Semeru, also known as Mount Semeru, stands as an active volcano situated in East Java, Indonesia. Positioned within a subduction zone, where the Indo-Australian plate subducts beneath the Eurasia plate, it holds the distinction of being the tallest mountain on the island of Java. The name “Semeru” is derived from “Meru,” which signifies the central world mountain in Hinduism, or “Sumeru,” the revered abode of gods.