Latitudinal features of cosmic noise absorption at the time of SSC-triggered substorm as observed with scanning beam riometer
The scanning beam riometer at Syowa Station, Antarctica (Inv. Lat.=66.1°) detected spatial and temporal variations of the precipitation of energetic electrons responsible for the cosmic noise absorption (CNA) associated with the storm sudden commencement (SSC) at 2353 UT, November 3,1986 and the sub...
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Hiraiso Solar-Terrestrial Research Center, Communications Research Laboratory/National Institute of Polar Research
1989
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ftnipr:oai:nipr.repo.nii.ac.jp:00004059 2023-05-15T13:49:01+02:00 Latitudinal features of cosmic noise absorption at the time of SSC-triggered substorm as observed with scanning beam riometer Takashi Kikuchi Hisao Yamagishi 1989-11 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4059 http://id.nii.ac.jp/1291/00004059/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4059&item_no=1&attribute_id=18&file_no=1 en eng Hiraiso Solar-Terrestrial Research Center, Communications Research Laboratory/National Institute of Polar Research National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4059 http://id.nii.ac.jp/1291/00004059/ AA10756224 Proceedings of the NIPR Symposium on Upper Atmosphere Physics, 2, 9-14(1989-11) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4059&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1989 ftnipr 2023-01-14T19:56:31Z The scanning beam riometer at Syowa Station, Antarctica (Inv. Lat.=66.1°) detected spatial and temporal variations of the precipitation of energetic electrons responsible for the cosmic noise absorption (CNA) associated with the storm sudden commencement (SSC) at 2353 UT, November 3,1986 and the subsequent substorm. The SSC-associated precipitation was restricted equatorward of Syowa Station, while the substorm-associated precipitation started equatorward and was displaced poleward with stronger intensity at higher latitudes. It is deduced that the SSC-associated precipitation shifted equatorward at a speed of 500m/s, while the substorm-associated precipitation rapidly poleward at a speed of 5.8km/s. These results clearly indicate two kinds of energetic electrons associated with the SSC-triggered substorm. Particularly, the latitudinal feature of precipitation indicates that the energetic electrons associated with an SSC originate in the trapped radiation belt, which are forced to precipitate by a hydromagnetic shock propagated from the magnetopause. Report Antarc* Antarctica National Institute of Polar Research Repository, Japan Syowa Station |
institution |
Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
The scanning beam riometer at Syowa Station, Antarctica (Inv. Lat.=66.1°) detected spatial and temporal variations of the precipitation of energetic electrons responsible for the cosmic noise absorption (CNA) associated with the storm sudden commencement (SSC) at 2353 UT, November 3,1986 and the subsequent substorm. The SSC-associated precipitation was restricted equatorward of Syowa Station, while the substorm-associated precipitation started equatorward and was displaced poleward with stronger intensity at higher latitudes. It is deduced that the SSC-associated precipitation shifted equatorward at a speed of 500m/s, while the substorm-associated precipitation rapidly poleward at a speed of 5.8km/s. These results clearly indicate two kinds of energetic electrons associated with the SSC-triggered substorm. Particularly, the latitudinal feature of precipitation indicates that the energetic electrons associated with an SSC originate in the trapped radiation belt, which are forced to precipitate by a hydromagnetic shock propagated from the magnetopause. |
format |
Report |
author |
Takashi Kikuchi Hisao Yamagishi |
spellingShingle |
Takashi Kikuchi Hisao Yamagishi Latitudinal features of cosmic noise absorption at the time of SSC-triggered substorm as observed with scanning beam riometer |
author_facet |
Takashi Kikuchi Hisao Yamagishi |
author_sort |
Takashi Kikuchi |
title |
Latitudinal features of cosmic noise absorption at the time of SSC-triggered substorm as observed with scanning beam riometer |
title_short |
Latitudinal features of cosmic noise absorption at the time of SSC-triggered substorm as observed with scanning beam riometer |
title_full |
Latitudinal features of cosmic noise absorption at the time of SSC-triggered substorm as observed with scanning beam riometer |
title_fullStr |
Latitudinal features of cosmic noise absorption at the time of SSC-triggered substorm as observed with scanning beam riometer |
title_full_unstemmed |
Latitudinal features of cosmic noise absorption at the time of SSC-triggered substorm as observed with scanning beam riometer |
title_sort |
latitudinal features of cosmic noise absorption at the time of ssc-triggered substorm as observed with scanning beam riometer |
publisher |
Hiraiso Solar-Terrestrial Research Center, Communications Research Laboratory/National Institute of Polar Research |
publishDate |
1989 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4059 http://id.nii.ac.jp/1291/00004059/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4059&item_no=1&attribute_id=18&file_no=1 |
geographic |
Syowa Station |
geographic_facet |
Syowa Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4059 http://id.nii.ac.jp/1291/00004059/ AA10756224 Proceedings of the NIPR Symposium on Upper Atmosphere Physics, 2, 9-14(1989-11) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4059&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250461884579840 |