[Cover Photograph]

[Abstracts]

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[Frontispieces]

* Formation of new craters at the 2000 eruption of Usu volcano: An observation on Apr. 1

Akihiko TOMIYA (I-IIj [PDF : 978 KB]

* The 2000 eruption of Usu Volcano -situation around the active crater areas-

Shinji TAKARADA, Isobe MIYAGI and Akihiko TOMIYA (III-VI) [PDF : 2,415 KB]

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* Preface

Project Team for The 2000 eruption of Usu Volcano (133-134) [PDF : 163 KB]

* Observational research of the Geological Survey of Japan for the 2000 eruption of Usu volcano

Ishiyo ISOBE, Eijun OHTA, Kozo UTO, Jun'ichi ITOH, Hiroshi SHINOHARA and Genji SAITO (135-141) [PDF : 1,141 KB]

* Observation of water level, temperature and electric conductivity of groundwater around Usu volcano

Tsutomu SATO, Norio MATSUMOTO, Makoto TAKAHASHI, Eijun OHTA, Nobuo MATSUSHIMA, Fujio AKITA, Tomo SHIBATA and Atsuo SUZUKI (143-148) [PDF : 1,465 KB]

* Preliminary results of a high-resolution aeromagnetic survey over Usu Volcano, Hokkaido, Japan

Shigeo OKUMA, Tadashi NAKATSUKA, Rie MORIJIRI, Masahiko MAKINO, Toshihiro UCHIDA, Yasuo OGAWA, Shinichi TAKAKURA and Nobuo MATSUSHIMA (149-154) [PDF : 2,514 KB]

* Ground deformation of the Usu 2000 eruption: crack deformation measurements and theodolite monitoring at the northern and western foot of Usu Voclano, Japan

Toshikazu HASAKA, Yuichi NISHIMURA, Shinji TAKARADA, Yuhei TAKAHASHI, Mitsuru NAKAGAWA, Eiji SAITO, Kazuaki WATANABE, Kohei KAZAHAYA, Yoshihisa KAWANABE, Takahiro YAMAMOTO, Wataru HIROSE and Mitsuhiro YOSHIMOTO (155-166) [PDF : 8,957 KB]

* Volcanic ash falls from the 2000 Usu eruptions and situation at the source area

Shinji TAKARADA, Mitsuhiro YOSHIMOTO, Jun'ichi KITAGAWA, Naoto HIRAGA, Takahiro YAMAMOTO, Yoshihisa KAWANABE, Akira TAKADA, Shun NAKANO, Hideo HOSHIZUMI, Isoji MIYAGI, Yuichi NISHIMURA, Daisuke MIURA, Wataru HIROSE, Satoshi ISHIMARU, Yasuyuki KAKIHARA, Yuji ENDO, Masahiro YAWATA, Susumu NOROTA, Kiyoaki NIIDA, Yoshihiro ISHIZUKA, Takashi KUDO, Koji AIZAWA, Hiroshi Honma, Masamichi Egusa, Eiichi Ishii and Ryo Takahashi (167-179) [PDF : 17,464 KB]

* Volcanic plume monitoring system for the 2000 Usu eruption

Shinji TAKARADA, Yuji NISHI, Akira TAKADA, Nobuo MATSUSHIMA and Kohei KAZAHAYA (181-187) [PDF : 7,743 KB]

* Ash fall area associated with the Usu 2000 eruption observed by ASTER

Minoru URAI, Yoshihisa KAWANABE, Jun'ichi ITOH, Akira TAKADA and Masatane KATO (189-197) [PDF : 2,197 KB]

* Preliminary report on evolution of volcanic plume height associated with the Usu 2000 eruption (April 6 - 13)

Akira TAKADA, Shinji TAKARADA, Takahiro YAMAMOTO, Nobuo MATSUHIMA, Yuji NISHI, Wataru NISHI, Yasuyuki KAKIHARA, Jun TAJIKA, Yuji ENDO, Susumu NOROTA and Hokkaido Univ. (199-206) [PDF : 3,200 KB]

* Ground deforamtion monitoring during the 2000 eruption of Usu volcano

Eiji SAITO, Yuichi NISHIMURA, Kawanabe WATANABE, Shinji TAKARADA, Kozo UTO, Kohei KAZAHAYA, Yuhei TAKAHASHI and Toshikazu HASAKA (207-214) [PDF : 3,588 KB]

* Ground deforamtion monitoring during the 2000 eruption of Usu volcano

Eiji SAITO, Yuichi NISHIMURA, Kawanabe WATANABE, Shinji TAKARADA, Kozo UTO, Kohei KAZAHAYA, Yuhei TAKAHASHI and Toshikazu HASAKA (215-229) [PDF : 3,510 KB]

* The 2000 eruption of Usu volcano, Japan: characteristics of pheatomagmatic explosions and hazard evaluation for pyroclastic density currents

Takahiro YAMAMOTO (231-239) [PDF : 3,250 KB]

* Numerical simulation of tsunami in Lake Toya potentially generated by collapse of Mt. Usu

Kenji SATAKE (241-244) [PDF : 1,393 KB]