JAKARTA - Mount Semeru, which has a height of 3,676 meters above sea level (masl), has experienced three eruptions with an altitude of 700 meters to 900 meters above the peak on Saturday morning.
The first eruption occurred at 03.59 WIB with an eruptive column height of about 800 meters above the peak and a column of ash was observed gray with moderate to thick intensity to the southwest and west. The eruption was recorded on a seismograph with a maximum amplitude of 22 mm and a duration of 150 seconds.
At 05.27 WIB, the mountain on the border of Lumajang and Malang Regencies, East Java, was again erupted with an eruption column height of approximately 900 meters above the peak.
The ash column is observed to be gray with moderate to thick intensity to the west. The eruption was also recorded on a seismograph with a maximum amplitude of 22 mm and a duration of 165 seconds.
"There was another eruption of Mount Semeru at 07.02 WIB with an eruption column height of 700 meters above the peak or 4,376 meters above the peak," said Mount Semeru Observation Post Officer Mukdas Sofian in a written report reported by ANTARA, SATURDAY, May 3.
According to him, the ash column was observed to be white to gray with thick intensity to the southeast and south. The eruption was recorded on the seismograph with a maximum amplitude of 22 mm and a duration of 150 seconds.
The Center for Volcanology and Geological Hazard Mitigation (PVMBG) provides a number of recommendations related to the status of Mount Semeru which is still Alert or Level II, namely that people are prohibited from carrying out any activities in the southeast sector along Besuk Kobokan as far as eight kilometers from the summit (the center of the eruption).
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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.
"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.
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