1998年9月24日地磁暴前宇宙线各向异性特性分析

分析了日本Nagoya 宇宙线闪烁体望远镜30°, 49°, 64° 倾角的东、西、南、北方向探测数据的变化特点, 运用小波分析方法定性地探讨了磁暴前后宇宙线南北、东西各向异性的变化特征. 研究发现, 当发 生大地磁暴时, 地面宇宙线强度的各向异性特征将发生非常大的变化, 这种变化一般在磁暴发生前10~20 h就开始出现. 当描述这种各向异性特征的各向异性指数的小波系数变化达到一定阈值时, 就可能有大地磁暴发生. 

Anisotropy Analyses of Cosmic Ray Before the Geomagnetic Storm on Sep.24,1998

Cosmic rays are energetic particles originating from outer space that impinge on Earth's atmosphere.Almost 90%of all the incoming cosmic ray particles are protons,about 9%are helium nuclei and about 1%are electrons.The nuclei that make up cosmic rays are able to travel from their distant sources to the Earth because of the low density of matter in space.Nuclei interact strongly with other matter,so when the cosmic rays approach Earth they begin to collide with the nuclei of atmospheric gases.These collision...