Unusual Plasma Conditions during may 23-25, 2002

Details Unusual Plasma Conditions during may 23-25, 2002 Unusual Plasma Conditions during may 23-25, 2002

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh72c..04b&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SH72C-04

Other

2111 Ejecta, Driver Gases, And Magnetic Clouds, 2134 Interplanetary Magnetic Fields, 2164 Solar Wind Plasma, 2724 Magnetopause, Cusp, And Boundary Layers

Scientific paper

We present an overview of the plasma conditions under the extreme tenuous plasma (Ne < 0.2 part/cm3) which started on May 23, 2002 and lasted for almost three days. During this unusual interval at times the magnetosonic speed is well above 300 km/s, and unusual close values in the ratio of plasma to cyclotron electron frequencies (fpe/fce ~ 10). Using waves and solar wind parameters from the Wind WAVES, EPAC, MFI and SWE experiments, we compare this event with other intervals during this solar cycle which also showed strong hindrance in the flow of the interplanetary solar wind. We further inquire on the nature of the event by looking at the earth's polar cusps response to the solar wind conditions, as illustrated by observations by satellites POLAR and POES, and investigate, using flux-rope models and energetic particles, the nature of this intriguing interplanetary structure.

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