Fig. 5.From: Volume change of the magma reservoir relating to the 2011 Kirishima Shinmoe-dake eruption—Charging, discharging and recharging process inferred from GPS measurementsTemporal variation of the coefficient of spatial gradient of northwestward deformation (a in Eq. (2)). The values are estimated every 10 days over one year, and are smoothed under the assumption that the coefficient does not change too rapidly.Back to article page