Abstract:Based on high-rate GNSS data which are collected from the New Zealand earthquake on November 13, 2016 and processed using the precise point positioning(PPP) module of PANDA software, this paper analyzes surface deformation and calculated magnitude. Then the impact of GNSS seismic wave measurement accuracy on magnitude estimation is quantitatively assessed. The results show that when the accuracy of peak ground displacement(PGD) is within 2 cm, the error of magnitude estimation is within 0.1 magnitude units. In addition, because the magnitude estimation is related to the epicenter distance and PGD of the station, when the epicenter is far away, the estimated magnitude is more sensitive to PDG.
YAO Wenmin,FANG Rongxin,WANG Zhen et al. Use and Accuracy of High-Rate GNSS Observations to Quickly Estimate Earthquake Magnitude[J]. jgg, 2019, 39(12): 1249-1253.