山西地震预警站网数据质量评估  

Data Quality Assessment of Shanxi Earthquake Early Warning Station Network

作　　者：丁大业 宫卓宏 徐博[1,2] 张文瑛 DING Daye;GONG Zhuohong;XU Bo;ZHANG Wenying(Shanxi Earthquake Agency,Taiyuan,Shanxi 030021,China;National Continental Rift Valley Dynamics Observatory of Taiyuan,Taiyuan,Shanxi 030025,China;Inner Mongolia Normal University,Huhehot,Inner Mongolia 010000,China)

机构地区：[1]山西省地震局,山西太原030021 [2]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025 [3]内蒙古师范大学,内蒙古呼和浩特010000

出　　处：《山西地震》2024年第3期21-27,共7页Earthquake Research in Shanxi

摘　　要：秒级地震预警信息发布和分钟级地震烈度速报服务要求高密度的预警台站分布及高质量的预警站网实时波形记录。面对数量庞大的预警台站,仅依靠人工监测方式难以第一时间发现波形异常台站,无法保证站网的观测数据质量。以在网运行的山西预警基准站、基本站、一般站的连续波形记录为基础,分别采用噪声功率谱分析法及以加速度噪声峰值PGA、速度噪声峰值PGV和位移噪声峰值PGD为指标评估山西预警站网三类站点的噪声水平,并用噪声功率谱面积占比法定量评估三类站点噪声水平。根据评估结果,对波形异常的站点进行排查处置,有助于台网运维人员及时发现异常站点及采取有效措施排除异常,提升站网观测数据质量及预警能力。The release of second level earthquake warning information and the rapid reporting service of minute level earthquake intensity require the establishment of high-density warning stations and high-quality real-time waveform recording of the warning station network.Faced with a large number of warning stations,relying solely on manual monitoring methods is difficult to detect waveform anomaly stations in a timely manner,and cannot guarantee the quality of observation data in the station network.Based on the continuous waveform records of Shanxi warning benchmark stations,basic stations,and general stations operating on the network,the noise power spectrum analysis method and the indicators of acceleration noise peak PGA,velocity noise peak PGV,and displacement noise peak PGD were used to evaluate the noise levels of the three types of stations in Shanxi warning station network.The noise power spectrum area ratio method was used to quantitatively evaluate the noise levels of the three types of stations.Based on the evaluation results,investigate and handle stations with abnormal waveforms.To provide effective support for network operation and maintenance personnel to timely detect abnormal stations and take effective measures to eliminate anomalies,and to improve the quality of station network observation data and early warning capabilities.

关 键 词：预警站网 数据质量 噪声功率谱 PGA PGV PGD 

分 类 号：P315.73[天文地球—地震学]