Semeru Erupts! Abu Capai 1.000 Meters Colon, PVMBG Issues Strict Warning
Mount Semeru, which is on the border of Lumajang and Malang regencies, East Java, erupted with an eruption as high as 1,000 meters above the peak on Tuesday, June 10 morning.
"There was an eruption of Mount Semeru on Tuesday, June 10, 2025, at 05.47 WIB with an eruption column height of about 1,000 meters above the peak or 4,676 meters above sea level," said Mount Semeru Observation Post Officer Mukdas Sofian in a written report received in Lumajang. quoted by ANTARA.
According to him, the ash column was observed to be white to gray with thick intensity to the southwest. The eruption of the highest mountain on the island of Java was recorded on a seismograph with a maximum amplitude of 22 mm and a duration of 191 seconds.
From January 1 to June 10 at 07.00 WIB, the number of eruptions of Mount Semeru was recorded at 1,799 times, so that volcanic activity was dominated by earthquake eruptions/eruptions every day.
He 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 eight kilometers from the summit (the center of the eruption).
"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," he said.
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The public is also advised not 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.
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 lahars in small rivers which are tributaries of Besuk Kobokan.