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Photo provided by Indonesia's National Disaster Management Agency (BNPB) shows Mount Semeru spewing volcanic materials in Lumajang, East Java, Indonesia, Jan. 16, 2021. (BNPB/Handout via Xinhua)
Photo provided by Indonesia's National Disaster Management Agency (BNPB) shows Mount Semeru spewing volcanic materials in Lumajang, East Java, Indonesia, Jan. 16, 2021. (BNPB/Handout via Xinhua)