TY - GEN
T1 - Pressure sources of the Miyakejima volcano estimated from crustal deformation studies during 2011–2013
AU - Fukui, Miyo
AU - Matsushima, Takeshi
AU - Yumitori, Natsumi
AU - Oikawa, Jun
AU - Watanabe, Atsushi
AU - Okuda, Takashi
AU - Ozawa, Taku
AU - Kohno, Yuhki
AU - Miyagi, Yousuke
N1 - Publisher Copyright:
© Springer International Publishing Switzerland 2015.
PY - 2017
Y1 - 2017
N2 - Following the eruption of the Miyakejima Volcano in the Izu Islands, Japan, in the year 2000, a continuous GPS network observed the ongoing contracting crustal deformation. Subsequently, a slight inflation of the island was detected from around 2006, and we initiated a campaign of dense GPS observations around the volcano from 2011. Precise crustal deformation studies indicated inflation in the southern part of the island and deflation around the center of the crater. Using these observations, we estimated that three magma sources (a shallow deflation sill under the crater, a southern inflation dyke, and a deep inflation spherical source) were activated during 2011–2013. In particular, the presence of an inflation dyke at an intermediate depth had not been inferred by previous studies. Accordingly, we posit that the supply of magma from a deep spherical source to the new dyke source has been initiated only recently.
AB - Following the eruption of the Miyakejima Volcano in the Izu Islands, Japan, in the year 2000, a continuous GPS network observed the ongoing contracting crustal deformation. Subsequently, a slight inflation of the island was detected from around 2006, and we initiated a campaign of dense GPS observations around the volcano from 2011. Precise crustal deformation studies indicated inflation in the southern part of the island and deflation around the center of the crater. Using these observations, we estimated that three magma sources (a shallow deflation sill under the crater, a southern inflation dyke, and a deep inflation spherical source) were activated during 2011–2013. In particular, the presence of an inflation dyke at an intermediate depth had not been inferred by previous studies. Accordingly, we posit that the supply of magma from a deep spherical source to the new dyke source has been initiated only recently.
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U2 - 10.1007/1345_2015_150
DO - 10.1007/1345_2015_150
M3 - Conference contribution
AN - SCOPUS:85009754098
SN - 9783319397672
T3 - International Association of Geodesy Symposia
SP - 117
EP - 123
BT - International Symposium on Geodesy for Earthquake and Natural Hazards (GENAH) - Proceedings of the International Symposium on Geodesy for Earthquake and Natural Hazards (GENAH)
A2 - Hashimoto, Manabu
PB - Springer Verlag
T2 - Proceedings of the International Symposium on Geodesy for Earthquake and Natural Hazards, GENAH 2014
Y2 - 22 July 2014 through 26 July 2014
ER -