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A volcano on Bali, Indonesia, might soon have a massive eruption. It's already spewing out ash, steam and some lava. Screenshot/Telkomsel

The Mount Agung volcano is erupting and you can watch it happen live.

A stream from telecommunications company Telkomsel shows the Indonesian volcano, on the island Bali, puffing ash into the sky. The site has shown signs of activity for the last couple of months, including more in the last few days, and there have been some reports of lava eruptions. The site has fallen short of spewing large amounts of molten rock from its guts onto Earth’s surface, but authorities have warned that such a heavy eruption might be imminent.

The ash and gas rising thousands of feet into the air has already interfered with aviation, causing some airlines to cancel flights, stranding a lot of locals and tourists. Many people have evacuated the area, fearing the danger a larger eruption would cause, but many others remain in harm’s way.

“We will continue to see eruptions like this on similar scales, but we cannot predict when Mount Agung will really erupt,” a volcanologist told Sky News.

That publication said that Mount Agung last erupted in 1963, in an event that killed 1,600 people.

Volcanic eruptions kill people in a number of different ways. They shoot out rocks as projectiles, cause tsunamis, and send out fast-moving clouds of rock, gas and ash called pyroclastic flows that instantly kill people with their heat. Those pyroclastic flows move more quickly than people can run or cars can drive, so they are difficult to escape.

Mount Agung is listed under a red alert on the Volcano Observatory Notice for Aviation, which indicates the hazard a volcano poses to planes. VONA says the volcanic activity is being accompanied by tremors and small earthquakes, and its ash cloud is moving west-southwest, reaching as high as almost 23,000 feet into the air.