NUSADAILY.COM – LUMAJANG – Head of The Gunungapi Mitigation Sub-Division of the Western Region Volcanology and Geological Disaster Mitigation Center (PVMBG) Nia Haerani said the eruption of Mount Semeru occurred not continuously and its status is still at level II or alert.
“Eruptions occur not continuously with eruption columns not observed because they are generally covered in fog over the past week,” he said when contacted from Lumajang Regency, East Java, Tuesday.
According to him, the activity of Mount Semeru during 7-13 December 2020 is still volatile, observed the smoke of the main crater is white with a thin intensity, about 100 meters high from the summit.
“Observed hot clouds of autumn with a launch distance of 1.5 to 3.5 kilometers from the summit, the direction of the slide to the southeast (Besuk Kobokan),” he said.
He explained that incandescent lava fall is observed with a glide distance of 400 to 500 meters from the summit and the direction of the southeast slide (Besuk Kobokan).
The seismograph also recorded 128 earthquakes. 2 times hot cloud earthquake fall, 92 times earthquake fall, 45 times earthquake gusts, 25 times harmonic tremor, 1 time deep volcanic earthquake, 1 local tectonic earthquake, 19 times distant tectonic earthquake, and 10 times flood tremor.
Based on the monitoring post report. Mount Semeru activity observation period Tuesday (December 15, 2020) at 00.00 – 06.00 WIB visually The mountain fog and crater smoke are not observed.
“Smoke eruptions, smoke gusts are visually un observed because the mountains are mostly covered in fog,” he said.
For earthquake activity recorded an eruption four times. Two fall, one gust, and harmonic tremor four times.
Therefore, he continued, PVMBG urges people not to do activities within a radius of 1 km from the crater / peak of G. Semeru and a distance of 4 km in the direction of crater openings in the south-southeast sector. Also be aware of the hot clouds of autumn, lava fall, and lava along the flow of rivers / valleys that precede the summit of Mount Semeru.
People are encouraged to stay away from or not to do activities in areas affected by hot cloud material. Because at the moment the temperature is still high and need to be aware of the potential for launch along the valley of the Hot Cloud Path Besuk Kobokan.
“People are asked to be alert to the threat of lava in the flow of rivers / valleys that precede Mount Semeru given the amount of volcanic material that has been formed,” he said. (eky)