高噪声背景下GNSS垂向分量应用探讨  

Application of GNSS Vertical Component with High Background Noise to Earthquake Prediction Research

作　　者：苏建锋[1] 薄万举[1] 

机构地区：[1]中国地震局第一监测中心,天津300180

出　　处：《地震》2016年第1期105-116,共12页Earthquake

基　　金：科技部基础工作专项(2015FY210400);地震科技星火计划项目(XH12071)项目联合资助

摘　　要：通过对部分GNSS连续站和全国多期GNSS区域站垂向复测资料的分析,对如何提取和利用GNSS垂向分量在高噪声背景下的有用信息进行了分析研究;结合地壳运动和地震孕育发生的机理,进一步讨论了GNSS垂向分量应用于地壳运动与强震预测的可能性。结果显示,GNSS垂向分量升降分布格局往往与大地构造格局和大地震孕育发生的区域密切相关,在机理上存在内在的联系。这些异常升降变化在精细的数据处理中通过某些要素的改正有可能被减弱或消除,但这种要素的异常也很可能与大地震的孕育过程相关。这一认识对地形变研究和大地震预测具有参考价值。Based on analysis of vertical component data from some auto-recorded GNSS stations and nationwide GNSS regional stations,we studied how to extract and use the information of vertical GNSS component under high noise background.Combined with the mechanisms of crust movement and that of earthquake generation,the possibility of strong earthquake prediction and crust movement study are further discussed with the use of GNSS vertical components.It is shown that the distribution of ascending stations and descending stations are closely related with geotectonic structures and great earthquake generation areas.Using fine data processing such as corrections based on some factors can weaken or eliminate abnormal ascending and descending.But abnormal variations of these factors are also in all probability related with great earthquake generation.These recognitions above have referential values for crust deformation research and great earthquake prediction.

关 键 词：GNSS 垂向分量 地壳运动 强震活动 

分 类 号：P315.7[天文地球—地震学]