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地震 ›› 2009, Vol. 29 ›› Issue (1): 85-91.

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汶川MS8.0地震孕震机理的形变证据与模型推演

薄万举, 杨国华, 张风霜   

  1. 中国地震局第一监测中心, 天津 300180
  • 收稿日期:2008-09-27 修回日期:2008-10-28 出版日期:2009-01-31 发布日期:2021-10-15
  • 作者简介:薄万举(1957-), 男, 天津宝坻人, 研究员, 主要从事地壳形变监测和地震预测等研究。
  • 基金资助:
    天津市基金项目和汶川大震科考预研究

Deformation Evidence and Model Deduction about the Generation Mechanism of the Wenchuan MS8.0 Earthquake

BO Wan-ju, YANG Guo-hua, ZHANG Feng-shuang   

  1. First Crust Deformation Monitoring and Application Center, CEA, Tianjin 300180, China
  • Received:2008-09-27 Revised:2008-10-28 Online:2009-01-31 Published:2021-10-15

摘要: 该文展示了汶川MS8.0地震区域南部多年流动水准测量给出的形变隆起图像、 震前川滇地区GPS给出的区域无旋转基准下的两期水平形变图像、 发震断裂带上耿达跨断层短水准震前变化以及GPS给出的震源区同震水平形变和垂直形变图像。 经综合推演, 给出了一个板内逆冲型强烈地震孕育发生的模型, 简称为“压升冲降”模型, 可使上述各异常变化的形变图像得到比较统一和一致的解释。

关键词: 汶川地震, 孕震机理, 形变, 模型, 水准, GPS

Abstract: This paper presents the ground raising image of the area to the south of the epicenter of the Wenchuan MS8.0 earthquake obtained from years' mobile leveling, the variation curve of Gengda short leveling across the fault on the epicenter, and the vertical and horizontal crust movement monitored by GPS in the area around the epicenter. A model for the generation of strong intra-plate thrust earthquake, shortly called PUTDOWN ( Press-Up and Thrust-Down) Model, is developed by integrated analysis and deduction, by which all the anomalies showed in the figures can be well understood coincidently.

Key words: Wenchuan earthquake, Earthquake generation model, Deformation, Leveling, GPS

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