地震学报（英文版）2002，Vol.15Issue(3)：333-340,8.
Regionalized difference of the 660 km discontinuity beneath Izu-Bonin
Regionalized difference of the 660 km discontinuity beneath Izu-Bonin
摘要
Abstract
Digital waveform data recorded by the vertical component short period stations at the American networks of SCSN, NCSN and PNSN and three components broadband stations at the Germany and Swiss networks and arrays of GRFN, GRSN and SDSNet for the events between 1981 and 2000 under Izu-Bonin are used as data sets. The N-th root slant stack method was used to pick up the SdP phase converted at the velocity interface beneath source and the regionalized difference of the 660 km discontinuity beneath Izu-Bonin is studied. It is found that while the dip angles of the subducting slab and the maximal depths of sources increase gradually from 35(N to 26(N, the 660 km discontinuity appears regionalized differences. The discontinuity exists at 660 km while there is no effect from subducting slab, but it is depressed to the depth of 720 km while there are obvious effects. The dispersion of converted points is still an unsolved problem which maybe result from the complex structure of the discontinuity, converted phases which were misjudged, or the assumption of one dimensional spherical earth model.关键词
660 km discontinuity/N-th root slant stack/subducting slab/Izu-BoninKey words
660 km discontinuity/N-th root slant stack/subducting slab/Izu-Bonin分类
天文与地球科学引用本文复制引用
周元泽,蒋志勇,臧绍先..Regionalized difference of the 660 km discontinuity beneath Izu-Bonin[J].地震学报（英文版）,2002,15(3):333-340,8.基金项目
State Natural Science Foundation of China (49874020) and the Special Funds for Major State Basic Research of China (95-13-04-06). （49874020）
