JAKARTA - Mount Semeru on the border of Lumajang and Malang Regencies, East Java, experienced eight eruptions with an eruption height of up to 900 meters above the peak on Sunday.
The first eruption occurred at 05.50 WIB with the height of the observed eruption column about 600 meters above the peak and the ash column was observed to be white to gray with medium intensity towards the southeast.
Eruptions occurred consecutively at 06.23 WIB, 09.24 WIB, 12.55 WIB, 15.51 WIB, 16.39 WIB, 18.29 WIB and the eighth eruption occurred at 19.00 WIB.
"The eruption of Mount Semeru at 19.00 WIB with the height of the eruption column observed at around 900 meters above the peak or 4,576 meters above sea level," said Mount Semeru Observation Post Officer, Liswanto in a written report received in Lumajang.
According to him, the column of ash observed was white to gray with medium intensity towards the north. When the report was made, the eruption was still ongoing.
He explained that currently the volcanic activity of Mount Semeru is at Level III Status (Alert) with the recommendation that the public not carry out any activities in the southeast sector along Besuk Kobokan as far as 13 kilometers from the peak (eruption center).
Outside this distance, the public does 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 kilometers from the peak.
"The public is prohibited from carrying out activities within a radius of five kilometers from the crater/peak of Mount Semeru because they are prone to the danger of stone throwing (pijar)," he said.
He asked the public to be aware of the potential for hot clouds, lava discharge, and lahar along the river/valley streams upstream of the summit of Mount Semeru.
"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," said Liswanto.
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