日本地球惑星科学連合2023年大会

講演情報

[E] オンラインポスター発表

セッション記号 S (固体地球科学) » S-EM 固体地球電磁気学

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

2023年5月24日(水) 13:45 〜 15:15 オンラインポスターZoom会場 (4) (オンラインポスター)

コンビーナ:馬場 聖至(東京大学地震研究所)、後藤 忠徳(兵庫県立大学大学院理学研究科)、Yuguo Li(Ocean University of China)、Wiebke Heise(GNS Science, PO Box 30368, Lower Hutt, New Zealand)

現地ポスター発表開催日時 (2023/5/23 17:15-18:45)

13:45 〜 15:15

[SEM14-P14] Forward modeling of the EM-ACROSS at Inferno Crater Lake, New Zealand

*北岡 紀広1小川 康雄1石須 慶一2南 拓人3、Caldwell Grant4、Kirkby Alison4 (1.東京工業大学、2.兵庫県立大学、3.神戸大学、4.GNS Science)

キーワード:電磁アクロス、インフェルノクレーターレイク、順問題

Volcanic activity is interpreted to occur with the movement of fluids in the subsurface. Therefore, observing and monitoring the fluid-sensitive resistivity structure is important in the study of volcanic eruption prediction. A previous study (Legaz et al. 2009) showed that the Inferno Crater Lake on the North Island of New Zealand has cyclic resistivity variations due to a two-phase layer in the lower part of the lake. Therefore, our group conducted EM-Accurately Controlled Routinely Operated Signal System (EM-ACROSS) observations around the Inferno crater lake to observe the resistivity structure.
In this study, we developed a forward problem analysis code for the EM-ACROSS method. In this presentation, we analyze a model of the Inferno Crater Lake and show that the shape of the two-phase region can be identified from the simulated data.