LUMAJANG - Mount Semeru, which is on the border of Lumajang and Malang Regencies, East Java, erupted again with an eruption height of 1,000 meters above the peak on Monday, April 13.
"Mount Semeru erupted at 09.23 WIB with an observed eruption column height of about 1,000 meters above the peak or 4,676 meters above sea level (msl)," said Mount Semeru Observation Post Officer Sigit Rian Alfian, quoted by Antara, Monday morning.
According to him, the observed ash column was white to gray with a thick intensity towards the west and northwest. The eruption was recorded on the seismograph with a maximum amplitude of 22 mm and a duration of 113 seconds.
The highest mountain on Java Island has been recorded to have erupted six times with the first eruption occurring at 05.45 WIB with a height of the eruption column of 500 meters above the peak, then at 07.36 WIB with an observed eruption column height of about 800 meters above the peak.
Then at 07.52 WIB with the height of the eruption column observed about 1 kilometer (km) above the peak, at 08:17 WIB with the height of the eruption column observed about 900 meters above the peak, at 08.53 WIB with the height of the ash column observed about 1 km above the peak, and the sixth eruption occurred at 09.23 WIB.
He explained that Mount Semeru was in the Level III (Alert) volcanic activity status, so the Center for Volcanology and Geological Hazard Mitigation (PVMBG) provided a number of recommendations, namely that the public should not carry out any activities in the southeast sector along Besuk Kobokan, as far as 13 kilometers from the peak (center of the eruption).
Outside this distance, he said, people should not carry out activities at a distance of 500 meters from the river bank (river border) along Besuk Kobokan because they have the potential to be hit by the expansion of the hot cloud and lava flow up to a distance of 17 km from the peak.
"The public is prohibited from carrying out activities within a radius of 5 km from the crater/peak of Mount Semeru because they are prone to the danger of stone throwing (pijar)," said Sigit Rian Alfian.
He also appealed to the public to be aware of the potential for hot clouds, lava discharge, and lahar along the river/valley flows upstream of the Semeru Volcano peak, especially along Besuk Kobokan, Besuk Bang, Besuk Kembar, and Besuk Sat, as well as the potential for lahar in small rivers which are tributaries of Besuk Kobokan.
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