This study statistically examines the role of atmospheric blocking as a precursor of major seismic events. Atmospheric blocking archive and earthquake databases for the Middle East region are compiled for 2000–2013. Correlations between atmospheric blocking events and seismicity are examined based on defined seismo-climatic index (SCI) based on variations of earthquake frequency and magnitude before and after blocking events. Limiting the SCI index to values > 6, 16 out of 26 major earthquakes (M > 6), i.e. 62%, are shown to have occurred within 14 days after blocking events over their respective epicentral regions. The correlation between blocking events and subsequent seismicity falls into a range of 0.694–0.803. Additional blocking-related atmospheric anomalies such as cyclogenesis, cloud coverage, and anomalous rainfall prior to major earthquakes can be understood as processes that take place in the Earth’s crust and at the ground-to-air interface as a result of the stress activation of positive hole charge carriers at depth, in the hypocentral rock volume, and their rapid migration to the Earth’s surface. Hence, atmospheric blocking events in a seismically active region may be categorized as an earthquake precursory phenomenon.

中文翻译：

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使用新的地震气候指数检验中东地区大气阻塞与地震事件之间的关系

这项研究从统计学上考察了大气阻塞作为主要地震事件先兆的作用。编制了2000-2013年中东地区的大气阻挡档案和地震数据库。基于定义的地震气候指数（SCI），根据阻塞事件前后地震频率和震级的变化，检查大气阻塞事件与地震活动之间的相关性。将SCI指数限制为大于6，表明26个大地震中有16个（M> 6）（即62％）发生在各自震中区域阻塞事件发生后14天内。阻塞事件与后续地震活动之间的相关性处于0.694–0.803的范围内。其他与阻塞相关的大气异常，例如回旋，云层覆盖，大地震之前的降雨和反常降雨可以理解为由于地心深处的正孔电荷载流子在深部，正中岩体中的应力激活而在地壳和地对空界面中发生的过程。它们迅速迁移到地球表面。因此，在地震活跃区域中的大气阻塞事件可以被分类为地震先兆现象。