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). In: Wunderman, R (ed.), Bulletin of the Global Volcanism Network, 27:2. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN200202-261160.

Volcano Profile |  Complete Bulletin


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.

[Skip text table]
    Date            Deep volcanic   Shallow volcanic   Tectonic     Small     Tremor
                      (A-type)          (B-type)                  explosion

    08 Oct-14 Oct        11                --             17          --        --
    15 Oct-21 Oct        15                 1              1          --        --
    22 Oct-28 Oct        18                 4             35     continuous     --
    29 Oct-04 Nov        14                --             19     continuous     --
    05 Nov-11 Nov        14                 5             14         124        29
    12 Nov-18 Nov         8                --              9     continuous     22
    19 Nov-25 Nov        10                --             16         233         3
    26 Nov-02 Dec        14                --             17         350         4
    03 Dec-09 Dec        11                 1             31         455         2
    17 Dec-30 Dec        33                 3             55          --        --
    04 Feb-10 Feb         9                --              6         247        40
    11 Feb-17 Feb        --                --              2         265        --
    18 Feb-24 Feb        --                --              1         154        --
    25 Feb-03 Mar         3                --             12         156        --
    03 Mar-10 Mar         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.

[Skip text table]
    Date            Plume details                                      Temperature at
                    (heights are above the summit)                     Batu Bajangjang
                                                                       hot spring

    08 Oct-14 Oct   White-thin, low-pressure plume to ~ 50-100 m.           45-68°C

    15 Oct-28 Oct   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   White-gray thin plume from Gabuo Atas solfatara/        47-71°C
                    fumarole field and from Kepundan Panjang rose 150 m.

    05 Nov-11 Nov   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   White-thick brownish plume from Gabuo Atas and             --
                    Kepundan Panjang solfatara/fumarole fields reached
                    50 m and drifted S.

    19 Nov-02 Dec   White-thin plume from Gabuo Atas and Kepundan Panjang      --
                    solfatara/fumarole fields reached 50 m and drifted E.

    03 Dec-09 Dec   White-thin plume from Gabuo Atas and Kepundan Panjang      43°C
                    solfatara/fumarole fields rose ~50-150 m and drifted E.

    17 Dec-30 Dec   White-thin, low-pressure plume rose ~50 m and drifted E.   --

    30 Dec-20 Jan   White-thin plume rose 50-100 m.                         43-64°C

    04 Feb-10 Mar   White-thin plume rose 100-150 m.                           --

Geologic Background. 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/).