The West Nusa Tenggara authorities closed to the public the Rinjani National Park following an eruption of Mount Barujari to 10:45 (local time) on Sunday morning, with projections of materials up to 200 meters high. Hundreds of hikers and Hindu devotees coming to participate in a religious ceremony at the lake had to be evacuated.
The Barujari is in the same volcanic system than the the Rinjani caldera and contains a lake 230 meters deep. Its crescent shape is the result of the growth of Barujari in the eastern part of the caldera. In 1994, an eruption has further grow the volcano that now culminates at an altitude of 2300 meters above the level of the sea.
No significant seismic activity seems to have accompanied the explosion. The ash emission was too small to be detected on satellite data. The aviation alert level of the volcano was raised to Orange (VAAC Darwin).
“Be advised that there has been a small eruption of Rinjani at 10:45am this morning 25th October, 2015.
Those at the lake and trekking are being evacuated as a precaution.
Rinjani has been closed for all trekking until further notice. This also includes all hiking trails through the Rinjani National Park – either through Sembulan and Timbanuh, East Lombok, and Senaru and North Lombok – basically anywhere around the volcano is currently closed as a precaution.”
Rinjani volcano on the island of Lombok rises to 3726 m, second in height among Indonesian volcanoes only to Sumatra’s Kerinci volcano. Rinjani has a steep-sided conical profile when viewed from the east, but the west side of the compound volcano is truncated by the 6 x 8.5 km, oval-shaped Segara Anak (Samalas) caldera. The caldera formed during one of the largest Holocene eruptions globally in 1257 CE, which truncated Samalas stratovolcano. The western half of the caldera contains a 230-m-deep lake whose crescentic form results from growth of the post-caldera cone Barujari at the east end of the caldera. Historical eruptions dating back to 1847 have been restricted to Barujari cone and consist of moderate explosive activity and occasional lava flows that have entered Segara Anak lake.
October 26, 2015. Rinjani, île de Lombok , Indonésie :
Source : C Grandpey ( infolave) , The Gilis, Gili air , GVP.
Photo : The Gilis – Gili Air, Gili Meno and Gili Trawangan .