2006年唐山地区临时地震台网微震观测初步结果
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摘要
2006年8～10月在唐山-滦县地区布设了密集的临时地震台网,记录微震活动。临时台网由30台数字地震仪组成,台站间距为2～5km(其中2台仪器布设在唐山闹市区的大城山公园和南湖公园,进行强干扰背景下的地震观测试验)。现已得到由4个以上台站同时收到信号的398个地震的震源位置,而在相同时段从地震目录上仅能查到大约40次地震事件。这说明临时地震台网可以记录比区域台网更多的微震事件,为观测区构造研究提供更为丰富的基础信息。
From August to October,2006, a temporary seismostation network was densely set up in Tangshan-Luanxian region to record the microearthquake. This network was composed of 30 digital seismographs, and the intervals between stations were about 2 to 5 km.Among these stations two were located at the Dachengshan Park and the Nanhu Park in Tangshan, which were used for earthquake observation experiments under strong interference background. For nearly 3 months, 398 hypocenter locations were recognised of which their signals were received simultaneously by more than 4 stations. In the same period, however,only about 40 earthquakes can be found in Regional Seismic Catalogue. It shows that more microearthquakes can be observed by the temporary seismic station network, and thus it provides plentiful basic informations for techtonic study in the observed region.
From August to October,2006, a temporary seismostation network was densely set up in Tangshan-Luanxian region to record the microearthquake. This network was composed of 30 digital seismographs, and the intervals between stations were about 2 to 5 km.Among these stations two were located at the Dachengshan Park and the Nanhu Park in Tangshan, which were used for earthquake observation experiments under strong interference background. For nearly 3 months, 398 hypocenter locations were recognised of which their signals were received simultaneously by more than 4 stations. In the same period, however,only about 40 earthquakes can be found in Regional Seismic Catalogue. It shows that more microearthquakes can be observed by the temporary seismic station network, and thus it provides plentiful basic informations for techtonic study in the observed region.
引文
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6赖晓玲,张先康,杨健.二维反射地震成像——界面和速度联合反演[J].华北地震科学,1994,12(4):9-17.6Lai Xiaoling,Zhang Xiankang and Yang Jian.2D seismic reflection tomography——a joint inversion of velocity and in-terface[J].North Chana Earthquake Sciences,1994,12(4):9-17.(in Chinese)
7赖晓玲,张先康,郑需要.界面和速度的两步反演——唐山震区三维细结构研究[J].地震学报,1998,20(6):590-597.7Lai Xiaoling,Zhang Xiankang and Zheng Xuyao.Two-step interface and velocity inversion——Study of3D fine struc-ture of the Tangshan seismic region[J].Acta Seismologica Sinica,1998,11(6):687-697.
8赖晓玲,等.Pg回折波的上地壳三维层析成像[J].华北地震科学,1996,14(3):10-19.8Lai Xiaoling,et al.3D tomographic determination of supre-crust from Pg diving wave[J].North China Earthquake Sci-ences,1996,14(3):10-19.(in Chinese)
2赖晓玲,孙译,刘志.华北强震区地震测深研究[J].大地测量与地球动力学,2006,26(1):55-62.2Lai Xiaoling,Sun Yi and Liu Zhi.Study of deep seismic sounding in strongly seismic regions of North China[J].Journal of Geodesy and Geodynamics,2006,26(1):55-62.(in Chinese)
3滕吉文,等.渤海地球物理场与深部潜在地幔热柱异常构造背景[J].地球物理学报,1997,40(4):468～480.3Teng Jiwen,et al.geophysical fields and background of ex-ceptional structure for deep latent mantle plume in Bohai sea[J].Acta Geophysical Sinica,1997,40(4):468-480.(in chinese)
4赖晓玲,李松林,孙译.渤海及邻区3次7级以上地震的深部构造背景[J].大地测量与地球动力学,2007,27(1):31-33.4Lai Xiaoling,Li Songlin and Sun Yi.Deep tectonic back-ground of threeMs>7.0strong earthquakes in Bohai and its adjacent region[J].Journal of Geodesy and Geodynamics,2007,27(1):31-33.(in Chinese)
5姚雪绒,蒋长胜.唐山地震的地学研究文献目录及分析[J].国际地震动态,2006,7:245-176.5Yao Xuerong and Jiang Changsheng.Catalogue and analysis of papers on the study of Tangshan earthquake[J].Recent Developments in World Seismology,2006,7:245-176.(in Chinese)
6赖晓玲,张先康,杨健.二维反射地震成像——界面和速度联合反演[J].华北地震科学,1994,12(4):9-17.6Lai Xiaoling,Zhang Xiankang and Yang Jian.2D seismic reflection tomography——a joint inversion of velocity and in-terface[J].North Chana Earthquake Sciences,1994,12(4):9-17.(in Chinese)
7赖晓玲,张先康,郑需要.界面和速度的两步反演——唐山震区三维细结构研究[J].地震学报,1998,20(6):590-597.7Lai Xiaoling,Zhang Xiankang and Zheng Xuyao.Two-step interface and velocity inversion——Study of3D fine struc-ture of the Tangshan seismic region[J].Acta Seismologica Sinica,1998,11(6):687-697.
8赖晓玲,等.Pg回折波的上地壳三维层析成像[J].华北地震科学,1996,14(3):10-19.8Lai Xiaoling,et al.3D tomographic determination of supre-crust from Pg diving wave[J].North China Earthquake Sci-ences,1996,14(3):10-19.(in Chinese)
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