Fig. 2

a Eruption in 1995 (Photo: C. Wilson, GNS Science VML 175785), and b image taken after the 2007 eruption (Photo: G. Jolly, GNS Science VML 190925)
a Eruption in 1995 (Photo: C. Wilson, GNS Science VML 175785), and b image taken after the 2007 eruption (Photo: G. Jolly, GNS Science VML 190925)