摘要
"重新修定ISC的观测报告(1964-2010)"是ISC正在进行的重要项目.ISC最新的定位方法和技术ISCloc是该项目采用的主要方法和技术,它包含四个特点:使用所有的可基于ak135走时模型预测的震相数据;可通过领域算法(NA)得到合适的初始点;在线性迭代最小二乘法时考虑了走时误差的互相关性;测定自由深度值前需满足一定的条件.ISCloc重新测定了1964-2010年间ISC先前所测的1100 000次以上的全球地震,以发震时刻、震中参数、地震波到时残差和震源深度为判据,从中选出需要重点进行人工分析和审核的地震180 000~200 000次.截至2015年底,已完成20世纪60年代地震的分析和审核,待全部地震汇编完成,估计要到2019-2020年.
＂Rebuild of the ISC bulletin（ 1964-2010） ＂ is an important project which is being undertaken by ISC. The main method and technique adopted in the project is the new ISC locator（ ISCloc） which includes four features： uses all reported phases with a valid ak135 travel time prediction; obtains an initial guess for the hypocentre using the Neighbourhood Algorithm; takes into account the correlated travel time prediction errors in a linearized iterative least squares location algorithm; meets some conditions before getting a free-depth solution. ISCloc relocated more than1100 000 global events which were reviewed by ISC before,and 180000-200 000 events needed for major manual analysis and edit are choosen out based on some criteria of the original times,epicenters,residusals of phase arrivals and focal depths. The analysis and edit of the events in 1960 s have been finished at the end of 2015,but it probably will be waited to the year 2019-2020 for the review of all events needed.
出处
《地球物理学进展》
CSCD
北大核心
2017年第3期968-975,共8页
Progress in Geophysics
