Disasterchannel.co,- Weekends are such a fun time, especially for those who spend time with friends. Not infrequently mountains become tourist destinations. But not for Mount Semeru today.
Exactly at 15.20 WIB, Mount Semeru experienced an increase in volcanic activity. Reporting from a BNPB press release, the chronology of events observed from the Mount Semeru Volcano Observation Post (PPGA) at Gunung Sawur Post, Poncosumo Hamlet, Sumberwuluh Village, Candipuro District, vibrations from lava floods or hot cloud avalanches were recorded starting at 14.47 WIB with a maximum amplitude of 20 millimeter.
At 15.10 WIB, PPGA Pos Gunung Sawur then reported visually that volcanic ash from hot cloud avalanches was very clearly observed towards Besuk Kobokan and smelled of sulfur. In addition, visual reports from several locations also experienced darkness due to fog from volcanic ash.
According to records compiled by the Center for Volcanology and Geological Hazard Mitigation (PVMBG), incandescent lava avalanches were observed with a sliding distance of approximately 500-800 meters with the center of the avalanche located approximately 500 meters below the crater.
Through the kompas.com page, the Head of the Center for Volcanology and Geological Hazard Mitigation (PVMBG) Andiani. Saying “The Semeru eruption in the form of hot clouds avalanches, on December 4, 2021 at 13:30 WIB, starting with a lahar incident. It is recorded on the seismogram that the maximum amplitude of 25 mm is still ongoing,” said Andiani, when confirmed by Kompas.com, Saturday (12/4). /2021). He explained, the hot cloud avalanches leading to the Besuk Kobokan area. It is currently still monitoring the situation on the ground. PVMBG is also in the process of checking the hot cloud glide distance.
The PVMBG page describes Mount Semeru whose activities are located in Jonggring Seloko Crater which is located southeast of Mahameru peak. The eruptions of Mount Semeru are generally volcanic and strombolian ash eruptions that occur 3-4 times every hour. Volcanian-type eruptions are characterized by explosive eruptions that sometimes destroy pre-formed lava domes and tongues. Then there was a strombolian-type eruption which was usually followed by the formation of a new dome and lava tongue. When an explosive eruption occurs, it is usually followed by a flow of hot clouds flowing into the lower valleys and the direction of the flow is in accordance with the openings of the craters and valleys on Mount Semeru. The direction of the opening of the crater of Mount Semeru is currently towards the southeast or towards the upstream of Besuk Kembar, Besuk Bang, Besuk Kobokan.
Up to now, the monitoring system for the activities of Mount Semeru has been carried out visually, deformation and seismicity from the Mount Semeru Observation Post on Mount Sawur, while the observation post at Argosuko is a support post (visual observations only).
Monitoring of Mount Semeru was carried out in collaboration with Japan (Sakurajima Volcano Observatory, Disaster Prevention Research Institute, Kyoto University).
Efforts to respond to this incident have been carried out by the Regional Disaster Management Agency (BPBD) of Lumajang Regency and have issued an appeal to the community and miners not to engage in activities along the Mujur and Kobokan Watersheds.
Members of the Lumajang Regency BPBD along with other joint teams immediately headed to the location of the incident in the Candipuro-Pronojiwo sector to carry out monitoring, rapid assessment, data collection, evacuation and other actions deemed necessary in handling emergencies.
The Lumajang Regency BPBD team is currently trying to establish a sectoral evacuation point in Kamarkajang Field, Sumberwuluh Village, Candipuro District, Lumajang Regency.
From the visual appearance of Mount Semeru still covered in fog accompanied by rain with moderate intensity. Meanwhile, material losses and other impacts from the eruption of Mount Semeru are still being recorded. (LS)
Source:
https://www.kompas.com/tren/read/2021/12/04/165506865/gunung-semeru-erupsi-ini-penjelasan-pvmbg.
SIARAN PERS BNPB 4 Desember 2021 1.185/Pers-PusdatinKK/BNPB/Dis.02.01/XII/2021
https://vsi.esdm.go.id/index.php/gunungapi/data-dasar-gunungapi/533-g-semeru?start=1
Photo: kabar24.bisnis.com
