5:15 PM - 6:30 PM
[SEM35-P05] Crustal structure beneath the whole of Aso caldera by using 3-D electrical resistivity imaging
We carried out a Magnetotelluric (MT) survey at the entire Aso caldera from Nov. to Dec. 2015 and performed three-dimensional (3-D) inversion analyses to obtain a crustal-scale electrical resistivity structure (model) by using the period range between 0.005 and 2,380 s of MT data for 50 sites. Moreover, we performed another 3-D inversion analyses by using the period range between 0.007 and 1,365 s of MT data for 68 sites, which were obtained by surveys around Naka-dake from 1997 to 2001 [Takakura et al., 2000; Hashimoto et al., 2002; Asaue et al., 2006]. In the inversion process, we use a parallelized DASOCC inversion code [e.g., Siripunvaraporn et al., 2004; Siripunvaraporn and Egbert, 2009]. In this presentation, we will show the two crustal-scale resistivity models beneath Aso caldera, which were obtained by using the above-mentioned two MT data sets.