Report on Talang (Indonesia) — February 2002
Bulletin of the Global Volcanism Network, vol. 27, no. 2 (February 2002)
Managing Editor: Richard Wunderman.
Talang (Indonesia) Small explosion earthquakes, plumes 400 m above summit during late 2001-early 2002
Please cite this report as:
Global Volcanism Program, 2002. Report on Talang (Indonesia) (Wunderman, R., ed.). Bulletin of the Global Volcanism Network, 27:2. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN200202-261160
Talang
Indonesia
0.979°S, 100.681°E; summit elev. 2575 m
All times are local (unless otherwise noted)
From late October 2001 through at least 10 March 2002 at Talang, seismicity was often dominated by small explosion earthquakes (table 2). Plumes reached up to 400 m above the summit, and the temperature at Batu Bajangjang hot spring, located ~5 km N of the summit, was reported at 43-71°C (table 3). The Alert Level remained at 2 through at least 10 March 2002.
Table 2. Earthquakes, tremor, and other seismic signals at Talang during 8 October 2001 through 10 March 2002. The seismograph was broken during 30 December through 20 January, so seismic information was not reported for that period. Courtesy VSI.
| Date | Deep volcanic (A-type) | Shallow volcanic (B-type) | Tectonic | Small explosion | Tremor |
| 08 Oct-14 Oct 2001 | 11 | -- | 17 | -- | -- |
| 15 Oct-21 Oct 2001 | 15 | 1 | 1 | -- | -- |
| 22 Oct-28 Oct 2001 | 18 | 4 | 35 | continuous | -- |
| 29 Oct-04 Nov 2001 | 14 | -- | 19 | continuous | -- |
| 05 Nov-11 Nov 2001 | 14 | 5 | 14 | 124 | 29 |
| 12 Nov-18 Nov 2001 | 8 | -- | 9 | continuous | 22 |
| 19 Nov-25 Nov 2001 | 10 | -- | 16 | 233 | 3 |
| 26 Nov-02 Dec 2001 | 14 | -- | 17 | 350 | 4 |
| 03 Dec-09 Dec 2001 | 11 | 1 | 31 | 455 | 2 |
| 17 Dec-30 Dec 2001 | 33 | 3 | 55 | -- | -- |
| 04 Feb-10 Feb 2002 | 9 | -- | 6 | 247 | 40 |
| 11 Feb-17 Feb 2002 | -- | -- | 2 | 265 | -- |
| 18 Feb-24 Feb 2002 | -- | -- | 1 | 154 | -- |
| 25 Feb-03 Mar 2002 | 3 | -- | 12 | 156 | -- |
| 03 Mar-10 Mar 2002 | 3 | 3 | 8 | 75 | -- |
Table 3. Plume details at Talang and reported temperatures at Batu Bajangjang hot spring during 8 October 2001 through 10 March 2002. Courtesy VSI.
| Date | Plume details (heights are above the summit) | Temperature at Batu Bajangjang hot spring |
| 08 Oct-14 Oct 2001 | White-thin, low-pressure plume to ~ 50-100 m. | 45-68°C |
| 15 Oct-28 Oct 2001 | White-thin, low pressure plume to ~ 50-100 m; on 15 Oct a white-brown high-pressure plume from Kepundan Panjang and Gabuo Atas solfatara/fumarole fields rose 150-200 m; on 22 October a white-thick brown plume rose 250 m from upper Kepundan Kabuo; on 24 October a brownish-gray, high-pressure plume reached 400 m. | -- |
| 29 Oct-04 Nov 2001 | White-gray thin plume from Gabuo Atas solfatara/fumarole field and from Kepundan Panjang rose 150 m. | 47-71°C |
| 05 Nov-11 Nov 2001 | White-thick plume from Gabuo Atas and Kepundan Panjang solfatara/fumarole field rose ~250-300 m and drifted S; at 2240 m elevation between Gabuo Atas and Sapan hot spring (NE of Kepundan Panjang) a whitish-brown thin medium-pressure plume rose ~200 m. | -- |
| 12 Nov-18 Nov 2001 | White-thick brownish plume from Gabuo Atas and Kepundan Panjang solfatara/fumarole fields reached 50 m and drifted S. | -- |
| 19 Nov-02 Dec 2001 | White-thin plume from Gabuo Atas and Kepundan Panjang solfatara/fumarole fields reached 50 m and drifted E. | -- |
| 03 Dec-09 Dec 2001 | White-thin plume from Gabuo Atas and Kepundan Panjang solfatara/fumarole fields rose ~50-150 m and drifted E. | 43°C |
| 17 Dec-30 Dec 2001 | White-thin, low-pressure plume rose ~50 m and drifted E. | -- |
| 30 Dec-20 Jan 2002 | White-thin plume rose 50-100 m. | 43-64°C |
| 04 Feb-10 Mar 2002 | White-thin plume rose 100-150 m. | -- |
Geological Summary. Talang, which forms a twin volcano with the extinct Pasar Arbaa volcano, lies ESE of the major city of Padang and rises NW of Dibawah Lake. Talang has two crater lakes on its flanks; the largest of these is 1 x 2 km wide Danau Talang. The summit exhibits fumarolic activity, but which lacks a crater. Historical eruptions have mostly involved small-to-moderate explosive activity first documented in the 19th century that originated from a series of small craters in a valley on the upper NE flank.
Information Contacts: Dali Ahmad, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (URL: http://www.vsi.esdm.go.id/).
