JABAR EKSPRES – Mount Semeru, which has an altitude of 3,676 meters above sea level (mdpl), experiences eruption or eruption earthquakes every day in line with its status at level III or alert.
Yadi Yuliandi, Mount Semeru Observation Post Officer at Mount Sawur, in his written report said the highest mountain in Java Island experienced five eruption earthquakes in the period Sunday at 00.00-06.00 WIB.
“Five eruption earthquakes with an amplitude of 10-20 mm with an earthquake duration of 52-101 seconds,” he said in Lumajang district, East Java.
As for the next six-hour observation period at 06.00-12.00 WIB, seven eruption earthquakes were recorded with an amplitude of 14-22 mm and an earthquake duration of 67-96 seconds.
In addition to the eruption earthquake, the mountain, which is located on the border of Lumajang and Malang regencies, also experienced a cluster earthquake, volcanic earthquake, and local tectonic earthquake.
Mount Semeru is still on alert status or level III, so BPBD Lumajang urges the public to comply with the recommendations set by the Center for Volcanology and Geological Hazard Mitigation (PVMBG).
The public is prohibited from carrying out any activities in the southeast sector along Besuk Kobokan as far as 13 km from the peak (eruption center) and beyond this distance, the public should also not carry out activities within 500 meters of the riverbank (river border) along Besuk Kobokan, because it has the potential to be hit by the expansion of hot clouds and lava flows up to 17 km from the peak.
People on the slopes of Semeru are also advised not to do activities within a radius of 5 km from the crater/peak of Semeru Volcano because it is prone to the danger of rock throwing (incandescent).
In addition, the public is also advised to be aware of the potential for Hot Cloud Flows (APG), lava flows, and lava along the rivers/valleys that have their headwaters at the summit of Semeru Volcano, especially along Besuk Kobokan, Besuk Bang, Besuk Kembar, and Besuk Sat and the potential for lava in small rivers that are tributaries of Besuk Kobokan.
