LUMAJANG, INDONESIA, JANUARY 17: An official monitors the seismograph used to monitor the eruption of Mount Semeru in Lumajang, East Java Province, on January 17, 2021. Mount Semeru erupted on January 16, 2021, in Lumajang Regency, East Java, Indonesia. The volcano launched a hot cloud with a gliding distance of about 4.5 kilometers (km). Suryanto / Anadolu Agency/ABACAPRESS.COM