References / Note

References
   The 1st edition of the geological map of Usu Volcano (Soya et al., 1981) was revised from Ota (1956) and Katsui, Oba and Ono (attached to Yokoyama et al., 1973) with additions of data obtained or compiled by the authors at that time. The 2nd edition is based on the 1st edition and description of the 2000 eruption and some other revisions are added.

   Many references are available for Usu Volcano and this article was compiled incorporating those data. Major sources of the revision to the 2nd edition are shown here.

On the eruption of 1910 ( the 43rd year of Meiji ):
Omori, F.(1911）The Usu-san eruption and earthquake and elevation phenomena. Bull. Imp. Earthq. Inv. Com., vol. 5, no. 1, p. 1-38; no. 3, p. 101-107.
Sato, D. (1910) Preliminary Report on the Eruption of Usudake Volcano. Reports, Geol. Surv. Japan, no. 22, p. 1-46 (in Japanese).
Sato, D. (1913) Eruption of Mount Usu. Bull. Imp. Geol. Surv. Japan, vol. 23, no. 1, p. 1-54 (in Japanese with English abstract).
On the eruption of 2000 ( the 12th year of Heisei ):
"Special Section: The 2000 Eruption of Usu Volcano". Bull. Volcanol. Soc. Japan, vol. 47, nos. 3-5. (e.g., Ui et al., 2002; Nakagawa et al., 2002; Nagai et al., 2002; Ohno et al., 2002; Tomiya and Miyagi, 2002) (in Japanese with English abstract)
"Special Issue: The 2000 Eruption of Usu Volcano". Bull. Geol. Surv. Japan, vol.52, nos.4-5 (e.g., Takarada et al., 2001; Tomiya et al., 2001) (in Japanese with English abstract).
"Special Articles: 2000 eruption of Usu volcano". Report Geol. Surv. Hokkaido, no.73 (e.g., Hirose et al., 2002; Yahata et al., 2002) (in Japanese with English abstract).
Jour. Geographic. Surv. Inst., vol.95 (e.g., Sekiguchi et al., 2001; Murakami et al., 2001) (in Japanese).
Oshima, H. and Ui, T. (2003) The 2000 eruption of Usu volcano (In "Reports on volcanic activities and volcanological studies in Japan for the period from 1999 to 2002"). Bull. Volcanol. Soc. Japan, vol.48, no.4, Appendix, p.22-31.
On the geology, lithology and ash of Usu Volcano:
Geol. Surv. Hokkaido (2003) Report on land conditions of Mt. Usu for supporting recovery from the volcanic disaster. Geol. Surv. Hokkaido, 196p (in Japanese).
Geol. Surv. Hokkaido (2007) Ground Deformation Related to Eruptions of Usu Volcano, Japan. Geol. Surv. Hokkaido Special Report, no. 35, 162p (in Japanese).
Kondo, Y., Goto, H., Niida, K. and Katsui, Y. (1982) Geological Map of Usu Volcano, scale 1:10,000. Rept. Grant-in aid from the Ministry of Education, Science and Culture, Japan (leader, Kadomura, H.), no. A-57-7 (in Japanese).
Nakagawa M., Matsumoto A., Tajika J., Hirose W. and Ohtsu T. (2005) Re-investigation of eruption history of Usu Volcano, Hokkaido, Japan: finding of pre-Meiwa eruption (Late 17th Century) between Kanbun (1663) and Meiwa (1769) eruptions. Bull. Volcanol. Soc. Japan, vol. 50, p. 39-52 (in Japanese with English abstract).
Oba, Y.(1966）Geology and petrology of Usu Volcano, Hokkaido, Japan. Jour. Fac. Sci., Hokkaido Univ., Ser. IV, vol. 13, p. 185-236.
Oba, Y., Katsui, Y., Kurasawa, H., Ikeda, Y. and Uda, T. (1983) Petrology of historic rhyolite and dacite from Usu volcano, North Japan. Jour. Fac. Sci., Hokkaido Univ., Ser. IV, vol. 20, p. 275-290.
Ota, R. (1954) Explanatory text of the geological map of Japan, scale 1:50,000, "Abuta". Geological Survey of Japan, 76p (in Japanese with English abstract).
Tomiya, A. and Takahashi, E. (1995) Reconstruction of an evolving magma chamber beneath Usu volcano since the 1663 eruption. Jour. Petrol., vol. 36, p. 617-636.
Tomiya, A. and Takahashi, E. (2005) Evolution of the magma chamber beneath Usu volcano since 1663: A natural laboratory for observing changing phenocryst compositions and textures. Jour. Petrol., vol. 46, p. 2395-2426.
Yokoyama, I., Katsui, Y., Oba, Y. and Ehara, S. (1973) Usu-zan, its volcanic geology, history of eruption, present state of activity and prevention of disaster. Committee for Prevention of Disasters of Hokkaido, Sapporo, 254p (in Japanese).
For general description of volcanic activity:
Araya, T. and Ui, T. (Supervision) (2006) Usuzan Guide Book. Mount Usu Guidebook Research Group, Crisis & Environment Management Policy Institute, Tokyo, 50p.
Geological Survey of Japan (ed.) (2004) "Volcanoes - Challenge to Eruption". AIST series no. 6, Maruzen, Tokyo, 310p (in Japanese).
Committee for Prevention of Disasters of Hokkaido (2002) Volcanic Hazard Map of Usu Volcano. Kokusai Kogyo Co. Ltd., Tokyo, 2p (in Japanese).
Katsui, Y., Okada, H. and Nakagawa, M. (2007) Active Volcanoes in Hokkaido.  The Hokkaido Shimbun Press, Sapporo, 223p. (in Japanese)
Machida, H. and Arai, F. (2003) Atlas of Tephra in and around Japan [revised edition]. University of Tokyo Press, Tokyo, 336p. (in Japanese)
Takahashi, M. and Kobayashi, T. (ed.) (1998) Volcanoes in Hokkaido: Field Guide of Japanese Volcanoes, Vol. 3, Tsukiji-shokan, Tokyo, 152p.(in Japanese)
Yokoyama, I., Aramaki, S. and Nakamura, K. (ed.) (1992) Volcanoes. Iwanami-shoten, Tokyo, 306p (in Japanese).

Note
   Over 30cm thick volcanic products (geological units) are illustrated on the map. In Japanese version, old calendar is described in Chinese numeral, and new calendar is described in Arabic numerals.

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