Report on Sirung (Indonesia) — 8 July-14 July 2015
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 8 July-14 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, 8 July-14 July 2015. Smithsonian Institution and US Geological Survey.
Sirung
Indonesia
8.4972°S, 124.1306°E; summit elev. 1347 m
All times are local (unless otherwise noted)
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 8 July an ash plume from Sirung drifted 55 km W at an altitude of 1.5 km (5,000 ft) a.s.l.
Geological Summary. Sirung is located at the NE end of a volcanic massif with multiple centers that extends 14 km NE from 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 occurred from vents within the caldera during the 20th century. Forested Gunung Topaki, the high point of the volcanic chain, has a small summit crater and lies ~3.5 km SW of the active crater area.
