• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Characteristics of ground-level enhancement–associated solar flares, coronal mass ejections, and solar energetic particles
【24h】

Characteristics of ground-level enhancement–associated solar flares, coronal mass ejections, and solar energetic particles

机译：地面增强相关的太阳耀斑，日冕物质抛射和太阳高能粒子的特征

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ground-level enhancements (GLEs) are sudden, sharp, and short-lived increases in cosmic ray intensities registered by neutron monitors. These enhancements are known to take place during powerful solar eruptions. In the present investigation, the cosmic ray intensities registered by the Oulu neutron monitor have been studied for the period between January 1979 and July 2009. Over this span of time, increase rates of 32 GLEs have been deduced. In addition, we have studied characteristics of the 32 event-associated solar flares, coronal mass ejections (CMEs), and solar energetic particle (SEP) fluxes. We found that all of the 32 GLEs were associated with solar flares, CMEs, and SEP fluxes. Approximately 82% of the events were associated with X-class flares. Most of the flares that were associated with GLEs of increase rates >10% originated from the active regions located on the southwest hemisphere of the Sun. The average speed (1726.17 km/s) of GLE-associated CMEs was much faster than the average speed (423.39 km/s) of non-GLE-associated CMEs. It also became evident that —67% GLEs were associated with very fast (>1500 km/s) CMEs. Although a GLE event is often associated with a fast CME, this alone does not necessarily cause the enhancement. Solar flares with strong optical signatures may sometimes cause GLE. High SEP fluxes often seem to be responsible for causing GLEs as the correlation with SEP fluxes implies.
机译：地平面增强（GLE）是中子监测器记录的宇宙射线强度的突然，急剧和短暂的增加。已知这些增强会在强烈的太阳爆发期间发生。在本次调查中，研究人员对1979年1月至2009年7月之间由奥卢中子监测仪记录的宇宙射线强度进行了研究。在此期间，推论得出了32个GLE的增加率。此外，我们研究了32个事件相关的太阳耀斑，日冕物质抛射（CME）和太阳高能粒子（SEP）通量的特征。我们发现所有32个GLE与太阳耀斑，CME和SEP通量有关。大约82％的事件与X级耀斑有关。与GLE增长率> 10％相关的大多数耀斑起源于位于太阳西南半球的活跃区域。与GLE相关的CME的平均速度（1726.17 km / s）比非与GLE相关的CME的平均速度（423.39 km / s）快得多。同样明显的是，有67％的GLE与非常快（> 1500 km / s）的CME相关。尽管GLE事件通常与快速CME相关联，但仅此本身并不一定会导致增强。具有强烈光学特征的太阳耀斑有时会引起GLE。与SEP通量的相关性暗示，高SEP通量通常似乎是导致GLE的原因。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号