2 Times The Vibration Of Cold Lava Floods Occurs On Mount Semeru

Mount Semeru was observed at PPGA Semeru on Mount Sawur, Lumajang Regency, Sunday (19/3/2023). (ANTARA/HO-PVMBG)

LUMAJANG - Semeru Volcano Observation Post (PPGA) officers again recorded two cold lava flood vibrations on Mount Semeru in Lumajang Regency, East Java, Sunday, March 19. The observation period is 00.00-06.00 WIB and 12.00-18.00 WIB. PPGA Semeru officer Mukdas Sofian said that during the observation period on Sunday at 00.00-06.00 WIB, there was one earthquake of cold lava flood vibration with an amplitude of 15 mm and an earthquake length of 1,740 seconds. "In addition, the seismic observations were also recorded 20 earthquakes of eruptions/eruptions, one harmonic, and three distant tectonic earthquakes with an amplitude of 11-25 mm," he said in a written report received, Antara, Sunday, March 19 evening. Then in the observation period at 12.00-18.00 WIB, one earthquake was recorded with an amplitude of 20 mm and an earthquake length of 1,800 seconds. "So far, the cold lava flood of Mount Semeru is still under control and safe to be on the river route," said Head of the Lumajang Regency BPBD Emergency, Rehabilitation and Reconstruction Division Joko Sambang. He explained that Mount Semeru is still level III or on standby, so people are prohibited from carrying out any activities in the southeast sector along Besuk Kobokan as far as 13 km from the summit (the center of the eruption). Beyond that distance, the community is also not allowed to carry out activities at a distance of 500 meters from the riverbank (river border) along Besuk Kobokan because it has the potential to be affected by the expansion of hot clouds and lava flows up to a distance of 17 km from the summit. "People on the slopes of Semeru are also advised not to move within a 5 km radius of the crater/peak of Mount Semeru because they are prone to the danger of throwing stones (pijar)," he said. In addition, he continued, the public is also advised to be aware of the potential for Hot Clouds to Fall (APG), lava avalanches, and lahars along rivers/valleys that originate at the peak of the Semeru Volcano. "Especially as long as Besuk Kobokan, Besuk Bang, Besuk Kembar, and Besuk Sat and the potential for lahars in small rivers which are tributaries of Besuk Kobokan," he said.