The ash cloud above Mount Lewotobi Laki-laki on Monday was about four times taller than the one produced by an eruption there last month.

Indonesia’s rumbling Mount Lewotobi Laki Laki erupted Monday, sending a column of volcanic materials as high as 18 kilometers (11 miles) into the sky and depositing ash on villages.

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.