| Characteristics of crustal strain associated with M=6.4 Baotou earthquake in 1996 |
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| 作者姓名： | 郭良迁 薄万举 胡新康 王敏 |
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| 作者单位： | GUO Liang-qian BO Wan-ju HU Xin-kang WANG Min First Crustal Deformation Monitoring Center，China Seismological Bureau，Tianjin 300180，China |
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| 基金项目： | State Key Basic Research Development and Programming Project (G1998040700) and State Natural Science Foundation of China (40174029). |
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| 摘 要： | Introduction Since the 1990s, GPS technique has been widely used in the crustal deformation measurement in China, which has promoted the development in geodynamic study. More and more attentions have been paid to GPS data in the study on crustal movement by the vast geoscientists and many significant results have been achieved (HUANG, et al, 1996; LI, et al, 1998; GUO, 2000). The North China is one of the areas to establish GPS monitoring networks earlier in China. After the establis…
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Characteristics of crustal strain associated with M=6.4 Baotou earthquake in 1996 |
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| GUO Liang-qian BO Wan-ju HU Xin-kang WANG Min First Crustal Deformation Monitoring Center,China Seismological Bureau,Tianjin ,China.Characteristics of crustal strain associated with M=6.4 Baotou earthquake in 1996[J].Acta Seismologica Sinica(English Edition),2002,15(4). |
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| Authors: | GUO Liang-qian BO Wan-ju HU Xin-kang WANG Min First Crustal Deformation Monitoring Center China Seismological Bureau Tianjin China |
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| Institution: | First Crustal Deformation Monitoring Center, China Seismological Bureau, Tianjin 300180, China |
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| Abstract: | Based on the horizontal crustal strain derived from GPS data and the rate accumulation intensity calculated from across-fault vertical deformation, the strain characteristics in the periods of 1992~1995, 1995~1996 and 1996~1999 in Baotou-Datong area is studied in the paper. From the comparison between the crustal strains before and after the M=6.4 Baotou earthquake occurred on May 3, 1996, it is considered that the high-magnitude area with predominant compressive strain might be the seismogenic zone for a coming strong earthquake. The area with the simultaneous higher surface strain, principal compressive strain, shear strain and tendency accumulation might be the place with higher risk of strong earthquakes. Generally, the area with low strain and predominant tensile strain might have a small possibility for strong earthquake development, which belongs to a stable area. The evolution of horizontal strain obtained from GPS measurements carried out in Baotou-Datong area in the period of 1992~1999 reflects the total developing and ending processes of the seismic episode from 1996 to 1998. The area with high and predominant compressive strain and the strain gradient zone can be considered as one of the indicators for determining the strong earthquake risk area in the future. |
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| Keywords: | crustal deformation Baotou earthquake GPS measurement |
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