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。
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.
2018,39(3): 22-29 收稿日期：2017-06-08
DOI：10.3969/j.issn.1003-3246.2018.03.004
基金项目：2016年河北省地震局三结合课题（课题号：SJH1607）
作者简介：张丽晓,男,工程师,硕士研究生,主要从事地震监测工作
参考文献：
阿依仙姑·买买提,尼鲁帕尔·买买吐孙,夏爱国,等. 新疆南天山西段中小地震震源参数初步研究[J]. 内陆地震,2014,28(4):379-386.
陈章立,等. 浅论地震预报地震学方法基础[M]. 北京:地震出版社,2004.
陈运泰. 地震预测:回顾与展望[J]. 中国科学:地球科学,2009,39(12):1 633-1 658.
华为,陈章立,郑斯华,等. 三峡水库地区震源参数特征研究[J]. 地震地质,2010,32(4):533-542.
季爱东,赵英萍,郑建常,等. 山东及邻近地区中小地震震源参数的测定[J]. 灾害学,2008,23(1):113-117.
梁秀英. 云南地震的震源参数特征[J]. 地震研究,1985,8(4):439-449.
刘丽芳,杨晶琼,华卫,等. 云南地区中小地震静力学和动力学参数定标关系[J]. 中国地震,2011,27(3):268-279.
龙政强,周斌,阎春恒,等. 广西主要断裂带中小地震震源参数研究[J]. 内陆地震,2015,29(4):309-316.
张天中,马云生,黄蓉良,等. 1995年陡河地震前后小震震源参数及其相互关系[J]. 地震学报,2000,22(3):233-240.
赵翠萍,陈章立,华卫,等. 中国大陆主要地震活动区中小地震震源参数研究[J]. 地球物理学报,2011,54(6):1 478-1 489.
Aki K, Richards P G. Quantitarive Seismology, Theory and Methods[M]. Freeman&Company San Francisco, California, 1980.
Allmannl B P, Shearer P M. Spatial and temporal stress drop variations in small earthquakes near Parkfield, Callfornia[J]. J Geophys Res, 2007, 112, B04305, doi:10.1029/2006JB004395.
Brune J N. Tectonic stress and the spectra of seismic waves from earthquakes[J]. J Geophys Res, 1970, 75:4 997-5 009.
Hardebeek J L. Allegra A. Earthquake stree drops and inferred fault strength on the Hayward fault, East San Francisco Bay, California[J]. Bull Seismol Soc Am, 2009, 99(3):l 801-1 814.
Jones L E, Helmberger D V. Earthquake source parameters and fault kinematic in the eastern California shear zone[J]. BSSA, 1998, 88(6):1 337-1 352.
Shearer P M, Prieto G A, Hauksson E. Comprehensive analysis of earthquake source spectra in sourthern California[J]. J Geophys Res, 2006, 111, B06303, doi:10.1029/2005JBOO3979.
Tusa G, Gresta S. Frequency-dependent attenuation of P waves and estimation of earthquake source parameters in Southeastern Sicily, Italy[J]. Bul1 Seismol Soc Am, 2008, 98(6):2 772-2 794.
