| 唐山地区波速比变化特征研究 |
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| 引用本文： | 王亚茹,宋昭,刘晓丹,郭蕾,王妍,王时,宫猛,王想.唐山地区波速比变化特征研究[J].大地测量与地球动力学,2019,39(7):686-690. |
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| 作者姓名： | 王亚茹 宋昭 刘晓丹 郭蕾 王妍 王时 宫猛 王想 |
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| 作者单位： | 河北省地震局,石家庄市槐中路262号,050021;河北省地震局,石家庄市槐中路262号,050021;河北省地震局,石家庄市槐中路262号,050021;河北省地震局,石家庄市槐中路262号,050021;河北省地震局,石家庄市槐中路262号,050021;河北省地震局,石家庄市槐中路262号,050021;河北省地震局,石家庄市槐中路262号,050021;河北省地震局,石家庄市槐中路262号,050021 |
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| 基金项目： | 河北省地震科技星火计划;中国地震局地震科技星火计划 |
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| 摘 要： | 选取唐山地区2008~2018年震相数据，利用单台多震和达法和多台多震和达法分别计算波速比，结合研究区内的地震活动对波速比的变化特征进行研究。结果显示，多台多震和达法得到的波速比结果较为稳定，而单台多震和达法得到的结果变化幅度大，显示更多细节；唐山地区ML≥4.5地震发生前单台波速比存在不同程度的异常，异常台站的方位与地震具有一定的对应性。
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| 关 键 词： | 唐山 地震 波速比 台站 |
Change Characteristics of Wave Velocity Ratio in Tangshan Area |
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| WANG Yaru,SONG Zhao,LIU Xiaodan,GUO Lei,WANG Yan,WANG Shi,GONG Meng,WANG Xiang.Change Characteristics of Wave Velocity Ratio in Tangshan Area[J].Journal of Geodesy and Geodynamics,2019,39(7):686-690. |
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| Authors: | WANG Yaru SONG Zhao LIU Xiaodan GUO Lei WANG Yan WANG Shi GONG Meng WANG Xiang |
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| Abstract: | We select the seismic phase reports of Tangshan region by Hebei digital seismic network from 2008 to 2018 and calculate the wave velocity ratio by multi station-multi earthquake method and single station-multi earthquake method. We then analyze the characteristics of wave velocity ratio change combined with seismic activity. The results show that using the velocity ratio by multi station-multi earthquake method is more stable, but the results by the single station-multi earthquake method show more detail, and low value anomaly appears in varying degrees before ML≥4.5 earthquakes in the Tangshan region. The locations of abnormal stations correspond to earthquakes, to some extent. |
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| Keywords: | Tangshan earthquake wave velocity ratio station |
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