Report on Agung (Indonesia) — 13 June-19 June 2018
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 13 June-19 June 2018
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2018. Report on Agung (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 13 June-19 June 2018. Smithsonian Institution and US Geological Survey.
8.343°S, 115.508°E; summit elev. 2997 m
All times are local (unless otherwise noted)
PVMBG reported that at 1105 on 13 June an event at Agung produced a dense ash plume that rose around 2 km above the crater rim and drifted SW and W. Based on analysis of the seismic data, the event lasted two minutes and 12 seconds. Another event was detected at 2115 on 15 June, though foggy conditions prevented estimations of the ash plume height; ash fell in areas W, including in Puregai (7 km W). The Alert Level remained at 3 (on a scale of 1-4) and the 4-km-radius exclusion zone was unchanged.
Geologic Background. Symmetrical Agung stratovolcano, Bali's highest and most sacred mountain, towers over the eastern end of the island. The volcano, whose name means "Paramount," rises above the SE caldera rim of neighboring Batur volcano, and the northern and southern flanks extend to the coast. The summit area extends 1.5 km E-W, with the high point on the W and a steep-walled 800-m-wide crater on the E. The Pawon cone is located low on the SE flank. Only a few eruptions dating back to the early 19th century have been recorded in historical time. The 1963-64 eruption, one of the largest in the 20th century, produced voluminous ashfall along with devastating pyroclastic flows and lahars that caused extensive damage and many fatalities.