Solar source of the largest geomagnetic storm of cycle 23
نویسندگان
چکیده
منابع مشابه
Statistics of the largest geomagnetic storms per solar cycle ( 1844 ± 1993 )
A previous application of extreme-value statistics to the ®rst, second and third largest geomagnetic storms per solar cycle for nine solar cycles is extended to fourteen solar cycles (1844±1993). The intensity of a geomagnetic storm is measured by the magnitude of the daily aa index, rather than the half-daily aa index used previously. Values of the conventional aa index (1868± 1993), supplemen...
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On the basis of more than 48 years of morphological analysis of yearly and monthly values of the sunspot number, the aa index, the solar wind speed and interplanetary magnetic field, we point out the particularities of geomagnetic activity during the period 1996-2009. We especially investigate the last cycle 23 and the long minimum which followed it. During this period, the lowest values of the...
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We investigate the relationship between magnetic structures of CME source regions and geomagnetic storms, in particular the super storms when the Dst index decreases below -200nT. By examining all full halo CMEs that erupted between 1996 and 2004, we selected 73 events associated with M and X-class solar flares, which have a clearly identifiable source region. By analyzing daily full disk MDI m...
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چکیده ندارد.
15 صفحه اولSolar origins of solar wind properties during the cycle 23 solar minimum and rising phase of cycle 24
The solar wind was originally envisioned using a simple dipolar corona/polar coronal hole sources picture, but modern observations and models, together with the recent unusual solar cycle minimum, have demonstrated the limitations of this picture. The solar surface fields in both polar and low-to-mid-latitude active region zones routinely produce coronal magnetic fields and related solar wind s...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2005
ISSN: 0094-8276
DOI: 10.1029/2004gl021639