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强磁暴的时间分布特性
Dependence ofStongMagnetic Storm Numberon Solar Cycle
- DOI:
- 作者:
- 李琪1）高玉芬1）朱培育2）张秀玲3）
Li Qi1）, Gao Yufen1）, Zhu Peiyu2） and Zhang Xiuling3）
- 作者单位:
- 1）中国北京 100081 中国地震局地球物理研究所2）中国上海 202164 上海地震局崇明地震台3）中国北京 100095 中国地震局地球物理研究所北京地震台
1) Institute of Geophysics, China Earthquake Administration, Beijing 100081, China2) Chongming Observatory, Earthquake Administration of Shanghai, Shanghai 202164, China3) Beijing Observatory, Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
- 关键词:
- 强磁暴；太阳周；时间分布；年平均发生率；太阳黑子数
strong storms, solar cycle,temporal characteristic, average annual occurrence rate, sunspot number
- 摘要:
- 对比分析了1957~2008年间Dst≤-100nT的强磁暴数与太阳黑子数的变化趋势，发现太阳黑子数和Dst≤−100nT的强磁暴数的变化趋势有很好的一致性。进一步统计了强磁暴在太阳周不同阶段的分布后发现，同一太阳周内60%以上的强磁暴出现在下降年，但从太阳周各个阶段的平均磁暴年发生率来看，强磁暴平均年发生率最高的年份仍然是太阳活动极大年。
Dependence of strong geomagnetic storm number with Dst≤-100nTon solar cycle from 1957 to 2008 was statistically investigated, it is found that there is close relationship between the strong storm number and annual sunspot number。Dependence of strong storm number on difference phases of solar cycle revealed that more than 60% strong storms appeared in the declining phase. However, the maximum average annual occurrence rate still appeared in the year of the cycle maximum.
