Time evolution of the different gauge-invariant terms of dE_j/dt: F_Bn, Ej (top right panel, Eq. (51)), F_Vn, Ej (top left panel, Eq. (52)), dE_j/dt|_Var (bottom left panel, Eq. (50)), and dE_j/dt|_Diss (bottom right panel, Eq. (49)). The different colors present one simulation: dispersion central (red line), dispersion peripheral (green line), stretching (yellow line), and convergence (blue line). The yellow band corresponds to the onset phase of the eruption.