| 江苏数字地震台网台站震级偏差的分析 |
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| 引用本文： | 詹小艳,王俊,缪发军,孙业君,郑江蓉,徐戈.江苏数字地震台网台站震级偏差的分析[J].地震地磁观测与研究,2010,31(2):44-49. |
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| 作者姓名： | 詹小艳 王俊 缪发军 孙业君 郑江蓉 徐戈 |
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| 作者单位： | 中国南京,210014,江苏省地震局 |
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| 基金项目： | 中国地震局"三结合"课题 |
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| 摘 要： | 利用江苏数字地震台网1999年1月1日-2008年12月31日3个以上子台记录到的约1 500条地震,以台网的平均震级为标准震级,详细分析了江苏数字台网子台的震级偏差原因,结果显示:①在震中距较小时(100 km),子台测定的震级偏小,在100 km△250 km范围内,震级偏差基本为零;②子台测定的震级偏差存在地域分布特征,随方位角显示趋势性变化,地区邻近的子台之间变化特征相近或相似;③江苏数字台网子台台基类型中松散沉积对震级影响最大,偏差均为正值,最大偏差约0.3级,灰岩类型的台基对震级测定影响最小,几乎为零。
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| 关 键 词： | 江苏数字台网 数字地震台 震级偏差 |
Analysis on the magnitudes determined by the substations of Jiangsu digital seismic network |
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| Zhan Xiaoyan,Wang Jun,Miao Fajun,Sun Yejun,Zheng Jiangrong,Xu Ge.Analysis on the magnitudes determined by the substations of Jiangsu digital seismic network[J].Seismological and Geomagnetic Observation and Research,2010,31(2):44-49. |
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| Authors: | Zhan Xiaoyan Wang Jun Miao Fajun Sun Yejun Zheng Jiangrong Xu Ge |
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| Institution: | (Earthquake Administration of Jiangsu Province, Nanjing 210014, China) |
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| Abstract: | In this paper, about 1 500 earthquake events recorded by Jiangsu digital seismic network from Jan 1,1999 to Dec 31,2008 were selected; taking the average magnitude as standard magnitude, for analyzing the reason of magnitude deviation of the substations in Jiangsu dig- ital seismic network. The result shows： （1）The magnitude measured by the substations is smaller when the epicentral distance is smaller （〈100 km）, when 100 km〈△〈250 km, magnitude deviation is basically equal to zero; （2）The magnitude deviation measured by the substations has a regional distribution, and has a trend variation with seismic azimuth. The changing characteristics of adjacent substations are similar;（3）Soft sediments have great impact on magnitude, with positive deviation; The impact of limestone is smallest. |
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| Keywords: | Jiangsu digital seismic network digital seismic station magnitude deviation |
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