%0 Journal Article
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@nexthigherunit 8JMKD3MGPCW/3EU29DP
%@archivingpolicy denypublisher denyfinaldraft24
%@issn 1364-6826
%@usergroup administrator
%3 science.pdf
%@dissemination WEBSCI; PORTALCAPES; AGU; MGA; COMPENDEX.
%X Slow (VSW<400 km s-1) magnetic clouds have been analyzed to determine their characteristics and geoeffectiveness. It is found that slow clouds have mean magnetic field strengths of ~13 nT, peak BS~9 nT, and dawn–dusk electric fields of ESW~2.5 mV m-1. The clouds are small in spatial size, typically ~0.18 AU. The slowest events may have been accelerated to their speeds by interaction with the slow solar wind. Slow clouds are surprisingly geoeffective. Five out of 27 events caused major (DST-100 nT) magnetic storms. Likewise, these geoeffective clouds may have been decelerated to VSW<400 km s-1. The issue of interplanetary acceleration/deceleration will be examined with SOHO coronal mass ejection data in the near future.  Author Keywords: Slow (VSW<400 km s-1) magnetic clouds have been analyzed to determine their characteristics and geoeffectiveness. It is found that slow clouds have mean magnetic field strengths of ~13 nT, peak BS~9 nT, and dawn–dusk electric fields of ESW~2.5 mV m-1. The clouds are small in spatial size, typically ~0.18 AU. The slowest events may have been accelerated to their speeds by interaction with the slow solar wind. Slow clouds are surprisingly geoeffective. Five out of 27 events caused major (DST-100 nT) magnetic storms. Likewise, these geoeffective clouds may have been decelerated to VSW<400 km s-1. The issue of interplanetary acceleration/deceleration will be examined with SOHO coronal mass ejection data in the near future.
%8 Jan.
%N 2
%T Properties of slow magnetic clouds
%K Slow magnetic clouds, Geoeffectiveness, Interplanetary magnetic fields.
%@secondarytype PRE PI
%@group DGE-INPE-MCT-BR
%@copyholder SID/SCD
%@secondarykey INPE-10797-PRE/6253
%2 sid.inpe.br/marciana/2004/01.22.13.15.15
%@affiliation Jet Propulsion Laboratory, California Institute of Technology, MS 169-506, 4800 Oak Grove Drive,
%@affiliation Pasadena, CA 91109, USA,
%@affiliation Instituto Nacional de Pesquisas Espaciais, Sao Jose dos Campos, 12201-970, Sao Paulo, Brazil,
%@affiliation Goddard Space Flight Center, Greenbelt, MD 20771, USA,
%@affiliation Max-Planck-Institut für Aeronomie, Katlenburg-Lindau, D-37191, Germany,
%B Journal of Atmospheric and Solar-Terrestrial Physics
%@language English
%P 147-151
%4 sid.inpe.br/marciana/2004/01.22.13.15
%D 2004
%V 66
%A Tsurutani, Bruce T.,
%A González-Alarcon, Walter Demétrio,
%A Zhoua, Xian. Yan,
%A Leppingc, R. P.,
%A Bothmerd, V.,
%@area CEA