Report on Agung (Indonesia) — 15 July-21 July 2020
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 15 July-21 July 2020
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2020. Report on Agung (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 15 July-21 July 2020. 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 the last eruption at Agung was recorded at 0138 on 13 June 2019. Over the past year seismicity had generally decreased; volcanic earthquakes continued to be recorded but at a low occurrence rate. Deformation data indicated a deflationary pattern which had stabilized in recent months. A thermal anomaly was last visible in satellite data in October 2019 and did not reappear. White plumes were visible rising 20-150 m above the summit during 1 January-16 July. PVMBG lowered the Alert Level at Agung to 2 (on a scale of 1-4) on 16 July, stating that the public should not enter an exclusion zone set at a 2-km radius.
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.