The first eruption was recorded at 12.11 a.m. local time, producing a white ash column that rose 400 meters above the summit, or 4,076 meters above sea level.
"The ash column was observed to be white to gray with moderate intensity, heading southwest," Mount Semeru observation officer, Liswanto, confirmed in a written report.
The second eruption was recorded at 05.17 a.m. local time, sending an ash column around 900 meters high above the summit, or 4,576 meters above sea level.
"The ash column was observed to be white to gray with moderate intensity, heading south," he said.
The volcano erupted again at 06.00 a.m. with a white to gray ash column reaching 700 meters above the summit. The column was observed heading south with moderate intensity.
Meanwhile, the fourth eruption occurred at 08.04 a.m. with the observed ash column reaching a height of about 500 meters above the summit.
The ash column was observed to be white to gray in color and thick, moving to the south and southwest. The eruption was recorded on a seismograph with a maximum amplitude of 22 mm and a duration of 128 seconds.
Liswanto informed that Mount Semeru’s status remains unchanged at Level II or alert.
The Center for Volcanology and Geological Hazard Mitigation (PVMBG) has issued several recommendations for the public, including prohibiting any activity in the volcano’s southeast sector along Besuk Kobokan, up to a distance of 8 kilometers from the summit.
People have also been advised not to carry out any activities within 500 meters of the riverbank along Besuk Kobokan due to the potential for expansion of pyroclastic and lava flows, which can spread to a distance of up to 13 km from the summit.
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Translator: Zumrotun Solichah, Raka Adji
Editor: Primayanti
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