Report on Slamet (Indonesia) — March 1991
Bulletin of the Global Volcanism Network, vol. 16, no. 3 (March 1991)
Managing Editor: Lindsay McClelland.
Slamet (Indonesia) Continued gas emission
Please cite this report as:
Global Volcanism Program, 1991. Report on Slamet (Indonesia) (McClelland, L., ed.). Bulletin of the Global Volcanism Network, 16:3. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN199103-263180
7.242°S, 109.208°E; summit elev. 3428 m
All times are local (unless otherwise noted)
The crater was covered by thick solfataric gas, but no significant changes were observed during fieldwork. Earthquakes associated with gas emissions were recorded an average of 776 times/day.
Geological Summary. 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.
Information Contacts: W. Modjo, VSI; AP.