Figure 2 a) The thickness of erupted material by the end of phase 1 (April 5), end of phase 2 (April 26) and phase 4 (August 8, 2021). Purple line denotes initial fissure segment b–f) Eruption parameters of the Fagradalsfjall 2021 eruption showing the evolution of time-average discharge rate (TADR), volume, area, area change (dArea), and mean thickness. Orange boxes denote uncertainty in measurement. Blue crosses denote supporting TADR measurements (Supplement S2).