Unzen paper is available online.
Triahadini A., Aizawa K., Hashimoto T. M., Chiba K., Uchida K., Yamamoto Y., Miyano K., Muramatsu D., Aniya S., Okubo A., Kawamura Y. (2023), Magma transport along structural boundaries in the upper crust: Insight from broadband magnetotelluric constraints on the structure beneath Unzen volcano, Japan, Geophysical Journal International. 234, 1268–1281. https://doi.org/10.1093/gji/ggad126
MT surveys on the foot of Unzen volcano.