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Semeru Erupted, Accompanied By An Explosion Reaching A Height Of 900 Meters Above Its Summit
Wednesday, 25 Dec 2024
Mount Semeru, located on the border of Lumajang and Malang regencies in East Java, has erupted again, producing an explosion that reached a height of 900 meters above its summit early Tuesday morning.
"An eruption of Mount Semeru occurred on Tuesday, December 24, 2024, at 00:09 WIB. The height of the eruption column was observed to be approximately 900 meters above the summit, or 4,576 meters above sea level," stated Sigit Rian Alfian, an officer from the Mount Semeru Observation Post, in a written report from Lumajang.
He noted that the ash column was gray in color with a thick intensity directed towards the northwest. The eruption was recorded on a seismograph with a maximum amplitude of 22 mm and lasted for 150 seconds.
According to seismic activity reports over the 24 hours leading up to Monday (December 23), Mount Semeru exhibited a predominance of eruption-related tremors, totaling 55 occurrences with amplitudes ranging from 11 to 22 mm and durations of 64 to 160 seconds.
Additionally, there was one landslide recorded with an amplitude of 4 mm and a duration of 125 seconds, along with nine puffing tremors with amplitudes between 2 and 9 mm, lasting 40 to 82 seconds.
The highest volcano on the island of Java also experienced three harmonic tremors with amplitudes of 5 to 12 mm, one local tectonic tremor with an amplitude of 20 mm, and six distant tectonic tremors with amplitudes ranging from 6 to 36 mm.
Sigit explained that Mount Semeru remains on alert status, prompting the Center for Volcanology and Geological Hazard Mitigation (PVMBG) to issue several recommendations. The public is prohibited from engaging in any activities in the southeastern sector along Besuk Kobokan within an eight-kilometer radius from the summit (the eruption center).
Beyond this distance, individuals are also restricted from activities within 500 meters of the riverbank along Besuk Kobokan, due to the potential risk of hot cloud expansion and lahar flows extending up to 13 kilometers from the summit.
"The public should refrain from any activities within a 3-kilometer radius of the crater/summit of Mount Semeru, as there is a risk of being struck by volcanic projectiles," he added.
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