Fig. 8
a Fitting results for discharge mass by combination of two components: (1) best-fit function for the corrected GNSS time series (as shown in Fig. 5) and (2) best-fit function for the deflation volume time series of the shallow source: ΔVs(t) (as shown in Fig. 4). Red and blue colors correspond to satellite path of 126 and 20, respectively. Solid, dashed and dotted lines indicate synthetic Qout(t) (= Qd(t) + Qs(t)), Qd(t) and Qs(t). Gray-shaded area indicates range of estimated errors of the discharge mass. b Temporal change in the mass ratio of Qd(t) to Qout(t). Red and blue colors correspond to satellite path of 126 and 20, respectively. Value of more than 1.0 is due to fitting error