Recently, Semeru volcano erupted in Indonesia’s East Java province. Other volcanoes, such as the Merapi volcano (Java) and Sinabung volcano (Sumatra), also erupted recently.

Key Points

  • Semeru Volcano:
    • Semeru – also known as “The Great Mountain” – is the highest volcano in Java and one of the most active.
    • It previously erupted in December, 2019.
    • Indonesia, with the maximum number of active volcanoes in the world, is prone to seismic upheaval due to its location on the Pacific’s Ring of Fire.
    • Semeru volcano is also the part of the Island arcs formed by the subduction of the Indo-Australian plate below Sunda Plate (part of Eurasian Plate). The trench formed here is called Sunda trench whose major section is the Java Trench.
  • Pacific Ring of Fire:
    • The Ring of Fire, also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.
    • It traces boundaries between several tectonic plates—including the Pacific, Cocos, Indian-Australian, Nazca, North American, and Philippine Plates.

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