• Adair, R. K., and H. Kasha (1976), Muon Physics, vol. 1, edited by V. W. Hughes, and C. S. Wu, 323 pp., Elsevier, New York.
  • Ambrosio, M., et al. (1995), Vertical muon intensity measured with MACRO at the Gran Sasso laboratory, Phys. Rev. D, 52, 37933802.
  • Barmin, A., O. Melnik, and R. S. J. Sparks (2002), Periodic behavior in lava dome eruptions, Earth Planet. Sci. Lett., 199, 173184.
  • Gonnermann, H. M., and M. Manga (2003), Explosive volcanism may not be an inevitable consequence of magma fragmentation, Nature, 426, 432435.
  • Groom, D. E. (2001), Muon stopping power and range tables 10 MeV–100 TeV, At. Data Nucl. Data Tables, 78, 183356.
  • Mangan, M., L. Masti, and T. Sisson (2004), Gas evolution in eruptive conduits: Combining insights from high temperature and pressure decompression experiments with steady-state flow modeling, J. Volcanol. Geotherm. Res., 129, 2336.
  • Nemoto, T., M. Hayakawa, K. Takahashi, and S. Koana (1957), Showa-shinzan jinetsu chitai no kazan chishitsu, oyobi chikyu butsuri/kagaku teki kenkyu (in Japanese), Rep. Geol. Surv. Jpn., 170, 1175.
  • Particle Data Group (1998), Cosmic Rays, Eur. Phys. J. C., 3, 132151.
  • Tanaka, H., K. Nagamine, N. Kawamura, S. N. Nakamura, K. Ishida, and K. Shimomura (2003), Development of a two-fold segmented detection system for near horizontally cosmic-ray muons to probe the internal structure of a volcano, Nucl. Instrum. Methods Phys. Res., Sect. A, 507, 657669.
  • Tanaka, H. K. M., K. Nagamine, S. N. Nakamura, and K. Ishida (2005), Radiographic measurement of the internal structure of Mt. West Iwate with near-horizontal cosmic-ray muons and future developments, Nucl. Instrum. Methods Phys. Res., Sect. A, 555, 164172.
  • Tanaka, H. K. M., T. Nakano, S. Takahashi, and K. Niwa (2007a), Development of an emulsion imaging system for cosmic-ray muon radiography to explore the internal structure of a volcano, Mt. Asama, Nucl. Instrum. Methods Phys. Res., Sect. A, 575, 489497.
  • Tanaka, H. K. M., T. Nakano, S. Takahashi, M. Takeo, J. Oikawa, T. Ohminato, Y. Aoki, E. Koyama, H. Tsuji, and K. Niwa (2007b), High resolution imaging in the inhomogeneous crust with cosmic-ray muon radiography: The density structure below the volcanic crater floor of Mt. Asama, Japan, Earth Planet. Sci. Lett., doi:10.1016/j.epsl.2007.09.001, in press.
  • Thompson, M. G., et al. (1975), The production spectra of the parents of vertical cosmic ray muons, J. Phys. G Nucl. Phys., 1, L48L50.
  • Yokoyama, I. (2002), Growth mechanism of the 1944 lava dome of Usu volcano in Hokkaido, Japan, Proc. Jpn. Acad., Ser. B, 78(1), 611.
  • Yokoyama, I. (2004), Formation processes of the 1909 Tarumai and the 1944 Usu lava domes in Hokkaido, Japan, Ann. Geophys., 47(6), 18111825.