Fig. 2

a Frequency of the observed duration of InSAR-measured displacement episodes, subdivided by whether deformation occurred in the period leading up to eruption (grey), during eruption (red) or during an inter-eruptive period (orange). b Relationship between approximate area of displacement signal as detected from InSAR measurements and the maximum detected rate of displacement in cm/yr. Note that the y-axis is logarithmic c Frequency of inferred maximum depths of deformation sources estimated from InSAR-measured displacements at intervals of 1 km, with same colour scheme as part (A). d) Boxplots illustrating distribution of deformation source depths inferred from InSAR measurements of deformation. The central dark line indicates median value, the box limits show upper and lower quartiles and red crosses show the locations of outliers