Tsunami advisory in effect for US as waves hit Tonga following volcanic eruption

A tsunami warning has been issued for the Tonga Islands. Tsunami warnings have also been issued for the North Island of New Zealand and the west coast of the United States from California to Alaska, as well as British Columbia in Canada.

Satellite images show a massive ash cloud and shock waves spreading from the eruption.

Waves crossed the coastline of Tonga’s capital, Nuku’alofa, on Saturday, rolling on coastal roads and inundating property, according to CNN’s Radio New Zealand (RNZ).

RNZ, citing local media reports, reported that a convoy of police and troops rushed the king to a villa in Mata Ki Iwa, the sixth King of Tonga Tubu was evacuated from the royal palace.

RNZ said residents headed to higher ground as waves swept across the palace grounds, waterfront and main street.

RNZ said ash was falling from the sky in Nuku’alofa on Saturday evening and the phone was lost.

The Hunga-Tonga-Hongga-Hapai volcano erupted for the first time on Friday, sending a plume of ash 20 kilometers (12.4 miles) into the air, according to RNZ.

A second eruption struck Saturday at 5:26 p.m. local time, RNZ reports.

The Australian Bureau of Meteorology said it recorded a 1.2-meter (about 4 feet) high tsunami near Nuku’alofa at 5:30 p.m. local time on Saturday.

The Pacific Tsunami Warning Center reported tsunami waves as high as 2.7 feet (83 cm) by gauges in Nuku’alofa and waves as high as two feet in Pago Pago, the capital of American Samoa, Reuters reported.

Jesse Toisino, Fiji One TV reporter, Spread A video on Twitter shows big waves washing the beach, and people trying to escape the incoming waters in their cars. “It’s literally dark in parts of Tonga and people are rushing to safety after the eruption,” he said in another tweet.

The volcano is located about 30 kilometers (18.6 miles) southeast of Funuafu island in Tonga, according to RNZ, and about 65 kilometers (40 miles) north of Nuku’alofa.

In addition to the tsunami warning, Tonga’s meteorological services have issued warnings of heavy rain, flash floods and strong winds in land and coastal waters.

The nearby island of Fiji has also issued a general advice asking people living in low-lying coastal areas to “go to safety in anticipation of strong currents and dangerous waves”.

A tsunami warning is also in effect in the Pacific nation of Vanuatu, according to the National Disaster Management Office, with residents advised to stay away from the coast and look for higher ground.

The Samoa Meteorological Service said a tsunami watch is in effect for all low-lying coastal areas of Samoa. “All people who live in low-lying coastal areas are advised to stay away from beach areas,” the agency said, and the public should refrain from visiting coastal areas.

Warning to the United States

A tsunami warning is now in effect for the US West Coast including California, Oregon, Washington and Alaska, according to the NWS Tsunami Warning Center in Palmer, Alaska.

“We saw the wave moving across the island of Hawaii,” Dave Snyder, tsunami warning coordinator at the National Tsunami Warning Center in Palmer, Alaska, told CNN.

Current observations indicate that the wave height is one to two feet and is heading towards the Pacific coast of the mainland United States. Estimated time of arrival along the California coast is 7 AM to 7:30 AM PT.

Speaking on the phone, Snyder noted, “We don’t have a really good forecast because this event is based on a volcano, not an earthquake.”

Snyder notes that this is a current rather than a tsunami warning in effect for the west coast of the United States after the Tonga eruption.

Strong warnings were issued by the National Weather Service in Seattle for the US Pacific coast on Saturday. NWS Seattle tweeted: “Stay off shore and out of ports and marinas in these areas.”

The agency went on to warn, “It is possible that strong currents and larger waves occur along these coastal areas. The first wave may not be the largest.”

“Keep staying off the water and offshore along coastal areas and keep watching for updates.”

New Zealand on alert

A tsunami warning has also been issued for coastal areas on the north and east coast of New Zealand’s North Island and the Chatham Islands, where “strong, unusual currents and sudden unexpected eruptions ashore” are expected, according to New Zealand’s National Emergency Management Agency. .

The official New Zealand Met Office said its weather stations across the country had observed a “pressure rise” on Saturday night due to the eruption.

Satellite image taken by Himawari 8, Japan's weather satellite, and released by the agency, shows an undersea volcanic eruption in the Pacific nation of Tonga on Saturday, January 15, 2022.

Scientist Emily Lin, of New Zealand’s National Water and Atmospheric Research Institute, told New Zealand’s Science Information Center that the eruption was “very significant”.

She said: “The shock wave resulting from it is clearly visible in the satellite images and there are reports of the eruption of the volcano heard, at least in places as far away as New Zealand.” “The tsunami from the explosion reached more than 2,500 km recorded on measuring instruments across Aotearoa.”

Lin said volcanic tsunamis are much less common than underwater earthquake tsunamis.

Lin added that a smaller eruption in late 2014/early 2015 built the crater above the water’s surface, but it’s not yet clear exactly how Hang-Tonga-Henga-Hapai erupted on this occasion. “When we see what’s left of the island after this eruption is over, we can start to piece together the pieces of what happened,” she said.

Professor Shane Cronin, from the University of Auckland’s School of Environment, told New Zealand Science Media that research into historical eruptions by the same volcano suggests that the current eruption cycle could last for weeks or months “and that other eruptions of similar size to the January 15 event 2022”.

“The volcanic eruption is likely to cause large amounts of ash (centimeter to 10 centimeters) to fall in Tongatapu as well as the Hapai island group,” he said. “Help will be needed to restore the supply of drinking water. The people of Tonga must also remain vigilant for more eruptions especially tsunamis with short notice and they must avoid low-lying areas.”

A previous tsunami warning issued for American Samoa has since been rescinded, according to the NWS Pacific Tsunami Warning Center.

According to the Pacific Tsunami Warning Center, there is no risk of a tsunami over Guam and the Commonwealth of the Northern Mariana Islands from a “long-range eruption.”

The volcano was active as of December 20, but was declared dormant on January 11, according to RNZ.

CNN’s Hayley Brink contributed to this report.


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