A plume of ash has risen from Mount Anak Krakatau in Indonesia on Thursday.
The Indonesian volcano known as the “child” of the legendary Krakatau spewed a plume of ash high into the sky as molten lava streamed down from its summit.
Anak Krakatua emerged from the ocean half a century after Krakatau’s deadly 1883 eruption.
The volcano sprung to life on July 16 at 4.51pm local time (10.51am BST) for 44 seconds.
The current aviation colour code for the volcano eruption is set at orange, meaning a major volcanic eruption is imminent, underway or suspected.
Mount Anak Krakatau, located in the region of South Lampung, is still at Level 2 ‘caution’ – the second of four alert levels which was effective as of June 18.
The eruption has not affected flights to and from Radin Inten II Airport in Lampung, nor sea travel, including ferries on the Bakauheni – Merak route.
However with the alert, tourists and members of the public are advised to stay clear of Mount Anak Krakatua and the surrounding area.
An increase in activity of Mount Anak Krakatu was recorded from the end of June prompting an exclusion zone around the summit.
Devy Kamil Syahbana, of the Volcanic and Geological Disaster Mitigation Center, said: “There is a threat of eruption, prompting us to issue a recommendation to ban all activities within 1 kilometer radius from the crater and mountain area.”
“The recommendation has been issued because of the alert increase. [The eruption] is not a threat to flights or sea voyages. Tourist activities are also still allowed as long as people don’t climb the mountain,” he added.
Krakatua is a small island group in the Sunda Strait between the islands of Sumatra and Java is one of the world’s most famous volcanoes.
Anak Krakatua has been forming a new island since 1927 and remains highly active.
It emerged from beneath the surface of the sea following a big eruption in 1883 and is caused by a subduction of the Indo Australia plate beneath the Eurasia continental plate.
Krakatua erupted in a spectacular way in 1883 killing more than 30,000 people, many died as a result of the thermal injury from the blasts and many more were victims of the tsunamis which followed.
Mount Anak Krakatua has grown 800 metres from sea level since 1927.
However the impact of the current eruption is far from the eruption in 1883 which reached index six out of eight scales on the Volcanic Explosive Index (VEI).
Devy said: “The height of the smoke column in 1883 was more than 40 kilometres from sea level.
“Every one VEI increase is a 10 times difference. The current eruption resulted in a smoke column that was less than 1 kilometre high. Worrying about whether the impact will be as big as 1883 is unnecessary.”