Report on Slamet (Indonesia) — 5 March-11 March 2014
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 5 March-11 March 2014
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2014. Report on Slamet (Indonesia). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 5 March-11 March 2014. Smithsonian Institution and US Geological Survey.
7.242°S, 109.208°E; summit elev. 3428 m
All times are local (unless otherwise noted)
PVMBG reported that seismicity at Slamet increased during 1-10 March, particularly during 8-10 March. Observers at a post in Slamet Gambuhan village, about 10 km away, noted that diffuse to dense white plumes rose as high as 600 m above the crater during 1-7 March, and as high as 1 km during 8-10 March. The Alert Level was raised to 2 (on a scale of 1-4) on 10 March; visitors and tourists were advised not to approach the crater within a radius of 2 km.
Geologic Background. Slamet, Java's second highest volcano at 3428 m and one of its most active, has a cluster of about three dozen cinder cones on its lower SE-NE flanks and a single cinder cone on the western flank. It is composed of two overlapping edifices, an older basaltic-andesite to andesitic volcano on the west and a younger basaltic to basaltic-andesite one on the east. Gunung Malang II cinder cone on the upper E flank on the younger edifice fed a lava flow that extends 6 km E. Four craters occur at the summit of Gunung Slamet, with activity migrating to the SW over time. Historical eruptions, recorded since the 18th century, have originated from a 150-m-deep, 450-m-wide, steep-walled crater at the western part of the summit and have consisted of explosive eruptions generally lasting a few days to a few weeks.