| 晋冀鲁豫交界地区震源参数特征 |
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| 引用本文： | 张丽晓,赵翠萍,李艳娥,闫俊岗,张磊,谭青. 晋冀鲁豫交界地区震源参数特征[J]. 地震地磁观测与研究, 2018, 39(3): 22-29. DOI: 10.3969/j.issn.1003-3246.2018.03.004 |
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| 作者姓名： | 张丽晓 赵翠萍 李艳娥 闫俊岗 张磊 谭青 |
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| 作者单位： | 1.中国河北 056001 河北省地震局邯郸中心台;2.中国北京 100036 中国地震局地震预测研究所;3.中国北京 100081 中国地震局地球物理研究所 |
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| 基金项目： | 2016年河北省地震局三结合课题（课题号：SJH1607） |
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| 摘 要： | 利用晋冀鲁豫交界地区邯郸地震台网记录的地震波形资料，选取2005—2016年ML≥1.8地震事件，采用Brune震源模型，结合遗传算法得到该区中小地震震源参数，并分析各参数形态特征。研究表明：①晋冀鲁豫交界地区中小地震的地震矩取值范围1.34×1011—2.63×1015 N·m，震源半径取值范围132—1 044 m，拐角频率fc取值范围1.25—9.82 Hz，应力降取值范围0.036 4—11.063 1 MPa；②震源参数之间相互关系；③按照震中分区分析不同区域应力降分布特征，河北邯郸、邢台等地及附近地区应力降范围为0 MPa<Δσ≤5 MPa，河南濮阳以及范县和山西黎城等地及附近地区应力降范围为5 MPa <Δσ≤11.063 1 MPa，该区处于高应力背景场状态。
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| 关 键 词： | 震源谱 震源参数 应力降 |
The study of the characteristics of earthquake source parameters in the border area of Shanxi,Hebei Shandong and Henan |
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| Zhang Lixiao,Zhao Cuiping,Li Yan'e,Yan Jungang,Z. The study of the characteristics of earthquake source parameters in the border area of Shanxi,Hebei Shandong and Henan[J]. Seismological and Geomagnetic Observation and Research, 2018, 39(3): 22-29. DOI: 10.3969/j.issn.1003-3246.2018.03.004 |
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| Authors: | Zhang Lixiao Zhao Cuiping Li Yan'e Yan Jungang Z |
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| Affiliation: | 1.Handan Central Seismic Station, Hebei Earthquake Agency, Hebei Province 056001, China;2.Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China;3.Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | Using selected the seismic waveform data of ML ≥ 1.8 earthquake events in 2005-2016 recorded in Handan region network, where is in the border area of Shanxi-Hebei-Shandong-Henan, the source parameters of medium and small earthquakes in the region are obtained with the Brune model and genetic algorithm, and characteristics of source parameters are analyzed. The study results show that the range of seismic moments of the small and medium-sized earthquakes in the border area of Shanxi-Hebei-Shandong-Henan is 1.34×1011-2.63×1015 N·m, and the range of the focal radius is 132-1 044 m. The corner frequency is in the range from 1.25 Hz to 9.82 Hz. The range of stress reduction is 0.036 4-11.063 1 MPa. The source parameters are correlated. According the study of the distribution characteristics of stress reduction in different epicenter regions, the stress reduction in Handan and Xingtai, Hebei Province, in the range of 0 MPa < Δσ ≤ 5 MPa, while the stress reductions in Puyang and Fanxian, Henan Province and Licheng, Shanxi Province are in the range of 5 MPa < Δσ ≤ 11.063 1 MPa, where is in the state of high stress background. |
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| Keywords: | source spectrum parameters of earthquake stress reduction of source |
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