Interplanetary magnetic field control of dayside transient event occurrence and motion in the ionosphere and magnetosphere
The pressure pulse model for dayside transient ionospheric events predicts dawnward moving events at and prior to local noon during periods of spiral interplanetary magnetic field (IMF) orientation, but duskward moving events at and after local noon during rarer periods of orthospiral IMF orientatio...
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ftcopernicus:oai:publications.copernicus.org:angeo35582 2023-05-15T18:22:22+02:00 Interplanetary magnetic field control of dayside transient event occurrence and motion in the ionosphere and magnetosphere Korotova, G. I. Sibeck, D. G. Singer, H. J. Rosenberg, T. J. Engebretson, M. J. 2018-09-27 application/pdf https://doi.org/10.5194/angeo-22-4197-2004 https://angeo.copernicus.org/articles/22/4197/2004/ eng eng doi:10.5194/angeo-22-4197-2004 https://angeo.copernicus.org/articles/22/4197/2004/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.5194/angeo-22-4197-2004 2020-07-20T16:27:31Z The pressure pulse model for dayside transient ionospheric events predicts dawnward moving events at and prior to local noon during periods of spiral interplanetary magnetic field (IMF) orientation, but duskward moving events at and after local noon during rarer periods of orthospiral IMF orientation. We use this model to interpret ground and geosynchronous magnetometer observations of a duskward-moving transient event that occurred on 10 August 1995 during a period of orthospiral IMF orientation. We then survey geosynchronous GOES-8, 9, and 10 magnetometer observations to determine the directions of motion for 67 isolated magnetic impulse events seen in South Pole magnetograms from 1995-1999. The occurrence patterns and directions of motion inferred from both case and statistical studies are consistent with pressure pulse model predictions. Key words. Interplanetary physics (Interplanetary magnetic fields; discontinuities) – Magnetospheric physics (Magnetosphere-ionosphere interactions) Text South pole Copernicus Publications: E-Journals South Pole Annales Geophysicae 22 12 4197 4202 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The pressure pulse model for dayside transient ionospheric events predicts dawnward moving events at and prior to local noon during periods of spiral interplanetary magnetic field (IMF) orientation, but duskward moving events at and after local noon during rarer periods of orthospiral IMF orientation. We use this model to interpret ground and geosynchronous magnetometer observations of a duskward-moving transient event that occurred on 10 August 1995 during a period of orthospiral IMF orientation. We then survey geosynchronous GOES-8, 9, and 10 magnetometer observations to determine the directions of motion for 67 isolated magnetic impulse events seen in South Pole magnetograms from 1995-1999. The occurrence patterns and directions of motion inferred from both case and statistical studies are consistent with pressure pulse model predictions. Key words. Interplanetary physics (Interplanetary magnetic fields; discontinuities) – Magnetospheric physics (Magnetosphere-ionosphere interactions) |
format |
Text |
author |
Korotova, G. I. Sibeck, D. G. Singer, H. J. Rosenberg, T. J. Engebretson, M. J. |
spellingShingle |
Korotova, G. I. Sibeck, D. G. Singer, H. J. Rosenberg, T. J. Engebretson, M. J. Interplanetary magnetic field control of dayside transient event occurrence and motion in the ionosphere and magnetosphere |
author_facet |
Korotova, G. I. Sibeck, D. G. Singer, H. J. Rosenberg, T. J. Engebretson, M. J. |
author_sort |
Korotova, G. I. |
title |
Interplanetary magnetic field control of dayside transient event occurrence and motion in the ionosphere and magnetosphere |
title_short |
Interplanetary magnetic field control of dayside transient event occurrence and motion in the ionosphere and magnetosphere |
title_full |
Interplanetary magnetic field control of dayside transient event occurrence and motion in the ionosphere and magnetosphere |
title_fullStr |
Interplanetary magnetic field control of dayside transient event occurrence and motion in the ionosphere and magnetosphere |
title_full_unstemmed |
Interplanetary magnetic field control of dayside transient event occurrence and motion in the ionosphere and magnetosphere |
title_sort |
interplanetary magnetic field control of dayside transient event occurrence and motion in the ionosphere and magnetosphere |
publishDate |
2018 |
url |
https://doi.org/10.5194/angeo-22-4197-2004 https://angeo.copernicus.org/articles/22/4197/2004/ |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.5194/angeo-22-4197-2004 https://angeo.copernicus.org/articles/22/4197/2004/ |
op_doi |
https://doi.org/10.5194/angeo-22-4197-2004 |
container_title |
Annales Geophysicae |
container_volume |
22 |
container_issue |
12 |
container_start_page |
4197 |
op_container_end_page |
4202 |
_version_ |
1766201781528821760 |