全球定位系统2024，Vol.49Issue(2)：76-81,6.DOI:10.12265/j.gnss.2023219
基于GNSS的2023年8月德州平原县5.5级地震异常环境响应分析
Analysis of anomalous environmental responses to the 5.5 earthquake in Pingyuan County,Dezhou in august 2023 based on GNSS
摘要
Abstract
To investigate the abnormal environmental response caused by the magnitude 5.5 earthquake in Pingyuan County,Shandong Province,on August 6th,2023,this study based on the Global Navigation Satellite System(GNSS)observation data located about 26 km northeast of the epicenter,proposes a moving time-varying frequency method and incorporates the interquartile range(IQR)method to analyze the abnormal environmental responses triggered by the earthquake.The results indicate significant anomalies in the N and E directional coordinate velocity time series at 9 to 10 seconds after the earthquake,with a minor anomaly in the U direction at 16 seconds.Moreover,the sliding time-varying frequency method detects noticeable changes 5 to 10 seconds before the abnormal jump in the velocity time series,demonstrating higher sensitivity.The study also discovered abnormal disturbances in the ionosphere above the epicenter the day before the earthquake,with the anomaly reaching 4 TECU.This research demonstrates the effectiveness of GNSS technology in detecting abnormal environmental responses during earthquakes,offering a new perspective and tools for earthquake monitoring and early warning.关键词
全球导航卫星系统(GNSS)/滑动时变频率/地震异常/四分位距(IQR)法Key words
Global Navigation Satellite System(GNSS)/moving time-varying frequency/earthquake anomalies/interquartile range method分类
天文与地球科学引用本文复制引用
王旭科,陈良周,姚伟..基于GNSS的2023年8月德州平原县5.5级地震异常环境响应分析[J].全球定位系统,2024,49(2):76-81,6.基金项目
中共甘肃省委组织部省级重点人才项目(2023RCXM35) （2023RCXM35）
甘肃省高校教师创新基金项目(2023B-296) （2023B-296）
甘肃省职业教育教学改革研究项目(2023gszyjy-013) （2023gszyjy-013）
全国煤炭行业职业教育研究课题(ZMZC2022018) （ZMZC2022018）
兰州资源环境职业技术大学校级科研项目(X2022C-03) （X2022C-03）
