Although the valleys between the major volcanoes boast fertile, ash-enriched soil for agriculture, available land is very limited.

[6] The volcano started to display increased activity on 24 June 2015, and on 29 June 2015, began to eject material causing a dust cloud that resulted in warnings being issued to residents within 3 kilometers (1.9 mi) radius of the caldera, and causing disruption to flights in and out of nearby Bali.

[7] According to Landsat images in early July 2015, a new lava pool had appeared on the mountain, in addition to the one already present.

[8] From July 9, 2015, several airports throughout Indonesia—including on the popular holiday island of Bali and in Surabaya during Idul Fitri—were closed due to the ash being produced by the eruptions.

The Raung Mountain complex serves as a natural hydrological boundary dividing seven drainage basins into three different directions.