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An active seismic experiment has been conducted across the southern Ryukyu margin east of Taiwan over the whole trench-arc-backarc system in May 2009. Twenty-four ocean bottom seismometers (OBS) were deployed from the Ryukyu trench to the southern Okinawa trough over the Ryukyu arc and forearc. Wide angle seismic data were recorded by the OBS array while coincident reflection seismic data were acquired...
Based on the analysis of 45 seismic reflection profiles, the top of the Ryukyu Arc basement is mapped in the forearc region east of Taiwan. The Ryukyu Arc slope dips 10° trenchward, while beneath the forearc basins, the arc basement shows a series of morphologic along-arc ‘highs-and-lows’. One of the basement highs, the Nanao basement rise, has been described as an area uplifted by the subduction...
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