Report on Sorikmarapi (Indonesia) — June 1986
Scientific Event Alert Network Bulletin, vol. 11, no. 6 (June 1986)
Managing Editor: Lindsay McClelland.
Sorikmarapi (Indonesia) Dark ash plume
Please cite this report as:
Global Volcanism Program, 1986. Report on Sorikmarapi (Indonesia). In: McClelland, L. (ed.), Scientific Event Alert Network Bulletin, 11:6. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198606-261120.
0.686°N, 99.539°E; summit elev. 2145 m
All times are local (unless otherwise noted)
. . . on 5 July at 1520, a large dark ash plume was observed from Sibangor Tonga observation post. No additional explosions were recorded on 5 or 6 July.
Geologic Background. Sorikmarapi is a forested stratovolcano with a 600-m-wide summit crater containing a lake and substantial sulfur deposits. A smaller parasitic crater (Danau Merah) on the upper SE flank also contains a crater lake; these two craters and a series of smaller explosion pits occur along a NW-SE line. Several solfatara fields are located on the E flank. Phreatic eruptions have occurred from summit and flank vents during the 19th and 20th centuries.
Information Contacts: L. Pardyanto, Olas, Kaswanda, A. Sudradjat, and T. Casadevall, VSI.