PVMBG reported that during 15 November-4 December white plumes from Tengger Caldera’s Bromo cone rose as high as 150 m above the crater, and an intense sulfur dioxide odor was noted at the Bromo observation post. On 15, 23, and 27 November dense ash plumes rose 150 m above the crater rim. RSAM values increased at the beginning of November, and then sharply increased in the beginning of December. Based on seismic analysis, visual observations, and hazard potential, the Alert Level was raised to 3 (on a scale of 1-4) on 4 December. Residents and visitors were warned not to approach the crater within a radius of 2.5 km.
Based on information from PVMBG and satellite images, the Darwin VAAC reported that during 5 and 7-8 December ash plumes rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted 55-185 km W, SW, S, and SE.
December 10, 2015. Bromo, Caldeira du Tengger , Indonésie:
Elevation 2329 m
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi , Centre d’avis de cendres volcaniques de Darwin (VAAC)
Photo : Øystein Lund Andersen