The association between giant pulsations (Pgs) and the auroral oval
Two features of giant pulsations (Pgs) which still require an explanation are firstly, why Pgs occur mainly in the early morning sector (i.e. 03:00-07:00 MLT) and not at other times of day, and secondly, why Pgs occur preferentially in a narrow latitudinal band (approximately 63°-68° geomagnetic lat...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
1994
|
Subjects: | |
Online Access: | https://doi.org/10.1007/s00585-994-0649-4 https://doaj.org/article/1a35a3b142b54e78ae07e0caaea6d0ad |
id |
ftdoajarticles:oai:doaj.org/article:1a35a3b142b54e78ae07e0caaea6d0ad |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:1a35a3b142b54e78ae07e0caaea6d0ad 2023-05-15T16:04:41+02:00 The association between giant pulsations (Pgs) and the auroral oval G. Chisham D. Orr 1994-06-01T00:00:00Z https://doi.org/10.1007/s00585-994-0649-4 https://doaj.org/article/1a35a3b142b54e78ae07e0caaea6d0ad EN eng Copernicus Publications https://www.ann-geophys.net/12/649/1994/angeo-12-649-1994.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-994-0649-4 0992-7689 1432-0576 https://doaj.org/article/1a35a3b142b54e78ae07e0caaea6d0ad Annales Geophysicae, Vol 12, Pp 649-654 (1994) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 1994 ftdoajarticles https://doi.org/10.1007/s00585-994-0649-4 2022-12-31T12:37:49Z Two features of giant pulsations (Pgs) which still require an explanation are firstly, why Pgs occur mainly in the early morning sector (i.e. 03:00-07:00 MLT) and not at other times of day, and secondly, why Pgs occur preferentially in a narrow latitudinal band (approximately 63°-68° geomagnetic latitude). Using statistics from 34 Pg events observed by the EISCAT magnetometer cross, a comparison has been made between the location of the Pg resonant field lines and the equatorward edge of the auroral oval. The majority of these Pg events appear to occur just poleward of this boundary. Using these results, an explanation of the two features of Pgs as detailed above is made. This explanation involves the interaction of protons, which may be responsible for the Pg events, with the inner edge of the plasma sheet or with its ionospheric equivalent, the equatorward edge of the auroral oval. Article in Journal/Newspaper EISCAT Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 12 7 649 654 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 G. Chisham D. Orr The association between giant pulsations (Pgs) and the auroral oval |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
Two features of giant pulsations (Pgs) which still require an explanation are firstly, why Pgs occur mainly in the early morning sector (i.e. 03:00-07:00 MLT) and not at other times of day, and secondly, why Pgs occur preferentially in a narrow latitudinal band (approximately 63°-68° geomagnetic latitude). Using statistics from 34 Pg events observed by the EISCAT magnetometer cross, a comparison has been made between the location of the Pg resonant field lines and the equatorward edge of the auroral oval. The majority of these Pg events appear to occur just poleward of this boundary. Using these results, an explanation of the two features of Pgs as detailed above is made. This explanation involves the interaction of protons, which may be responsible for the Pg events, with the inner edge of the plasma sheet or with its ionospheric equivalent, the equatorward edge of the auroral oval. |
format |
Article in Journal/Newspaper |
author |
G. Chisham D. Orr |
author_facet |
G. Chisham D. Orr |
author_sort |
G. Chisham |
title |
The association between giant pulsations (Pgs) and the auroral oval |
title_short |
The association between giant pulsations (Pgs) and the auroral oval |
title_full |
The association between giant pulsations (Pgs) and the auroral oval |
title_fullStr |
The association between giant pulsations (Pgs) and the auroral oval |
title_full_unstemmed |
The association between giant pulsations (Pgs) and the auroral oval |
title_sort |
association between giant pulsations (pgs) and the auroral oval |
publisher |
Copernicus Publications |
publishDate |
1994 |
url |
https://doi.org/10.1007/s00585-994-0649-4 https://doaj.org/article/1a35a3b142b54e78ae07e0caaea6d0ad |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
Annales Geophysicae, Vol 12, Pp 649-654 (1994) |
op_relation |
https://www.ann-geophys.net/12/649/1994/angeo-12-649-1994.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-994-0649-4 0992-7689 1432-0576 https://doaj.org/article/1a35a3b142b54e78ae07e0caaea6d0ad |
op_doi |
https://doi.org/10.1007/s00585-994-0649-4 |
container_title |
Annales Geophysicae |
container_volume |
12 |
container_issue |
7 |
container_start_page |
649 |
op_container_end_page |
654 |
_version_ |
1766400296841379840 |