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Kataoka, Ryuho*; Ebisuzaki, Toshikazu*; Miyahara, Hiroko*; Nimura, Tokuhiro*; Tomida, Takayuki*; Sato, Tatsuhiko; Maruyama, Shigenori*
Gondwana Research, 25(3), p.1153 - 1163, 2014/04
Times Cited Count：23 Percentile：55.41(Geosciences, Multidisciplinary)We propose the Nebula Winter model to explain catastrophic events of the earth, such as mass extinctions and snowball earth events. Encounters with nebulae, such as supernova remnants and dark clouds in the galaxy, can lead to a catastrophic environmental change on the Earth through the destruction of the ozone layer and climate forcing by enhanced fluxes of cosmic rays and cosmic dust particles.
Ebisuzaki, Toshikazu*; Miyahara, Hiroko*; Kataoka, Ryuho*; Sato, Tatsuhiko; Ishimine, Yasuhiro*
Gondwana Research, 19(4), p.1054 - 1061, 2011/06
Times Cited Count：8 Percentile：23.19(Geosciences, Multidisciplinary)We examined the timing of 11 eruptive events that produced silica-rich magma from four volcanoes in Japan (Mt. Fuji, Mt. Usu, Myojin-sho, and Satsuma-Iwo-jima) over the past 306 years (from AD 1700 to AD 2005). Nine of the 11 events occurred during inactive phases of solar magnetic activity (solar minimum), which is well indexed by the group sunspot number. This strong association between eruption timing and the solar minimum is statistically significant to a confidence level of 96.7%. This relationship is not observed for eruptions from volcanoes with relatively silica-poor magma, such as Izu-Ohshima.
Sasao, Eiji; Drake-Brockman, J.*
Gondwana Research, 4(4), p.771 - 772, 2001/10
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