2021年11月17日江苏大丰海域MS5.0地震震源深度对比分析

选取江苏测震台网震中距2°以内18个地震台站记录清晰的波形资料，使用单纯形、LocSAT、HypoSAT地震定位方法，分别采用华南速度模型、郯庐断裂带中南段速度模型以及IASP91全球速度模型，重新测定江苏大丰海域M_S5.0地震震源深度，对获取的深度值进行对比分析。结果表明:3种地震定位方法测定的震源深度结果接近，约为11 ± 2 km；HypoSAT定位方法计算结果较为稳定，IASP91、郯庐断裂带中南段模型均适用于该区域震源深度计算。 

Comparative analysis of focal depth of MS5.0 earthquake in Dafeng sea area of Jiangsu Province on November 17, 2021

In this paper, we selected the clear waveform data recorded by 18 seismic stations within 2° from the epicenter of Jiangsu seismic network, and remeasured the focal depth of the M_S5.0 earthquake in Dafeng sea area of Jiangsu Province by using the simple type, LocSAT and HypoSAT seismic positioning method, using the South China, the middle-south segment of Tan-Lu Fault Zone and IASP91 velocity model respectively. And the obtained depth values are compared and analyzed. The results show that the focal depths measured by the three seismic location methods are close, about 11 ± 2 km; The calculation result of HypoSAT positioning method is relatively stable, and the models of IASP91 and the middle-south segment of Tan-Lu fault zone are suitable for the calculation of focal depth in this area.