Height–time plot of the erupted MFR. The red “+” represents the evolution of the apex of the MFR axis, which is fitted by the function ﹩h(t)={c}_{0}{e}^{({\rm{t}}-{{\rm{t}}}_{0})/\tau }+{c}_{1}(t-{t}_{0})+{c}_{2}﹩ (blue curve). The three red-dashed vertical lines mark the boundaries of the four evolution phases and the three green-dashed vertical lines mark the times of the snapshots shown in Figure 3.