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The causes of goemagnetic activity
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Svalgaard, L. |
| Copyright Year | 1975 |
| Description | The causes of geomagnetic activity are studied both theoretically in terms of the reconnection model and empirically using the am-index and interplanetary solar wind parameters. It is found that two separate mechanisms supply energy to the magnetosphere. One mechanism depends critically on the magnitude and direction of the interplanetary magnetic field. Both depend strongly on solar wind speed. The energy input is modulated by the tilt of the dipole axis being maximum for 90 deg tilt against the solar wind flow direction. The energy input due to reconnection has no significant seasonal variations for equal amount of both sector polarities. |
| File Size | 1709698 |
| Page Count | 49 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19760011632 |
| Archival Resource Key | ark:/13960/t1gj48k1v |
| Language | English |
| Publisher Date | 1975-12-01 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Earth Magnetosphere Geomagnetism Annual Variations Solar Wind Velocity Interplanetary Magnetic Fields Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
