Abstract

The geoeffectiveness of single and complex transient structures of the solar wind (SW), formed by coronal mass ejections (CMEs) and associated Forbush decreases (FDs) in the cosmic ray flux is considered. By the example of the period of 2010–2011, it is shown that complex SW structures resulting from the interaction of CMEs with high-speed streams from coronal holes or with other CMEs in the heliosphere more often lead to moderate and strong geomagnetic storms (Dst < –50 nT) in comparison with single CMEs. It is shown that the FD increases with the growth of the SW transient structure duration and the average magnitude of the interplanetary magnetic field of the transient and takes the highest values when the complex structures arrive at the Earth.

中文翻译：

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与太阳风的单一和复杂瞬态结构有关的地磁风暴和前冲下降

摘要

考虑了由日冕质量抛射（CME）和相关的Forbush减少（FDs）形成的太阳射线（SW）的单个和复杂瞬态结构的地球效率，宇宙射线通量中。以2010-2011年为例，研究表明CME与日冕孔高速流或与日冕层中其他CME相互作用产生的复杂的西南构造更经常导致中等强度和强烈的地磁风暴（Dst <–50 nT）与单个CME相比。结果表明，FD随SW瞬态结构持续时间和瞬态行星际磁场平均幅度的增加而增加，并且在复杂结构到达地球时取最大值。