相关实验视频
由台风引发的缓慢的地震
ChiChing Liu1, Alan T Linde, I Selwyn Sacks
1Institute for Earth Sciences, Academica Sinica, 128 Sinica Road, Sec. 2, Nankang, Taipei 115, Taiwan, China. liucc@sinica.edu.tw
Nature
|June 12, 2009
概括
台风可以在台湾东部引发缓慢的地震. 这些缓慢滑动事件可能会分割断层区域,可能会抑制这个高度变形的区域中更大的地震断裂.
科学领域:
- 地质物理学 地质物理学
- 地震学 地震学
- 构造学 构造学 构造学 构造学
背景情况:
- 缓慢的地震,以逐渐的地震滑动为特征,已在全球范围内记录.
- 缓慢地震引发普通地震的可能性是正在进行的研究领域.
- 了解地震触发机制对于地震危险评估至关重要.
研究的目的:
- 调查台风在台湾东部引发缓慢地震的原因.
- 为了模拟控制台风引起的缓慢地震的物理过程.
- 评估缓慢地震在压缩构造环境中调节地震活动中的作用.
主要方法:
- 对台湾东部地震数据的分析.
- 在反向断层上缓慢滑动事件的数值建模.
- 在不同压力条件下的故障力学研究.
主要成果:
- 发现台湾东部的缓慢地震是由台风引发的.
- 建模表明,由台风引起的故障压力降低可以启动缓慢滑动.
- 研究的缓慢地震发生在一个向西倾斜的反向断层的缓慢滑动的重复事件中.
结论:
- 台风可以通过减少断层压力,作为缓慢地震的触发器.
- 反复发生的缓慢地震可能在对地震活跃区域进行细分方面发挥作用.
- 这种细分可以抑制高压缩变形地区的大型地震的发生.
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