JAKARTA - Mount Semeru launched a hot cloud of ash as far as 5 kilometers from the peak on Wednesday afternoon, so that the public was asked to increase their readiness.
"There was 1 time of a hot cloud fall earthquake with an amplitude of 20 millimeters and a long earthquake of 3,000 seconds," said Mount Semeru Observation Post Officer, Mukdas Sofian, as reported by ANTARA, Wednesday, January 14.
Mount Semeru's activity in the earthquake observation from 06.00-12.00 WIB also recorded 33 times of eruption/erupting earthquakes with an amplitude of 15-22 mm and a long earthquake of 62-130 seconds.
"Mount Semeru also experienced one eruption earthquake with an amplitude of 8 mm and two distant tectonic earthquakes with an amplitude of 10-25 mm," he said.
He explained that the highest mountain on Java is still in the standby status or level III, so the recommendation of the Center for Volcanology and Geological Hazard Mitigation (PVMBG) is that the public does not carry out any activities in the southeast sector along Besuk Kobokan, as far as 13 km from the peak (center of the eruption).
"Outside this distance, the public does not carry out activities at a distance of 500 meters from the river bank (river border) along Besuk Kobokan because they have the potential to be hit by the expansion of the hot cloud and lava flow up to a distance of 17 km from the peak," he said.
The public is also prohibited from carrying out activities within a radius of 5 km from the crater/peak of Mount Semeru because they are prone to the danger of stone throwing (pijar).
It is also necessary to be aware of the potential for hot clouds, lava ejection, and lahar along the river/valley flow upstream of the summit of Mount Semeru, especially along Besuk Kobokan, Besuk Bang, Besuk Kembar, and Besuk Sat, as well as the potential for lahar in small rivers which are tributaries of Besuk Kobokan.
Meanwhile, the Head of the Lumajang Regional Disaster Management Agency (BPBD), Isnugroho, urged the public to remain vigilant against the potential increase in Mount Semeru's activity while its status is still on alert.
"The hot cloud discharge occurred at 11.25 WIB with a maximum amplitude of 20 mm and thank God the hot cloud tremor has stopped at 12.15 WIB," he said.
BPBD Lumajang continues to monitor the activity of Mount Semeru through coordination with the Mount Semeru Observation Post Officer who is located in Sumberwuluh Village, Candipuro District.
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