• ISSN 1003-3238
  • CN 10-1702/P

中国大陆的地震破裂尺度关系

J. Cheng Y. F. Rong H. Magistrale G. H. Chen X. W. Xu 尹晓菲 李万金

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中国大陆的地震破裂尺度关系

  • 摘要: 震级与破裂尺度的关系描述了断层破裂的长度、宽度和面积随地震震级变化的特征。地震危险性模型中需要这些参数,以便将模型地震拟合到断层上,并确定地震动预测方程所需的地震破裂距离。我们收集了中国大陆及邻区91次地震的震级和破裂参数,以研究中国大陆震级—破裂尺度关系,并发现由不同方法得到的地下破裂长度(RLD)与震级关系不存在系统性偏差。我们使用广义正交回归法给出了地下破裂长度与震级和破裂宽度之间的关系,然后推导出破裂面积与震级之间的关系式。如果不考虑中国东部1900年以前的5次大地震,则我们的关系式与使用全球数据给出的结果统计上无差异。但是,如果考虑这5次大地震,中国东部大型走滑地震的震级—破裂长度尺度关系计算出的破裂长度比中国西部和世界其他板块边界相同震级地震的要短。
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中国大陆的地震破裂尺度关系

摘要: 震级与破裂尺度的关系描述了断层破裂的长度、宽度和面积随地震震级变化的特征。地震危险性模型中需要这些参数,以便将模型地震拟合到断层上,并确定地震动预测方程所需的地震破裂距离。我们收集了中国大陆及邻区91次地震的震级和破裂参数,以研究中国大陆震级—破裂尺度关系,并发现由不同方法得到的地下破裂长度(RLD)与震级关系不存在系统性偏差。我们使用广义正交回归法给出了地下破裂长度与震级和破裂宽度之间的关系,然后推导出破裂面积与震级之间的关系式。如果不考虑中国东部1900年以前的5次大地震,则我们的关系式与使用全球数据给出的结果统计上无差异。但是,如果考虑这5次大地震,中国东部大型走滑地震的震级—破裂长度尺度关系计算出的破裂长度比中国西部和世界其他板块边界相同震级地震的要短。

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