JAKARTA - Mount Semeru 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 evening.
"Mount Semeru erupted at 19.21 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, Liswanto, as reported by ANTARA, Monday, February 2.
A glow of lava was also seen coming down from the peak of the mountain, which has a height of 3,676 meters above sea level, and a column of ash was observed in white to gray with medium intensity towards the north. At the time of the report, the eruption was still ongoing.
The highest mountain on Java Island erupted again at 20.48 WIB with an observed eruption column height of about 800 meters above the peak (4,476 m asl) and an observed ash column of white to gray with medium intensity towards the north.
"Six minutes later, Mount Semeru erupted again at 20.54 WIB with an observed eruption column height of about 500 meters above the peak (4,176 m asl)," he said.
He said the column of ash was observed to be white to gray with medium intensity towards the north and when the report was made, the eruption was still ongoing.
Mount Semeru is in Level III (Alert) volcanic activity status, so the Center for Volcanology and Geological Hazard Mitigation (PVMBG) has 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, the public 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 kilometers from the peak.
"The public is also prohibited from carrying out activities within a radius of 5 kilometers from the crater/peak of Mount Semeru, because they are prone to the danger of stone throwing (pijar)," he said.
The public needs to be aware of the potential for hot clouds, lava discharge, and lahar along the river/valley streams 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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