Fig. 8
From: Ash fall impact on vegetation: a remote sensing approach of the Oldoinyo Lengai 2007–08 eruption
Vegetation recovery indices for the ash affected area and its direct surroundings 1 month (first row), 12 months (second row) and 36 months (third row) after the end of the eruption. The graphs at the bottom give the temporal evolution of the recovery index value for the pixel marked by a red point in A for the period May 2008 to May 2013. a: Lack of Greenness (LG); (b) Change in NDVI (Tc); (c) Ash Recovery Index (ARI)