Bali Volcano News – 5.1.2018

Bali Volcano News

Safe Mountain Mount Radius Lowered from 8-10 km to 6 km
The Center for Volcanology and Geological Hazard Mitigation (PVMBG), Geological Agency of the Ministry of Energy and Mineral Resources (ESDM) establishes the status of Gunung Agung, Karang Asem, Bali is still “CAUTION”, however PVMBG lowers the safe radius for activity from 6 kilometers from previously 8 to 10 kilometers. Gunung Agung is currently in a phase of eruption with relatively high volcanic activity and fluctuations.
Based on the analysis of visual and instrumental data (seismic, deformation and geochemistry), Gunung Agung is still in the eruption phase, volcanic activity is still relatively high and fluctuating. Material eruption of lava that fills the crater, blow / ash eruption, and burst rocks around the crater.
The volume of lava inside the crater is about 20 million cubic meters or about 1/3 of the crater volume (60 million cubic meters). The current dome growth rate is low so to meet the volume of the crater in a short time is likely small.
Bali Volcano News. The status of Gunung Agung seismicity until yesterday, Wednesday (3/1) at 18:00 WITA shows the amount of seismicity with high and low frequency contents to date still being recorded indicating the existence of pressure and magma flow from depth to the surface. However, current earthquake energy has not shown a significant upward trend.
Deformation data in recent days also showed a stagnant trend indicating no significant increase in pressure sources. Recent geochemical data indicate the presence of SO2 magmatic gas with a flux of about 100-300 tons / day.
Estimates The current potential hazard is the incandescent rock, sand, gravel, and heavy ash as well as the rain lava. The dangers of stones, sand, gravel, and dense ash are estimated to strike an area within a radius of 6 km from the crater.
While the danger of rain lava will follow the valley of the river which originated from Gunung Agung depending on the flow of water and the volume of eruption material.
With the scale of eruption at this time (intermittent), then the potential danger of Heat Cloud possibility is still relatively small because in addition to lava growth that slows to meet the contents of the crater, also another possibility is to break the lava dome into a hot cloud it is necessary development of considerable pressure, while the development of pressure to date has not shown a significant improvement pattern.

Bali Volcano News – Recommendation:
1. CAUTION status with radius of previous hazard area 8 km from Crater and sectoral expansion 10 Km to 6 Km from peak. Status BEWARE is still maintained, given the current Mount Agung is still in the phase of eruption and impact on the settlement.
2. The condition of Mount Agung is very dynamic then in relation to the status is still CAUTION then each party is encouraged to keep the preparedness so that in case of rapid changes can be anticipated quickly.

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