TEMPO.CO, Yogyakarta - Mount Merapi, located on the border of Central Java and the Special Region of Yogyakarta, had spewed a column of hot cloud measuring approximately 1,000 meters in height from the summit, on Sunday.
The Center for Investigation and Development of Geological Disaster Technology (BPPTKG) said via its official Twitter, that the hot clouds released by Mount Merapi was recorded on the seismogram at 10:46 am local time, and lasted for 155 seconds with a maximum amplitude of 70 mm.
"The eruption column was observed as high as approximately 1,000 meters. The wind blew to the west," the Center wrote on Sunday.
Based on observations, from 12 a.m. to 6 a.m. local time, the BPPTKG also recorded seven avalanches on Mount Merapi with an amplitude of 2 to 10 mm that lasted for 17.6-21.52 seconds.
There were also two hybrid earthquakes with an amplitude of 2 mm that lasted for 6.72-7.2 seconds, two shallow volcanic earthquakes with amplitudes of 44-65 mm that lasted for 11.56-16.16 seconds, and one deep volcanic earthquake with an amplitude of 3 mm for 8.88 seconds.
Mount Merapi had previously released pyroclastic flow on Saturday, November 9, with a column height of 1,500 meters. The hot clouds of the eruption had an amplitude of 65 mm and lasted for 160 seconds with an estimated sliding distance of 1,500 meters.
Up until now, the Center keeps the status of Mount Merapi at Level II or Alert (Waspada) and temporarily advises against climbing activities, except for investigations and research related to disaster mitigation.
BPPTKG also urges residents to refrain from taking on activities within a radius of three kilometers from the summit of Mount Merapi.
The community was asked not to be provoked into issues regarding the eruption of Mount Merapi without clear and credible sources. They are advised to follow the directions of local government officials or ask directly to the Mount Merapi Observation Post or BPPTKG office, which can be done through BPPTKG social media platforms.