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多道地震反封测线穿越了中部冲绳海槽的中央裂谷带,测线位于夏岛一84海凹附近,在这里观浏到了很高的热流值,这些多道反射记录显示出一些可能是岩浆房顶邵产生的反射波. 用10台海底地震仪和4叱炸药进行了地震折射研完,结果表明,中部冲绳海槽的地壳内,在一个强烈衰减的、6.8k血/s的层上边,有一个厚5 km、6.0 km/s的层.即使在震中距大于130 km的地方,也没有观测到来自莫霍界面的信号.这里的地壳被认为是大陆型的,但是地壳下部的Q值低,而上地慢顶部的波速和Q值都狠低. 用10台海底地震仪记录了一个月的天然地震,在这个地区测到了十分活跃的微震活动.有些海底地震仪记录到一些特殊震相,怀疑它们是来自岩浆席的反射波,类似于火山氮动产生的特珠波.
Multiple seismic anti-ICE lines traversed the central rift zone of the central Okinawa Trough and located near Hajudo-84, where high heat flow rates were observed. These multi-channel reflection records show some possibilities Is the reflected wave from the roof of the magma roof.The seismic refraction study conducted with 10 seabed seismometers and 4 叱 explosives showed that in the crust of the central Okinawa Trough in a strongly attenuated 6.8 k blood / s Above the layer, there is a layer of 5 km, 6.0 km / s, no signals from the Moho interface are observed even at epicenter distances greater than 130 km, where the crust is considered continental but the lower part of the crust Has a low Q and low velocity and Q at the slow top of the upper ground.One month’s natural earthquakes were recorded with 10 seabed seismographs and very active microseismic activity was detected in this area.Several seafloor seismographs recorded Some special phases are suspected to be reflected waves from the magma mat, similar to the special beads produced by volcanic nitrogen.