Fig. 7From: Volcanic unrest at Hakone volcano after the 2015 phreatic eruption: reactivation of a ruptured hydrothermal system?Sequential change of SO2 emission from Owakudani steaming area (after Abe et al, 2018). Black squares with error bars indicate measurements by Meteorological Research Institute (2015, 2016) and Hot Springs Research Institute of Kanagawa Prefecture (after 2017), while others (error bars only) are measurements by JMABack to article page