Talang had an increase in seismicity during mid-2009. Minor tremor and emissions of ash and sulfur dioxide (SO₂) occurred during 2007 (BGVN 33:02). The Alert Level was lowered to 2 (on a scale of 1-4) on 14 December 2007 based on visual observations and a decrease in earthquakes.

In their report of 17 August the Center of Volcanology and Geological Hazard Mitigation (CVGHM) reported seismic activity between 1430 on 16 August through 0600 on 17 August. On 15 August there were four deep volcanic events and one low-frequency earthquake. Over the next two days they recorded 917 deep volcanic and another 30 shallow volcanic earthquakes, along with continuous tremor. Because of the significant increase in seismic activity, CVGHM increased the Alert Level from 2 to 3. It also stepped up its monitoring and assigned an emergency response team to conduct an onsite evaluation. Foggy conditions prevented visual observations. Visitors and tourists were advised not to go within 3-km of the summit.

Geological Summary. Talang is part of a large volcanic edifice just NW of Dibawah Lake. An older volcanic peak, Pasar Arbaao, is ~1.5 km W. The steep-sided Talang cone exhibits fumarolic activity but has no crater; it appears to have grown within a larger caldera. Recorded 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 NE flank.

Information Contacts: Center of Volcanology and Geological Hazard Mitigation (CVGHM), Jalan Diponegoro 57, Bandung 40122, Indonesia (URL: http://vsi.esdm.go.id/).