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Mass budget of the magma flow in the 2000 volcano-seismic activity at Izu-islands, Japan
Earth, Planets and Space volume 55, pages375–385(2003)
Eruptive and caldera-forming activity at Miyakejima volcano island, Japan, commenced on 26 June 2000 was accompanied by more than 40 day of seismic swarms and significant crustal deformation in the nearby islands and sea region besides those at Miyakejima itself. The migration of the hypocenters in the early stage suggests that they were triggered by magma intrusion from Miyakejima. However, it remains uncertain whether the long-lasting seismic swarms and ground displacements in the northern Izu-islands were totally maintained by the magma flow from Miyakejima, because another magma source nearby Kozushima was suggested previously, which is 40 km north-west of Miyakejima, based upon anomalous ground displacements. Here we report the detection of associated changes with the 2000 activity in both absolute gravity and elevation at Kozushima as well as those at Miyakejima. Combining these data with horizontal GPS displacements, we extend the analysis of Nishimura et al. (2001) and construct an optimum source model, so that we can account for the observed changes in geodetic data and determine the mass budget of the magma flow. The total mass of the newly intruded dike offshore of Miyakejima and nearby Kozushima turned out to be 130% or greater than the lost mass at Miyakejima. As long as there are no other source elements, another magma reservoir near Kozushima is required and is suggested to have been activated, causing the seismic swarms and crustal deformation. We may speculate as a phenomenology that the rapid lateral magma flow from Miyakejima in the very beginning of the unrest awakened a dormant reservoir offshore of Miyakejima and Kozushima.
Battaglia, M., G. Roberts, and P. Segall, Magma intrusion beneath long valley caldera confirmed by temporal changes in gravity, Science, 285, 2119–2122, 1999.
Dvorak, J. J. and D. Dzurisin, Volcano geodesy: The search for magma reservoirs and the formation of eruptive vents, Rev. Geophys., 35(3), 343–384, 1997.
Furuya, M., S. Okubo, W. Sun, Y. Tanaka, J. Oikawa, H. Watanabe, and T. Maekawa, Spatio-temporal gravity changes at Miyakejima volcano, Japan: Caldera collapse, explosive eruptions and magma movement, J. Geophys. Res., 108(B4), 2219, doi:10.1029/2002JB001989, 2003.
Hasegawa, H., M. Murakami, H. Masaharu, K. Matsuo, and M. Koarai, Caldera subsidence measurement at Miyakejima summit, J. Geogr. Surv. Inst., 95, 121–128, 2001 (in Japanese).
Japan Meteorological Agency, National Catalogue of the Active Volcanoes in Japan—Second Edition—, Printing Bureau, Ministry of Finance, Japan, 500 pp, 1996 (in Japanese).
Japan Meteorological Agency, Recent seismic activity in the Miyakejima and Niijima-Kozushima region, Japan—the largest earthquake swarm ever recorded—, Earth Planets Space, 52, i–viii, 2000.
Kaidzu, M., T. Nishimura, M. Murakami, S. Ozawa, T. Sagiya, H. Yarai, and T. Imakiire, Crustal deformation associated with crustal activities in the northern Izu-islands area during the summer, 2000, Earth Planets Space, 52, ix–xviii, 2000.
Kimata, F., M. Satomura, Y. Sasaki, I. Murata, and K. Fuse, GPS measurements in the Tokai region and Izu Hachijo islands, Proceedings of the CRCM’93, 225–227, 1994.
Kimata, F., S. Kariya, M. Fujita, K. Matsumoto, T. Tabei, J. Segawa, and A. Yamada, Estimated pressure source on Kozu Island volcano, South Central Japan, from GPS measurements (July 1996–August 1999), Earth Planets Space, 52, 975–978, 2000.
Miyazaki, T., Features of Historical Eruptions at Miyake-jima Volcano, Bull. Volcanol. Soc. Japan, 11, S1–S15, 1984 (in Japanese with English abstract).
Mogi, K., Relations between the eruptions of various volcanoes and deformations of the ground surfaces around them, Bull. Earthq. Res. Inst., 36, 99–134, 1958.
Nakada, S., M. Nagai, A. Yasuda, T. Shimano, N. Geshi, M. Ohno, T. Akimasa, T. Kaneko, and T. Fujii, Chronology of the Miyakejima 2000 Eruption: Characteristics of summit collapsed crater and eruption products, J. Geogr., 110(2), 168–180, 2001 (in Japanese with English abstract).
Nakamura, K., K. Shimazaki, and N. Yonekura, Subduction, bending and eduction. Present and Quaternary tectonics of northern border of the Philippine Sea Plate, Bull. Soc. geol. France., 26(2), 221–243, 1984.
Niebauer, T. M., G. Sasagawa, J. E. Faller, R. Hilt, and F. J. Klopping, A new generation of absolute gravimeters, Metrologia, 32, 159–180, 1995.
Nishimura, T., S. Ozawa, M. Murakami, T. Sagiya, T. Tada, M. Kaidzu, and M. Ukawa, Crustal deformation caused by magma migration in the northern Izu Islands, Japan, Geophys. Res. Lett., 28, 3745–3748, 2001.
Okada, Y., Surface deformation due to shear and tensile faults in a half-space, Bull. Seismol. Soc. Am., 75, 1135–1154, 1985.
Okubo, S., Potential and gravity changes due to shear and tensile faults in a half-space, J. Geophys. Res., 97, 7137–7144, 1992.
Okubo, S. and H. Watanabe, Gravity change caused by a fissure eruption, Geophys. Res. Lett., 16, 445–448, 1989.
Rymer, H., J. Cassidy, C. A. Locke, and J. B. Murray, Magma movements in Etna volcano associated with the major 1991–1993 lava eruption: evidence from gravity and deformation, Bull. Volcanol., 57, 451–461, 1995.
Sakai, S., T. Yamada, S. Ide, M. Mochizuki, H. Shiobara, T. Urabe, N. Hirata, M. Shinohara, T. Kanazawa, A. Nishizawa, G. Fujie, and H. Mikada, Magma migration from the point of view of seismic activity in the volcanism of Miyake-jima Island in 2000, J. Geogr., 110(2), 145–155, 2001 (in Japanese with English abstract).
Tanaka, Y., S. Okubo, M. Machida, I. Kimura, and T. Kosuge, First detection of absolute gravity change caused by earthquake, Geophys. Res. Lett., 28, 2979–2981, 2001.
Tsukui, M. and M. Suzuki, Eruptive history of Miyakejima Volcano during the last 7000 years, Bull. Volcanol. Soc. Japan, 43, 149–166, 1998 (in Japanese with English abstract).
Wessel, P. and W. H. F. Smith, New, improved version of Generic Mapping Tools released, Eos Trans. AGU, 79(47), 579, 1998.
Yamaoka, K., What is happening beneath the ground of Miyakejima and Kozushima?—search for the origin the seismo-volcanic activity—, Kagaku, 70(11), 926–935, 2000 (in Japanese).
Yamaoka, K., M. Kudo, M. Kawamura, F. Kimata, and N. Fujii, Long-lasting dike intrusion in the 2000 eruption of Miyake-Jima Volcano—Where did the magma come from?—, J. Volcanol. Geotherm. Res., 2002 (submitted).
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Furuya, M., Okubo, S., Kimata, F. et al. Mass budget of the magma flow in the 2000 volcano-seismic activity at Izu-islands, Japan. Earth Planet Sp 55, 375–385 (2003). https://doi.org/10.1186/BF03351771
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