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SPACE WEATHER,
VOL. 3,
S03001,
doi:10.1029/2004SW000104,
2005
Interplanetary sources of space weather disturbances in 1997 to 2000
A. V. Dmitriev
Institute of Space Science, National Central University, Chung-Li, Taiwan Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia
N. B. Crosby
Belgian Institute for Space Aeronomy, Brussels, Belgium
J.-K. Chao
Institute of Space Science, National Central University, Chung-Li, Taiwan
Abstract
Seventy-five disturbed intervals from 1997 through 2000 were analyzed and selected on the basis of space weather effect occurrences
such as significant compression of the dayside magnetosphere, strong magnetic storms, ionospheric perturbations, relativistic
electron enhancements, and increases in the rate of data failures and radiation doses on board the Mir station. Solar wind
disturbances were considered as the main factor influencing the Earth's magnetosphere. We distinguished four geoeffective
interplanetary (IP) phenomena: interplanetary coronal mass ejections (ICME), interplanetary forward shocks with compressed
region (IS), fast solar wind streams from coronal holes (CH), and corotating interaction regions (CIR) between the CH and
relatively slow ambient solar wind. Each selected interval was studied and classified under the IP phenomena that it was a
direct consequence of. It was found that IP phenomena “containing” ISs, ICMEs, and CIRs were mostly responsible for geosynchronous
magnetopause crossings, strong geomagnetic storms, and intensification of geomagnetically induced currents. The fast solar
wind streams from coronal holes controlled mainly geosynchronous relativistic electron enhancements. The rate of data failures
and variations of the radiation dose on board the Mir station were related to both IS-ICME and CIR-CH phenomena. Such a relationship
was interpreted in terms of (1) decrease of cutoff threshold for solar energetic particles due to the magnetospheric compression
and/or ring current intensification on the main phase of geomagnetic storms and (2) intensive relativistic electron precipitation
from the outer radiation belt and its contribution to the radiation conditions at low altitudes during recovery phase of recurrent
magnetic storms.
Received 16
July
2004;
accepted 7
January
2005;
published 15
March
2005.
Keywords: solar wind-magnetosphere coupling;
geomagnetic storms;
space radiation.
Index Terms: 2784 Magnetospheric Physics: Solar wind/magnetosphere interactions; 2111 Interplanetary Physics: Ejecta, driver gases, and magnetic clouds; 2102 Interplanetary Physics: Corotating streams; 2716 Magnetospheric Physics: Energetic particles: precipitating.
Read Full Article (file size: 1072954 bytes) Cited by
Citation: Dmitriev, A. V., N. B. Crosby, and J.-K. Chao
(2005),
Interplanetary sources of space weather disturbances in 1997 to 2000,
Space Weather,
3,
S03001,
doi:10.1029/2004SW000104.
Copyright 2005 by the American Geophysical Union.
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