Fig. 7From: Subsurface magma movement inferred from extensometer and tiltmeter records during the early stage of the 2018 Shinmoe-dake eruptions, Japana Estimated depth and volume change for a source using EnKF. Red lines are calculated values, and gray areas correspond to the 95% confidence level. b Comparison of the observed (black) and calculated (red) |E2/E1| ratios at ISABack to article page