Logo link to homepage

Report on Tandikat-Singgalang (Indonesia) — August 2003


Bulletin of the Global Volcanism Network, vol. 28, no. 8 (August 2003)
Managing Editor: Edward Venzke.

Tandikat-Singgalang (Indonesia) Increased seismicity during January 2003

Please cite this report as:

Global Volcanism Program, 2003. Report on Tandikat-Singgalang (Indonesia) (Venzke, E., ed.). Bulletin of the Global Volcanism Network, 28:8. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN200308-261150



0.39°S, 100.331°E; summit elev. 2854 m

All times are local (unless otherwise noted)

Seismic activity at Tandikat increased significantly over the week of 20-26 January 2003. One felt earthquake (III on the MMI scale) on 20 January was followed by a significant number of deep volcanic earthquakes. The number of both volcanic and tectonic earthquakes resulted in the volcano's hazard status being upgraded to Alert Level 2 on 25 January. Seismic activity decreased over the period 27 January-16 February (table 1), but remained at an elevated level.

Table 1. Seismicity recorded at Tandikat, 13 January-16 February 2003. Data courtesy of VSI.

Date Shallow Volcanic Deep Volcanic Emission Tremor Tectonic
13 Jan-19 Jan 2002 -- 6 -- -- 22
20 Jan-26 Jan 2002 1 149 -- 2 174
27 Jan-02 Feb 2002 -- 46 4 1 54
03 Feb-09 Feb 2002 -- 24 3 -- 18
10 Feb-16 Feb 2002 -- 19 5 -- 15

Geological Summary. 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/).