Mount Semeru, which is on the border of Lumajang and Malang regencies, East Java, erupted with an eruption as high as 500 meters above the peak on Friday night.
"There was an eruption of Mount Semeru on Friday night at 20.46 WIB with an eruptive column height of about 500 meters above the peak or 4.176 meters above sea level (masl)." said the officer of the Mount Semeru Observation Post, Mukdas Sofian, as reported by ANTARA, Friday, May 2.
According to him, the ash column was observed to be white to gray with thick intensity to the southwest. The eruption was recorded on a seismograph with a maximum amplitude of 22 mm and a duration of 158 seconds.
Based on officer data, the highest mountain on the island of Java was recorded to have experienced six eruptions this Friday from 01.30 WIB to 20.46 WIB with an eruption height of 500 meters to 1,000 meters above the peak.
The Center for Volcanology and Geological Hazard Mitigation (PVMBG) provides a number of recommendations related to the status of Mount Semeru which is still vigilant or level II, namely that people are prohibited from carrying out any activities in the southeast sector along Besuk Kobokan as far as 8 kilometers from the summit (the center of the eruption).
Then outside of that distance, people are 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 13 kilometers from the summit.
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"People are also not allowed to move within a radius of three kilometers from the crater/peak of Mount Semeru because it is prone to the dangers of incandescent stones," he said.
The public also needs to be aware of the potential for hot clouds, lava avalanches, and rain lava along rivers and valleys that originate at the peak of Mount Semeru, especially along Besuk Kobokan, Besuk Bang, Besuk Kembar, and Besuk Sat, as well as the potential for lava in small rivers that are tributaries from Besuk Kobokan.
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