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Earth, Planets and Space
Fig. 9 | Earth, Planets and Space

Fig. 9

From: Volcanic deformation of Atosanupuri volcanic complex in the Kussharo caldera, Japan, from 1993 to 2016 revealed by JERS-1, ALOS, and ALOS-2 radar interferometry

Fig. 9

Temporal evolution of the maximum vertical displacement in each interferogram near the center of the deformation field. Each time series A–I shows independent time change defined in Table 1. In this figure, each time series is shifted vertically to show the smallest variation between the time series. Gray areas show no periods with InSAR data, and the vertical displacement time series do not have the same relationship with each other before and after the gray areas. Monthly number of earthquakes within the region (Fig. 2) is also plotted: Brown bars show those from 1993 to 1998 after Earthquake Research Institute (2002), and blue bars show those from 1999 to 2016 processed by the Japan Meteorological Agency (JMA). Earthquakes include those with magnitudes of more than 0.3 and depths shallower than 20 km. Given the revisions of observation points (etc.), the quality of seismic data is not uniform over time

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