JAKARTA - Mount Semeru, which is on the border of Lumajang and Malang Regencies, East Java, again erupted with an eruption height of 600 meters above the peak on Sunday, July 6 morning.
"There was an eruption of Mount Semeru at 05.42 WIB with an eruption column height of about 600 meters above the peak or 4,276 meters above sea level (masl)," said Mount Semeru Observation Post Officer, Liswanto in a written report, quoted by Antara.
According to him, the ash column was observed to be white to gray with moderate intensity to the southwest. When the report was made, the eruption was still ongoing.
The mountain, which has an altitude of 3,676 meters above, previously erupted at 01.11 WIB and the eruption visual was not observed, but when the report was made, the eruption was still ongoing.
The seismic activity of Mount Semeru on Saturday, July 5, was recorded as many as 35 eruption/eruption earthquakes with an amplitude of 11-23 mm, then 6 gusts with an amplitude of 6-8 mm and an earthquake of 38-52 seconds.
The highest mountain on the island of Java was recorded to experience 2 harmonics with an amplitude of 4-6 mm and 7 distant tectonic earthquakes with an amplitude of 11-30 mm.
Liswanto explained that Mount Semeru is still on alert status, so the Center for Volcanology and Geological Hazard Mitigation (PVMBG) provides a number of recommendations, namely that people are prohibited from carrying out any activity in the southeast sector along Besuk Kobokan as far as 8 kilometers from the summit (the center of the eruption).
Beyond that distance, he said, people should not 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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The public is also advised not to move within a three-kilometer radius of the crater/peak of Mount Semeru because it is prone to the dangers of incandescent stones.
He further said that the public needs to be aware of the potential for hot clouds, lava avalanches, and rain lava along rivers/valleys whose water flows originate at the top of Mount Semeru, especially along Besuk Kobokan, Besuk Bang, Besuk Kembar, and Besuk Sat, as well as the potential for lava in small rivers which are tributaries of Besuk Kobokan.
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