dc.contributor.author |
Sastri, J. H |
|
dc.contributor.author |
Ramesh, K. B |
|
dc.contributor.author |
Rao, J. V. S. V |
|
dc.date.accessioned |
2008-09-20T11:36:38Z |
|
dc.date.available |
2008-09-20T11:36:38Z |
|
dc.date.issued |
1985-07 |
|
dc.identifier.citation |
Solar Physics, Vol. 98, No. 1, pp. 177 - 192 |
en |
dc.identifier.issn |
0038-0938 |
|
dc.identifier.uri |
http://hdl.handle.net/2248/3742 |
|
dc.description.abstract |
To gain insight into the origin of enhanced geomagnetic activity that is recently reported to follow the 'disparition brusque' (DB) of quiescent solar filaments, a study is made of the interplanetary plasma and magnetic field data at 1 AU, in relation to DBs over the period of January 1967 through March 1978. The investigation revealed that the 'minor' and 'major' geomagnetic disturbances that manifested within 8 days of DBs almost invariably occurred (in 28 out of the 30 events studied) in association with the passage at earth of high-speed streams in the solar wind. A majority of the streams (19 out of the 28 streams) exhibited a 27-day recurrence pattern, and, thus, the associated enhancement in geomagnetic activity (and apparently followed DBs). The date of transit of the high-speed stream at earth seems to control the delay time of the geomagnetic disturbance, rather than the size of the filament. A systematic spatial relationship between DBs and the potential solar sources of the high-speed streams (coronal holes and flares) does not appear to be present. The results point out the relevance, and prominent role of, recurrent and transient high-speed structures in the solar wind in the enhancement of geomagnetic activity that accompanies DBs. |
en |
dc.language.iso |
en |
en |
dc.publisher |
Springer |
en |
dc.relation.uri |
http://dx.doi.org/10.1007/BF00177208 |
en |
dc.subject |
Geomagnetism |
en |
dc.subject |
Magnetic Disturbances, |
en |
dc.subject |
Solar Terrestrial Interactions |
en |
dc.subject |
Solar Wind |
en |
dc.subject |
Filaments |
en |
dc.subject |
Interplanetary Medium |
en |
dc.subject |
Space Plasmas |
en |
dc.subject |
Tables (Data) |
en |
dc.subject |
Time Lag |
en |
dc.title |
Geomagnetic disturbances associated with disappearing solar filaments |
en |
dc.type |
Article |
en |