Procedure for deriving the Forbush decrease spectrum at shallow underground depths
Abstract On July 14, 1982 a Forbush decrease event of unprecedented magnitude was observed worldwide in the cosmic ray records up to particle rigidities of several hundred GV. At the same time the recently commissioned underground proportional counter telescope at Mawson, Antarctica, was recording a...
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Cambridge University Press (CUP)
1987
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crcambridgeupr:10.1017/s1323358000021925 2023-05-15T14:10:51+02:00 Procedure for deriving the Forbush decrease spectrum at shallow underground depths Duldig, M. L. 1987 http://dx.doi.org/10.1017/s1323358000021925 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1323358000021925 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Publications of the Astronomical Society of Australia volume 7, issue 1, page 92-94 ISSN 1323-3580 1448-6083 Space and Planetary Science Astronomy and Astrophysics journal-article 1987 crcambridgeupr https://doi.org/10.1017/s1323358000021925 2022-04-07T08:02:24Z Abstract On July 14, 1982 a Forbush decrease event of unprecedented magnitude was observed worldwide in the cosmic ray records up to particle rigidities of several hundred GV. At the same time the recently commissioned underground proportional counter telescope at Mawson, Antarctica, was recording a newly discovered cosmic ray modulation superposed on the Forbush event (Duldig, Jacklyn and Pomerantz 1985; Jacklyn, Duldig and Pomerantz 1987). The presence of the two phenomena led to complication in deriving the spectrum of the Forbush decrease for particle rigidities corresponding to the shallow observing depth. A technique for resolving such difficulties is presented and applied to the July 1982 decrease and the recurrence event 27 days later. The resulting spectral index γ was found to be ≈ −0.9, similar to the results of the extensive analysis of Russian surface and underground data by Kuzmin et al. (1983). Article in Journal/Newspaper Antarc* Antarctica Cambridge University Press (via Crossref) Jacklyn ENVELOPE(65.833,65.833,-70.267,-70.267) Publications of the Astronomical Society of Australia 7 1 92 94 |
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Cambridge University Press (via Crossref) |
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English |
topic |
Space and Planetary Science Astronomy and Astrophysics |
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Space and Planetary Science Astronomy and Astrophysics Duldig, M. L. Procedure for deriving the Forbush decrease spectrum at shallow underground depths |
topic_facet |
Space and Planetary Science Astronomy and Astrophysics |
description |
Abstract On July 14, 1982 a Forbush decrease event of unprecedented magnitude was observed worldwide in the cosmic ray records up to particle rigidities of several hundred GV. At the same time the recently commissioned underground proportional counter telescope at Mawson, Antarctica, was recording a newly discovered cosmic ray modulation superposed on the Forbush event (Duldig, Jacklyn and Pomerantz 1985; Jacklyn, Duldig and Pomerantz 1987). The presence of the two phenomena led to complication in deriving the spectrum of the Forbush decrease for particle rigidities corresponding to the shallow observing depth. A technique for resolving such difficulties is presented and applied to the July 1982 decrease and the recurrence event 27 days later. The resulting spectral index γ was found to be ≈ −0.9, similar to the results of the extensive analysis of Russian surface and underground data by Kuzmin et al. (1983). |
format |
Article in Journal/Newspaper |
author |
Duldig, M. L. |
author_facet |
Duldig, M. L. |
author_sort |
Duldig, M. L. |
title |
Procedure for deriving the Forbush decrease spectrum at shallow underground depths |
title_short |
Procedure for deriving the Forbush decrease spectrum at shallow underground depths |
title_full |
Procedure for deriving the Forbush decrease spectrum at shallow underground depths |
title_fullStr |
Procedure for deriving the Forbush decrease spectrum at shallow underground depths |
title_full_unstemmed |
Procedure for deriving the Forbush decrease spectrum at shallow underground depths |
title_sort |
procedure for deriving the forbush decrease spectrum at shallow underground depths |
publisher |
Cambridge University Press (CUP) |
publishDate |
1987 |
url |
http://dx.doi.org/10.1017/s1323358000021925 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1323358000021925 |
long_lat |
ENVELOPE(65.833,65.833,-70.267,-70.267) |
geographic |
Jacklyn |
geographic_facet |
Jacklyn |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Publications of the Astronomical Society of Australia volume 7, issue 1, page 92-94 ISSN 1323-3580 1448-6083 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s1323358000021925 |
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Publications of the Astronomical Society of Australia |
container_volume |
7 |
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1 |
container_start_page |
92 |
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94 |
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1766282962936004608 |