Based on satellite observations and information from PVMBG, the Darwin VAAC reported that on 31 October an ash plume from Rinjani rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted W before it detached. During 1-3 November ash plumes rose to altitudes of 2.7-4.3 km (9,000-14,000 ft) a.s.l. and drifted as far as 350 km NW, W, WSW, and SW.
BNPB reported that on 3 November ash plumes rose as high as 1 km above Barujari Crater and drifted W; ashfall was reported in seven villages in North Lombok. According to a November news article, ash plumes that drifted W and SW caused three airports to close during 3-4 November: Ngurah Rai (150 km WSW) in Bali, Selaparang Airport (40 km WSW) in Lombok, and Blimbingsari Airport (230 km W) in Banyuwangi, East Java. On 4 November BNPB reported that ash plumes rose to an altitude of 4.3 km (14,000 ft) a.s.l. and drifted W and SW.
The eruption has intensified a lot over the past few days. Activity takes place from a lateral vent on the Barujari cone inside the volcano’s caldera, producing continuous ash emissions and feeding a new viscous lava flow. The lava flow has been advancing more than 500 m in two lobes towards the NE.
This current more intense phase of the eruption seems ot have started in the early afternoon of 2 Nov, when ash emissions became large enough to produce a plume that drifted westwards and reached Bali, where the airport of Denpasar was shut down. The plume was almost 400 km long this morning and the shut-down of the airport has been causing significant flight disruptions. When it can be reopened will depend on whether ash emissions continue and the prevailing wind direction in the coming days.
On Lombok island itself, the rumblings from the eruptions are heard in many areas. Access to the summit area of Rinjani has been closed and a 3 km exclusion zone around the caldera rim is in place. Several villages on Lombok reported ash falls.
November 05, 2015. Rinjani, Indonesie :
8,42 ° S, 116,47 ° E
Elevation 3726 m
Sources: Volcanic Ash Advisory Centre Darwin (VAAC), Badan Nacional Penanggulangan Bencana (BNPB), the Jakarta Post , Volcanodiscovery
Photo : L.K.Adam / Twitter