Mount Semeru, Indonesia

Mount Semeru, Indonesia’s highest volcano, has been consistently active with notable eruptions in late 2020 and early 2021. These eruptions have generated pyroclastic flows—fast-moving avalanches of hot gas and rock—and ashfalls that have affected nearby communities and agricultural lands.

Semeru's activity serves as a reminder of Indonesia's vulnerability to volcanic hazards, with millions of people living in close proximity to active volcanoes along the archipelago's volcanic belt.