| 高频GNSS观测快速估计地震震级及其精度评估 |
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| 引用本文： | 姚文敏,方荣新,王 珍,刘洪涛.高频GNSS观测快速估计地震震级及其精度评估[J].大地测量与地球动力学,2019,39(12):1249-1253. |
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| 作者姓名： | 姚文敏 方荣新 王 珍 刘洪涛 |
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| 摘 要： | 以2016-11-13新西兰地震为例，利用PANDA软件的精密单点定位(PPP)模块，基于高频GNSS数据分析地表形变并计算震级，在此基础上定量评估GNSS地震波测量精度对震级估计的影响。结果表明，当GNSS测站的峰值地面位移（PGD）精度在2 cm范围内时，对震级估计的误差影响在0.1以内。另外，由于震级估计与测站震中距和PGD有关，震中距越大，估计的震级对PDG越敏感。
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| 关 键 词： | 精密单点定位 地表形变监测 峰值地面位移 震级估计 震级精度 |
Use and Accuracy of High-Rate GNSS Observations to Quickly Estimate Earthquake Magnitude |
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| YAO Wenmin,FANG Rongxin,WANG Zhen,LIU Hongtao.Use and Accuracy of High-Rate GNSS Observations to Quickly Estimate Earthquake Magnitude[J].Journal of Geodesy and Geodynamics,2019,39(12):1249-1253. |
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| Authors: | YAO Wenmin FANG Rongxin WANG Zhen LIU Hongtao |
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| 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. |
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| Keywords: | precise point positioning surface deformation monitoring peak ground displacement magnitude estimation magnitude accuracy |
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