Head of the Emergency, Rehabilitation, and Reconstruction Division of the Lumajang District Regional Disaster Mitigation Agency (BPBD) Joko Sambang stated on Wednesday that the hot cloud slide from the avalanche was recorded on the seismogram with a maximum amplitude of 25 mm.
According to the monitoring post officer's report, during the observation period from Wednesday at 00:00 to 06:00 local time, Mount Semeru had erupted 12 times.
"The height of the smoke is approximately 500 to 700 meters, and the smoke tends to blow to the southwest and southeast direction," Sambang explained.
In addition, Mount Semeru has experienced 18 earthquakes, with an amplitude of 18-25 mm for 100-250 seconds, five harmonic tremors, two volcanic earthquakes, and two distant tectonic earthquakes.
During the observation period on Wednesday at 6:00 to 12:00 local time, an eruption of gray-white smoke reaching heights of 400 to 1,800 meters was observed at the top of Mount Semeru.
During that time, Mount Semeru was also recorded to experience 19 earthquake eruptions, one gust earthquake, and one harmonic tremor, with an amplitude of 6 mm for 220 seconds.
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Sambang noted that residents were advised to not conduct activities in the southeast part along Besuk Kobokan as far as 13 kilometers from the top of the mountain and in areas within a radius of 500 meters from the riverbank along Besuk Kobokan that are potentially affected by hot clouds from avalanches and lava flows.
"People are also not allowed to move within a five-kilometer radius from the crater or the peak of Mount Semeru since it is prone to the danger of rock blast," he remarked.
Sambang appealed to residents around Mount Semeru to be aware of the impact of hot clouds of avalanches, lava avalanches, and cold lava along the river that originates at the top of the mountain, especially along Besuk Kobokan, Besuk Bang, Besuk Kembar, and Besuk Sat, as well as the impact of lava flows on the river from Besuk Kobokan.
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Translator: Zumrotun Solichah, Resinta S
Editor: Rahmad Nasution
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