根据焦点机制和应力逆转的基础上,更新了埃及阿布达巴布的地震构造框架
Mona Abdelazim1, Salah Elhadidy Youssef2, Hanan Gaber3
1Egyptian National Data Center (ENDC), National Research Institute of Astronomy and Geophysics (NRIAG), Elmarsad Street, Helwan, Cairo, 11421, Egypt.
Scientific reports
|February 13, 2026
概括
在埃及的地震活动.
科学领域:
- 地球科学 地球科学 地球科学
- 地震学 地震学
- 构造学 构造学 构造学 构造学
背景情况:
- 阿布达巴地震区是埃及红海边缘的一个高度活跃的地区.
- 它经历了频繁的微型地震,群体活动和重要的历史地震事件.
研究的目的:
- 分析阿布达巴布地震区的构造框架.
- 了解深度依赖的故障风格和压力模式.
主要方法:
- 2004年使用数字波形数据记录的408次地震 (Ml 0.7-3.0) 的分析.
- 从P波第一运动极性确定焦点机制.
- 在不同深度间隔的压力张量逆转.
主要成果:
- 观察到不同的故障风格 (正常,冲击滑动,反向,斜) 与深度依赖的模式.
- 浅层事件显示正常和冲滑断层;中间深度显示反向和斜断层;更深的事件主要是正常断层.
- 确定了一种多相应应激状态,在更深层次上存在主导的正常断层状态,与红海裂纹构造相一致.
结论:
- 应力场受南北向压缩和南北向延伸的影响,沿南北向和南北向断层集中变形.
- 地震性是由区域裂延伸和像岩入侵这样的局部因素驱动的.
- 这些发现增强了地震危险评估,并表明了这个构造活跃区域的地热能源潜力.
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