The Calculation of Far-Field Radiated Seismic Energy and Constraint on Near-Field Ground Motion

详细信息   

• 责任者：Liu Boyan (Graduate University ; Chinese Academy of Sciences ; Beijing 100049 ; China) ; Shi Baoping
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(10)
• 关键词：远震信号 ; teleseismic signals
• 页码：p.2597-2605
• 图表：6 illus., 4 tables, 20 refs.
• 分类号：0500
• 出版序号：20122250
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

For a circular fault model, the authors re-derive the mathematical expression for calculating the far-field radiated S-wave energy based on the slip-weakening model. Combined with near-fault work associated with permanent deformation of the medium due to fault slip, the authors also propose a new technique to restrain the bound of peak ground velocity (PGV) and peak ground acceleration (PGA), respectively. Taking 2008 M_W7.9 Wenchuan earthquake and 1999 M_S7.6 Chichi earthquake as examples, with a comparison to the McGarr and Fletcher approach and Brune model, the authors found that the values of near-fault particle velocities for these two earthquakes are generally smaller and closer to the values derived from real data.