Report on Sirung (Indonesia) — 1 July-7 July 2015
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 1 July-7 July 2015
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2015. Report on Sirung (Indonesia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 1 July-7 July 2015. Smithsonian Institution and US Geological Survey.
8.508°S, 124.13°E; summit elev. 862 m
All times are local (unless otherwise noted)
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 7 July an ash plume from Sirung rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted 85 km SW.
Geological Summary. Sirung volcano is located at the NE end of a 14-km-long line of volcanic centers that form a peninsula at the southern end of Pantar Island. The volcano is truncated by a 2-km-wide caldera whose floor often contains one or more small lakes. Much of the volcano is constructed of basaltic lava flows, and the Gunung Sirung lava dome forms the high point on the caldera's western rim. A number of phreatic eruptions have occurred from vents within the caldera during the 20th century. Forested Gunung Topaki, the high point of the volcanic chain, lies at the SW end and contains a symmetrical summit crater.