Mount Merapi is located in West Sumatra, Indonesia.
It claims the title of the most active volcano in Sumatra.
Pacific Ring of Fire also known as the Circum-Pacific Belt, is a path along the Pacific Ocean characterised by active volcanoes and frequent earthquakes.
It traces boundaries between several tectonic plates—including the Pacific, Juan de Fuca, Cocos, Indian-Australian, Nazca, North American, and Philippine Plates.