In this photo released by Indonesia's National Disaster Mitigation Agency (BNPB) Mount Semeru spews volcanic material during an eruption in Lumajang, East Java, Indonesia, Saturday, Jan. 16, 2021. The highest volcano on Indonesia's most densely populated island of Java, spewed hot clouds as far away as 4.5 kilometers (nearly 3 miles) on Saturday. (National Disaster Mitigation Agency via AP)