Japan Geoscience Union Meeting 2023

Presentation information

[E] Online Poster

S (Solid Earth Sciences ) » S-EM Earth's Electromagnetism

[S-EM14] Electric, magnetic and electromagnetic survey technologies and scientific achievements

Wed. May 24, 2023 1:45 PM - 3:15 PM Online Poster Zoom Room (4) (Online Poster)

convener:Kiyoshi Baba(Earthquake Research Institute, The University of Tokyo), Tada-nori Goto(Graduate School of Science, University of Hyogo), Yuguo Li(Ocean University of China), Wiebke Heise(GNS Science, PO Box 30368, Lower Hutt, New Zealand)

On-site poster schedule(2023/5/23 17:15-18:45)

1:45 PM - 3:15 PM

[SEM14-P09] 3-D joint inversion of the AMT and ACTIVE datasets obtained in Aso volcano

*Takuto Minami1, Mitsuru Utsugi2, Wataru Kanda3 (1.Division of Frontier Planetology, Department of Planetology, Graduate School of Science, Kobe University, 2.Aso Volocanological Laboratory, Faculty of Science, Kyoto University, 3.Volcanic Fluid Research Center School of Science, Tokyo Institute of Technology)

Keywords:volcano, Aso, resistivity, controlled-source

We recently developed a joint inversion code for AMT data and data acquired by the controlled-source electromagnetic monitoring system called ACTIVE (Utada et al. 2007). We applied the inversion method to the real ACTIVE and AMT data obtained in Aso volcano. The results showed that the two types of datasets in Aso volcano have a tendency to demand different resistivity structures and it was difficult to reduce both RMSs simultaneously; the AMT data (Kanda et al. 2008) requires relatively conductive structures, while the ACTIVE data (Minami et al. 2018) does resistive ones. One possible approach to overcome this situation may be introduction of static shift parameters for the part of AMT inversion, which is possibly in turn determined by the ACTIVE datasets. In the presentation, we report the details of our joint inversion method and progress in the 3-D joint inversion of the AMT and ACTIVE datasets in Aso volcano.