Asia Southeast Asia. Lava and ash spews 4km into the air as Indonesia volcano erupts again. Schools are closed and flights cancelled amid choking smoke and dust. Niniek Karmini, Jacobus Herin.

Indonesia, a Southeast Asian archipelago of 270 million people, has over 120 active volcanoes – more than anywhere else in the world. It sits along the Ring of Fire, a 25,000-mile (40,000 ...