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| Titel |
Specific interplanetary conditions for CIR-, Sheath-, and ICME-induced geomagnetic storms obtained by double superposed epoch analysis |
| VerfasserIn |
Yu. I. Yermolaev, N. S. Nikolaeva, I. G. Lodkina, M. Yu. Yermolaev |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 28, no. 12 ; Nr. 28, no. 12 (2010-12-20), S.2177-2186 |
| Datensatznummer |
250016922
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| Publikation (Nr.) |
 copernicus.org/angeo-28-2177-2010.pdf |
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| Zusammenfassung |
| A comparison of specific interplanetary conditions for 798 magnetic storms
with Dst <−50 nT
during 1976–2000 was made on the basis
of the OMNI archive data. We categorized various large-scale types of solar wind
as interplanetary drivers of storms: corotating interaction region (CIR), Sheath,
interplanetary CME (ICME) including
both magnetic cloud (MC) and Ejecta, separately MC
and Ejecta, and "Indeterminate" type. The data processing was carried out by
the method of
double superposed epoch analysis which uses two reference times (onset of storm
and minimum
of Dst index) and makes a re-scaling of the main phase of the storm in a such way
that
all storms have equal durations of the main phase in the
new time reference frame. This method reproduced some well-known results and allowed
us to obtain some new results. Specifically,
obtained results demonstrate
that (1) in accordance with "output/input" criteria the highest efficiency
in generation of magnetic storms
is observed for Sheath and the lowest one for MC, and (2) there are
significant differences in the
properties of MC and Ejecta and in their
efficiencies. |
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