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2022 Hunga-Tonga mega-tsunami simulation

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2022 Hunga-Tonga mega-tsunami simulation shows “lucky escape” for urban centres

Sunday, April 16, 2023 - 16:08.  Updated on Sunday, April 16, 2023 - 17:11.
Nuku'alofa, Tonga
A 15-megaton volcanic explosion from Hunga-Tonga Hunga-Ha'apai, one of the largest natural explosions in more than a century, generated a mega-tsunami with waves up to 85 meters (279 feet) high one minute after the explosion of "Blast 5", and hitting Tonga's coastlines, up to 45-meters high (148 feet) at Tofua Island, and waves up to 17 meters (56 feet) on Tongatapu, the country’s most populated island on 15 January 2022. A new study found that the Tonga tsunami was similar in size to the one caused by the eruption of Krakatoa in 1883 and generated enormous waves, but claimed few lives.

фотки, видео по ссылке:


архивированно отсюда: https://matangitonga.to/2023/04/16/2022 … an-centres - однако через пару дней эта страница перестанет быть доступна (поэтому и архивированно). Впрочем , там в статье есть ссылки на оригинал и ВИДЕО СИМУЛЯЦИИ ЦУНАМИ: Download an animation of the tsunami propagation across the Tonga archipelago. Credit: Steven N. Ward - Institute of Geophysics and Planetary Physics, University of California Santa Cruz, U.S.A.  https://spaces.hightail.com/receive/HOzAv6bawk



Да это уже выжимка из полного исследования https://www.science.org/doi/10.1126/sciadv.adf5493



Интернет по оптическому кабелю к Vava'u и Ha'apai восстановлен 12 июля :-) Проложили 108км нового кабеля. За 8 дней. Для истории сохраним текст здесь:

https://matangitonga.to/2023/07/13/tong … estruction

Tonga’s domestic submarine cable repaired after HTHH destruction
Thursday, July 13, 2023 - 17:09

Nuku'alofa, Tonga

Repairs on the domestic submarine cable system connecting Tongatapu to Ha’apai and Vava’u were completed  and back in service on Wednesday night, 12 July, after it was destroyed by the Hunga-Tonga Hunga-Ha’apai volcanic eruption in January 2022.

Tonga Cable Ltd today stated that the cable system had been down for almost 18-months, since it was destroyed by the eruption. The amount of cable used in the reconnecting of the cable system was just over 108km.

"The reason it has taken so long to get the domestic cable repaired is due to the lack of the required amount and type of cable to carry out the repair job. It took 5 months to confirm the amount of cable to order from ASN.

“This needed to await the survey results which were being conducted by the New Zealand organization known as the National Institute of Water and Atmospheric Research (NIWA) in April/May 2022."

Once the order was placed it took ASN took about seven-months to manufacture our cable order and it took around four-months for the order to be shipped from ASN in France and another two-months for the cable ship to get to Tonga.

Meanwhile, the cable repair ship, C/S Lodbrog owned and operated jointly by Alcatel Submarine Networks (ASN) and Optic Marine (OMS) arrived into Tonga waters, on 5 July.

Two representatives, Siumafua Moala, engineer from TCL, and Siteni ‘Ahio, senior engineer from MEIDECC, joined the ship carrying a crew of 57 during its eight-day repair task.

TCL acknowledged the support of the Government of Tonga and the financial assistance provided by the Australian High Commission towards the repair of the Tonga Cable domestic submarine cable system. Likewise family and friends on the two outer islands were also acknowledged for their patience, during the past challenging 18-months.