Report on Tandikat-Singgalang (Indonesia) — September 2003
Bulletin of the Global Volcanism Network, vol. 28, no. 9 (September 2003)
Managing Editor: Edward Venzke.
Tandikat-Singgalang (Indonesia) Brief episode of increased seismicity during January-February 2002
Please cite this report as:
Global Volcanism Program, 2003. Report on Tandikat-Singgalang (Indonesia) (Venzke, E., ed.). Bulletin of the Global Volcanism Network, 28:9. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN200309-261150.
0.39°S, 100.331°E; summit elev. 2854 m
All times are local (unless otherwise noted)
Volcanic seismicity at Tandikat increased significantly following a felt event (MM III) on 20 January 2002 (table 1). Deep-volcanic earthquakes totaled 149 during the week of 20-26 January, a period when 174 tectonic events were also recorded. Both types of earthquakes decreased significantly the next week, and gradually declined further over the following two weeks. The weekly report for 27 January-2 February noted that visual observations were not possible due to thick fog. The hazard status was set at Alert Level 2 (on a scale of 1-4) on 25 January 2002 and remained at that level through 16 February.
Geologic Background. Tandikat and its twin volcano to the NNE, Singgalang, lie across the Bukittinggi plain from Marapi volcano. Volcanic activity has migrated to the SSW from the higher Singgalang, and only Tandikat has had historical activity. The summit of Tandikat has a partially eroded 1.2-km-wide crater containing a large central cone capped by a 360-m-wide crater with a small crater lake. The only three reported historical eruptions, in the late 19th and early 20th centuries, produced only mild explosive activity.
Information Contacts: Dali Ahmad, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (URL: http://www.vsi.esdm.go.id/).