Fig. 4From: Assessing lava flow susceptibility at neighbouring volcanoes: Nyamulagira and Nyiragongo volcanoes, Virunga Volcanic ProvinceLong-term vent opening susceptibility during the next eruption of Nyamulagira (A) and Nyiragongo volcano (B). Map frame C shows the overlapping area between the vent opening susceptibility maps of Nyamulagira and Nyiragongo volcanoes. The dashed line shows the location where the vent opening susceptibility is equal to zero. Background: hillshade relief map of the SRTM 30 m DEMBack to article page