| タイトル | Geomagnetic response to magnetic clouds |
| 著者（英） | Wilson, Robert M. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 1987-03-01 |
| 言語 | eng |
| 内容記述 | Results of superimposed epoch analyses of hourly values of the equatorial Dst geomagnetic index and the B(x) component of the interplanetary magnetic field are given for 19 magnetic clouds. Results show statistical associations between magnetic clouds and geomagnetic storms, and between clouds without preceding shocks and gradual commencements. It was found that 75 percent of the clouds had a maximum Dst of less than -30 gammas, and that 95 percent of the clouds had a maximum Dst of less than about -16 gammas. In the main phase and recovery phase of geomagnetic storms, the Dst index simultaneously decreases to a large negative value at the onset of a large sustained southward magnetic field, and recovery starts when the magnetic field becomes northward. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 87A46272 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/376655 |
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