On August 6,2023,an earthquake of magnitude 5.5 occurred in Pingyuan County,Dezhou City,marking the largest earthquake in Shandong in the past decade.In order to detect the near-field global navigation satellite system(GNSS)coordinate anomalies caused by this earthquake,this paper analyzed the GNSS observation data about 30 km around the epicenter and introduced the interquartile range to analyze the coordinate time series and coordinate velocity time series in the north(N),east(E),and up(U)directions.The results show that around the 10th and 11th seconds after the earthquake occurred,the coordinate time series in the N and E directions shows obvious anomalies,exceeding 0.5 times the normal value,while the coordinate time series anomaly in the U direction is not significant.The velocity time series in the N,E,and U directions detected anomalies at the 10th,11th,and 15th seconds after the earthquake occurred.This study successfully utilizes GNSS technology to detect near-field GNSS coordinate anomalies during the earthquake in Pingyuan County,Dezhou City.
关键词
全球导航卫星系统/坐标异常/地震/四分位距法
Key words
global navigation satellite system/coordinate anomaly/earthquake/interquartile range
维普
万方数据