, killing nine people, cancelling scores of international flights to Bali and forcing the evacuation of thousands.

There was no immediate confirmation of flight disruptions on Monday, but the Volcanic Ash Advisory Center in Darwin, Australia, which is responsible under the international advisory network for the region including Indonesia, did issue a red alert notice, indicating possible impacts.

A red alert under the VAAC network indicates an eruption is likely or already underway "with significant emission of ash into the atmosphere."

Laki-Laki, which means man in Indonesian, is twinned with the calmer but taller 5,587-foot volcano named Perempuan, after the Indonesian word for woman.

Indonesia, a vast archipelago nation, experiences frequent seismic and volcanic activity due to its position on the Pacific "Ring of Fire".