lifou New Caledoni	-20.9	167.3	05: 22	0.29	06
Mare New Caledonia	-21.5	167.9	05: 19	0.43	10
Lenakel Vu	-19.5	169.3	05: 05	0.72	06

Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)
PTWC	Thio New Caledonia	-21.6	166.2	05: 26	0.15	10
PTWC	Ouinne New Caledon	-22	166.7	05: 14	0.48	06
PTWC	Lifou New Caledoni	-20.9	167.3	05: 22	0.29	06
PTWC	Mare New Caledonia	-21.5	167.9	05: 19	0.43	10
PTWC	Lenakel Vu	-19.5	169.3	05: 05	0.72	06

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