December 27, 2018 / 4:18 AM / 6 months ago

CORRECTED-UPDATE 1-Indonesia reroutes all flights around erupting Anak Krakatau volcano

(Corrects paragraph 2 to say Sunda Strait is between Java and Sumatra islands)

By Bernadette Christina Munthe and Cindy Silviana

JAKARTA, Dec 27 (Reuters) - Indonesia on Thursday raised the alert level for the erupting Anak Krakatau volcano to the second-highest, and ordered all flights to steer clear, days after it triggered a tsunami that killed at least 430 people.

A crater collapse on the volcanic island at high tide on Saturday sent waves up to 5 metres (16 feet) high smashing into the coast on the Sunda Strait, between the islands of Java and Sumatra.

Authorities have warned that the crater of Anak Krakatau, or child of Krakatau, remains fragile, raising fears of another collapse and tsunami, and have urged residents to stay away from the coast.

There are also fears of a bigger eruption.

The volcano has been rumbling on and off since July but has been particularly active since Sunday, spewing lava and rocks, and sending huge clouds of ash up to 3,000 metres into heavily overcast skies.

The national geological agency, in raising the alert level to the second-highest, set a 5-km exclusion zone around the island.

“Since December 23, activity has not stopped ... We anticipate a further escalation,” said Antonius Ratdomopurbo, secretary of the geological agency.

A thin layer of volcanic ash has been settling on buildings, vehicles and vegetation along the west coast of Java since late on Wednesday, according to images shared by the national disaster mitigation agency.

Authorities said the ash was not dangerous, but advised residents to wear masks and goggles when outside, while aircraft were ordered away.

“All flights are rerouted due to Krakatau volcano ash on red alert,” the government air-traffic control agency AirNav said in a release.

The civil aviation authority said no airports would be affected. The capital, Jakarta, is about 155 km east of the volcano.

In 1883, the volcano then known as Krakatoa erupted in one of the biggest blasts in recorded history, killing more than 36,000 people in a series of tsunami and lowering the global surface temperature by one degree Celsius with its ash.

Anak Krakatau is the island that emerged from the area in 1927 and has been growing ever since.

Indonesia is a vast archipelago that sits on the Pacific “Ring of Fire”. This year, the country has suffered its worst annual death toll from disasters in more than a decade.

The latest tsunami disaster, coming during the Christmas season, evoked memories of the Indian Ocean tsunami triggered by an earthquake on Dec. 26, 2004, which killed 226,000 people in 14 countries, including more than 120,000 in Indonesia.

Additional reporting by Nilufar Rizki, Jessica Damiana, Tabita Diela Writing by Kanupriya Kapoor Editing by Robert Birsel

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