The DRE volume over time as a cumulative sum and by magnitude band. Cumulative DRE volume for the periods (a) 50 ka to 1 ka and (b) 1 ka to 2013. Eruptions responsible for large volume jumps are labelled and adjacent pie charts illustrate the percentage of volumes attributable to eruptions of different magnitudes. Note that the Kuwae eruption is controversial, with the magnitude and volume described in the literature as shown in the diagram from Hayakawa (1996) and Geyer and Martí (2008) respectively, as studies by Németh et al. (2007) found no evidence of caldera-scale deposits.