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Huge Tonga volcanic eruption caused 'significant damage'

Updated: 2022-01-17 09:48
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Drownings in Peru

Tonga's King Tupou VI was reported to have been evacuated from the Royal Palace in Nuku'alofa and taken by police convoy to a villa well away from the coastline.

A handout satellite image made available by the Tonga Meteorological Services, Government of Tonga shows an explosive eruption of the Hunga Tonga-Hunga Ha'apai volcano, located in the South Pacific Kingdom of Tonga, on Jan 15, 2022. [Photo/IC]

Dramatic satellite images showed the long, rumbling eruption of the Hunga Tonga-Hunga Ha'apai volcano spew smoke and ash in the air, with a thunderous roar heard 10,000 kilometers away in Alaska.

The eruption triggered tsunamis across the Pacific with waves of 1.74 meters measured in Chanaral, Chile, more than 10,000 kilometers away, and smaller waves seen along the Pacific coast from Alaska to Mexico.

Two women drowned on a beach in northern Peru due to "anomalous waves" caused by the eruption, authorities said Sunday, and dozens of people required rescue from flooding in the south of the country.

In California, the city of Santa Cruz was hit by flooding due to a tidal surge generated by the tsunami, while waves of around 1.2 meters hit along Japan's Pacific coast.

'Just incredible'

The US Geological Survey recorded Saturday's eruption as equivalent to a 5.8-magnitude earthquake at zero depth.

The volcano's eruption lasted at least eight minutes and sent plumes of gas, ash and smoke several kilometers into the air.

New Zealand scientist Marco Brenna described the impact as "relatively mild" but said another eruption with a much bigger impact could not be ruled out.

The eruption was so powerful it was even heard in Alaska, the UAF Geophysical Institute tweeted, saying the fact it was audible was "fairly unique."

It cited Alaska Volcano Observatory scientists David Fee as recalling "only a couple other volcanic eruptions doing something like this" -- namely, the 19th-century eruption of Indonesia's Krakatau, and Alaska's Novarupta, the most powerful volcanic eruption of the 20th century.

The Fife weather station in Scotland tweeted it was "just incredible to think of the power that can send a shockwave around the world" after the eruptions produced a jump in its air pressure graph.

Hunga-Tonga-Hunga-Ha'apai, which lies about 65 kilometers north of Nuku'alofa, has a history of volatility.

In recent years it breached sea level during a 2009 eruption, while in 2015 it spewed so many large rocks and ash into the air that when they settled, a new island had formed two kilometers long by one kilometer wide and 100 meters high.

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