Dozens of flights to and from Indonesia’s Bali island were cancelled Monday after a volcano belched a colossal ash tower 18 kilometers (11 miles) into the sky, authorities said. The aviation disruption came just weeks after the same rumbling volcano caused dozens of flight cancellations to and from the popular resort island.

A huge volcanic eruption in Indonesia has forced airlines to cancel flights as they avoid the area where significant amounts of ash have flooded the sky.