SEMARAPURA – Mount Agung declared eruption on Tuesday (21/11/2017) afternoon at around 17:15 pm.
This condition makes residents flocked to the Post Monitor Mount Api Agung in the Village / District Rendang, Karangasem, Bali.
Many residents wondered, related to the eruption of Mount Agung which produces a dark cloud of smoke as thick as 700 meters.
Head of Post Monitor Mount Api Agung in Village / District Rendang, Karangasem, Dewa Mertayasa asserted, the eruption that occurred against Mount Agung is a phreatic eruption.
The eruption is sourced from the water of the crater, the impact of the rise of magma observed since 22 October.
The heat of the rock plus the high rainfall around the crater, triggering dense smoke containing dust that comes from material around the crater.
“The eruption of Mount Agung was a phreatic eruption, whereas seismicity has not indicated the occurrence of magmatic eruption,” explained Dewa Mertayasa.
Nevertheless, Dewa Mertayasa asks the people especially on the eastern and southeastern slopes of Mount Agung to remain vigilant.
Given the wind direction brought dust particles of Mount Agung eruption towards East and southeast of Mount Agung.
“This kind of eruption in the future is likely to happen frequently, it is still external, not directly from magmatic activity, but people on the eastern and southeastern slopes of Mount Agung to remain alert, because the dust is flying in that direction,” explained Dewa Mertayasa.
Although it has been declared erupted, PVMBG has not planned to increase the status of volcanic activity of the great mountains.
It still has to wait for other data such as seismicity, and mountain deformation.
Based on the latest evaluation, PVMBG still analyzes volcanic activity Gunung Agung is still in Standby Status (level 3).
Of volcanic activity has not indicated a spike in seismic rise.
Non-Harmonic Tremor 1, times with amplitude 2 mm and 36 second duration.
Volcanic earthquake in as much as 2 times with amplitude 5-6 mm and duration 8-26 sec.
Meanwhile, phreatic eruption of Mount Agung is making people around to panic.
People from wikayah Besakih village and surrounding areas flock to return to evacuate.
“Last morning I went home, but this afternoon the people saw the dense smoke, panicked residents and returned to the refugees,” said the villagers Besakih, Gusti Ngurah Darmayasa when met at the Observation Post Mount Api Agung Village / District Rendang.
He recounted, some Besakih people panicked when Mount Agung issued a dark clouded smoke.
Nevertheless, no residents felt any meaningful vibrations before the eruption.
“There was no earthquake that we felt, suddenly there was a dense smoke, and because of panic, our family chose to return to the village of Rendang,” said Dharmayasa. (*)