What is a geomagnetic storm?
| Autor: | H. W. Kroehl, Bruce T. Tsurutani, J. A. Joselyn, Vytenis M. Vasyliunas, Gordon Rostoker, Walter D. Gonzalez, Yohsuke Kamide |
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| Rok vydání: | 1994 |
| Předmět: |
Ionospheric storm
Atmospheric Science Soil Science Aquatic Science Oceanography Physics::Geophysics Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Physics::Atmospheric and Oceanic Physics Ring current Earth-Surface Processes Water Science and Technology Geomagnetic storm Solar storm of 1859 Physics Ecology Paleontology Forestry Geophysics Solar wind Earth's magnetic field Space and Planetary Science Physics::Space Physics Disturbance storm time index May 1921 geomagnetic storm |
| Zdroj: | Journal of Geophysical Research. 99:5771 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/93ja02867 |
| Popis: | After a brief review of magnetospheric and interplanetary phenomena for intervals with enhanced solar wind-magnetosphere interaction, an attempt is made to define a geomagnetic storm as an interval of time when a sufficiently intense and long-lasting interplanetary convection electric field leads, through a substantial energization in the magnetosphere-ionosphere system, to an intensified ring current sufficiently strong to exceed some key threshold of the quantifying storm time Dst index. The associated storm/substorm relationship problem is also reviewed. Although the physics of this relationship does not seem to be fully understood at this time, basic and fairly well established mechanisms of this relationship are presented and discussed. Finally, toward the advancement of geomagnetic storm research, some recommendations are given concerning future improvements in monitoring existing geomagnetic indices as well as the solar wind near Earth. |
| Databáze: | OpenAIRE |
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