Mount Merapi spews volcanic materials during an eruption as seen from Sleman, Indonesia, Sunday, June 21, 2020. The country's most volatile volcano on Sunday spewed ash and hot gas in a massive column as high as 6 kilometers (3.7 miles) into the sky. Indonesia, an archipelago of 270 million people, is prone to earthquakes and volcanic activity because it sits along the Pacific "Ring of Fire," a horseshoe-shaped series of fault lines around the ocean. (AP Photo/Slamet Riyadi)