Mount Semeru Erupts, Eruption Height 800 Meters

November 21, 2024 | 09:45 am

TEMPO.CO, Jakarta - Mount Semeru located on the border of Lumajang and Malang Regencies, East Java, once again erupted with an eruption height of 800 meters above the peak or 4,476 meters above sea level (masl) on Thursday morning, November 21, 2024.

"Mount Semeru erupted on Thursday, November 21, 2024 at 05:21 AM Western Indonesian Time (WIB) with an observed eruption column height of about 800 meters above the peak," said Semeru Mountain Observation Post officer, Sigit Rian Alfian in a written statement received in Lumajang on Thursday, November 21, 2024, as quoted by Antara.

Sigit stated that the observed ash column was grayish in color with a thick intensity towards the southwest direction, and the eruption was recorded on a seismograph with a maximum amplitude of 21 mm and a duration of 119 seconds.

Based on the records of Semeru Mountain Observation Post officers, the activity of the highest mountain on Java Island on Wednesday, November 20, 2024, was dominated by eruption earthquakes occurring 89 times with amplitudes of 11-22 mm and earthquake durations of 55-148 seconds.

There were also three instances of avalanche earthquakes, 10 instances of emission earthquakes, two harmonic earthquakes, one intraplate volcanic earthquake, four instances of distant tectonic earthquakes, and one instance of flood tremor earthquake with an amplitude of 17 mm and a duration of 3,828 seconds.

Sigit explained that Mount Semeru is still on alert status. The Center for Volcanology and Geological Hazard Mitigation (PVMBG) has provided several recommendations to the public not to engage in any activities in the southeast sector along the Besuk Kobokan area up to eight kilometers from the peak (eruption center).

Outside of this range, the public is not allowed to carry out activities within 500 meters from the riverbank (river boundary) along the Besuk Kobokan area due to the potential threat of pyroclastic flow expansion and lahars up to a distance of 13 kilometers from the peak. "The public is also not allowed to engage in activities within a three-kilometer radius from the crater or peak of Mount Semeru, as there is a risk of rock projectile danger," said Sigit.

Furthermore, the public needs to be aware of the potential for pyroclastic flows, lava avalanches, and lahars along the river streams or valleys originating from the peak of Mount Semeru, especially along Besuk Kobokan, Besuk Bang, Besuk Kembar, and Besuk Sat, as well as the potential for lahars in small rivers that are tributaries of Besuk Kobokan.

Editor's Choice: Mount Semeru Erupted Twice This Morning with 4-Hour Interval, Ash Column Reaches 800 Meters High

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