Preliminary Result of region w:st="on">Taiwanregion> 3D Stress Field from P Wave Polarity Data

详细信息   

• 责任者：Wan Yongge (Institute of Disaster-Prevention Science and Technology ; Sanhe 065201 ; China) ; Wu Yihmin
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(11)
• 关键词：应力场 ; stress fields ; 纵波 ; P-waves ; 台湾 ; Taiwan Province
• 页码：p.2809-2818
• 图表：5 illus., 33 refs.
• 分类号：0400
• 出版序号：20122227
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

The authors apply the composite focal mechanism method and use more than half million P wave polarity data to invert for the 3D stress field in Taiwan region. The authors present the focal mechanism result in a 0.25°×0.25°× 2.5 km grid in Taiwan and its adjacent areas. The preliminary result shows that the P and T axis directions change markedly across the Moho discontinuity. The P and T axis directions in the 15~45 km depth range also correlate with P wave velocity perturbations and delineate the northwestward subduction of the Philippine Sea Plate in Northeast Taiwan.