Story highlights Everyone on Ambae island to be evacuated as volcanic activity increases

More than 144,000 have been evacuated around Mount Agung in Bali

(CNN) Thousands of people have been evacuated on the Indonesian island of Bali and on Ambae island in Vanuatu as two volcanoes threaten to erupt.

The entire population of Ambae is being moved from the path of the "increasingly active" Manaro volcano, also known as Lombenben, according to the Pacific nation's government.

On the Indonesian island of Bali, more than 144,000 people have been taken to shelters as authorities warn that Mount Agung, in the island's north, could erupt at any time.

Both volcanoes sit on the Pacific Ring of Fire , an area of intense seismic activity that stretches 40,000 kilometers (25,000 miles) from New Zealand to South America.

That they're showing signs of erupting at the same time is pure coincidence, said Benjamin Andrews, of the Smithsonian Institution's Global Volcanism Program.

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