Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3406101g&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 6, CiteID L06101
Astronomy and Astrophysics
Astrophysics
28
Magnetospheric Physics: Ring Current, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Magnetic Storms And Substorms (7954), Solar Physics, Astrophysics, And Astronomy: Solar Activity Cycle (2162), Space Weather: Magnetic Storms (2788)
Scientific paper
We study the interplanetary causes of intense geomagnetic storms (Dst < -100 nT) that occurred during solar cycle 23 (1997-2005). It was found that the most common interplanetary structures leading to the development of an intense storm were: magnetic clouds, sheath fields, sheath fields followed by a magnetic cloud and corotating interaction regions leading high speed streams. However, the relative importance of each of those driving structures was found to vary with the solar cycle phase. We divide the cycle in three phases (rising, maximum and declining) and explain the differences. We also discuss about the geoeffectiveness of each of the four main interplanetary driving structures.
Clua-Gonzalez A. L.
Echer Ezequiel
Gonzalez Walter D.
Tsurutani Bruce T.
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