Extremely periodic pulsating aurora observed near L=6: A new type pulsating aurora
Extremely periodic pulsating aurora, a new type pulsating aurora, was detected by three photometers (directing towards the zenith and 45° N and S in the meridian plane, for 427.8 nm emission) at Husafell in Iceland on 18-19 December 1985. We examined the characteristics of the pulsating auroras and...
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National Institute of Polar Research/University of Electro- Communications/Science Institute, University of Iceland
1999
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ftnipr:oai:nipr.repo.nii.ac.jp:00006278 2023-05-15T14:05:20+02:00 Extremely periodic pulsating aurora observed near L=6: A new type pulsating aurora Natsuo Sato Takeshi Nagato Thorsteinn Saemundsson 1999-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6278 http://id.nii.ac.jp/1291/00006278/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6278&item_no=1&attribute_id=18&file_no=1 en eng National Institute of Polar Research/University of Electro- Communications/Science Institute, University of Iceland National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6278 http://id.nii.ac.jp/1291/00006278/ AA11397422 Advances in polar upper atmosphere research, 13, 57-66(1999-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6278&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1999 ftnipr 2023-03-18T20:23:29Z Extremely periodic pulsating aurora, a new type pulsating aurora, was detected by three photometers (directing towards the zenith and 45° N and S in the meridian plane, for 427.8 nm emission) at Husafell in Iceland on 18-19 December 1985. We examined the characteristics of the pulsating auroras and their relationship to magnetic pulsations using the data obtained in Iceland and Syowa Station, the geomagnetically conjugate pair station in Antarctica. The characteristics of this event are as follows; 1) extremely regular periodic pulsating auroras with the frequency of -50 mHz were observed simultaneously on the 3 photometers, 2) the periodicity of the pulsation was extremely high, and the Q-value showed more than 20, 3) the intensity variation among the 3 photometers occurred with excellent coherency and simultaneously without time lag, suggesting that these pulsating auroras were not of a propagating type but a standing type, 4) there are no correlation between the optical pulsating auroras and magnetic pulsations on the ground. These characteristics suggest that the extremely periodic pulsating aurora on this event is not a common (popular) pulsating aurora but an exceptional type pulsating aurora which would occur under a certain condition in the magnetosphere. Report Antarc* Antarctica Iceland Advances in polar upper atmosphere research National Institute of Polar Research Repository, Japan Husafell ENVELOPE(-20.893,-20.893,64.700,64.700) Syowa Station |
institution |
Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Extremely periodic pulsating aurora, a new type pulsating aurora, was detected by three photometers (directing towards the zenith and 45° N and S in the meridian plane, for 427.8 nm emission) at Husafell in Iceland on 18-19 December 1985. We examined the characteristics of the pulsating auroras and their relationship to magnetic pulsations using the data obtained in Iceland and Syowa Station, the geomagnetically conjugate pair station in Antarctica. The characteristics of this event are as follows; 1) extremely regular periodic pulsating auroras with the frequency of -50 mHz were observed simultaneously on the 3 photometers, 2) the periodicity of the pulsation was extremely high, and the Q-value showed more than 20, 3) the intensity variation among the 3 photometers occurred with excellent coherency and simultaneously without time lag, suggesting that these pulsating auroras were not of a propagating type but a standing type, 4) there are no correlation between the optical pulsating auroras and magnetic pulsations on the ground. These characteristics suggest that the extremely periodic pulsating aurora on this event is not a common (popular) pulsating aurora but an exceptional type pulsating aurora which would occur under a certain condition in the magnetosphere. |
format |
Report |
author |
Natsuo Sato Takeshi Nagato Thorsteinn Saemundsson |
spellingShingle |
Natsuo Sato Takeshi Nagato Thorsteinn Saemundsson Extremely periodic pulsating aurora observed near L=6: A new type pulsating aurora |
author_facet |
Natsuo Sato Takeshi Nagato Thorsteinn Saemundsson |
author_sort |
Natsuo Sato |
title |
Extremely periodic pulsating aurora observed near L=6: A new type pulsating aurora |
title_short |
Extremely periodic pulsating aurora observed near L=6: A new type pulsating aurora |
title_full |
Extremely periodic pulsating aurora observed near L=6: A new type pulsating aurora |
title_fullStr |
Extremely periodic pulsating aurora observed near L=6: A new type pulsating aurora |
title_full_unstemmed |
Extremely periodic pulsating aurora observed near L=6: A new type pulsating aurora |
title_sort |
extremely periodic pulsating aurora observed near l=6: a new type pulsating aurora |
publisher |
National Institute of Polar Research/University of Electro- Communications/Science Institute, University of Iceland |
publishDate |
1999 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6278 http://id.nii.ac.jp/1291/00006278/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6278&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(-20.893,-20.893,64.700,64.700) |
geographic |
Husafell Syowa Station |
geographic_facet |
Husafell Syowa Station |
genre |
Antarc* Antarctica Iceland Advances in polar upper atmosphere research |
genre_facet |
Antarc* Antarctica Iceland Advances in polar upper atmosphere research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=6278 http://id.nii.ac.jp/1291/00006278/ AA11397422 Advances in polar upper atmosphere research, 13, 57-66(1999-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=6278&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766277151896633344 |