朝鲜2017年核爆对中国东北地区形变场的影响

基于19个连续GNSS观测站的多种采样率（10 Hz、1 Hz和30 s）数据，分析2017-09-03朝鲜核爆对中国东北地区地壳形变场的影响。静态位移分析结果显示，距核爆现场最近的GNSS观测站JLCB没有产生明显的同震形变，与基于均匀半无限弹性空间断裂位错模型正演模拟的结果一致；GNSS应变结果显示，此次核爆在东北区域引起主应变的略微调整，但总体调整量在10-8以内，没有引起区域范围内面应变的变化；高频GNSS动态形变分析结果显示，核爆在JLCB站处没有引起明显的波形变化。另外，高频GNSS受到多路径效应的影响，可能会引起cm级的扰动，利用恒星日滤波方法可以抑制多路径的影响，得到精度更高、更可靠的动态形变结果。

The Impact of the Nuclear Explosion of Democratic People’s Republic of Korea in 2017 on the Deformation Field in Northeast China

Based on observation data of various sampling rates (10 Hz, 1 Hz and 30 s) of 19 continuous GNSS stations, this paper analyzes the impact of the nuclear explosion of Democratic People’s Republic of Korea on the crustal deformation field in northeast China. The nearest GNSS site from the nuclear explosion is JLCB. The static displacement analysis results show that the JLCB station does not show obvious co-seismic deformation, which is consistent with the results of forward modeling based on the uniform semi-infinite elastic space dislocation model. The GNSS strain results show that the principle strain has a slight adjustment in the northeast region caused by the nuclear explosion; the adjustment was within 10-8, which does not cause the variation of the surface strain in the region. The results of high frequency GNSS dynamic deformation show that this event does not cause obvious dynamic deformation at the JLCB station. In addition, the high frequency results are affected by the multipath, which may cause centimeter-level disturbance. By the method of sidereal filtering, the influence of multipath can be suppressed, and the dynamic deformation results with higher precision and better reliability can be obtained.