Local-Time-Dependent Pre-IMF-Shock Decrease of Cosmic Rays, Produced by Their IMF-Collimated Outward Flow across the

Kazuo Nagashima; Shizuko Sakakibara; Kazuhiko Fujimoto

doi:10.5636/jgg.45.535

Kazuo Nagashima, Shizuko Sakakibara, Kazuhiko Fujimoto

著者情報

ジャーナルフリー

1993 年 45 巻 6 号 p. 535-538

DOI https://doi.org/10.5636/jgg.45.535

詳細

Published: 1993 Received: 1993/03/11 Available on J-STAGE: 2007/04/03 Accepted: 1993/04/19 Advance online publication: - Revised: -
訂正情報
訂正日: 2007/04/03 訂正理由: - 訂正箇所: 論文受付日訂正内容: 訂正後 : 19930311

訂正日: 2007/04/03 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : In the previous paper (NAGASHIMA et al., 1992), the authors pointed out the existence of the local-time-dependent precursory decrease of cosmic rays in front of the shock wave of the interplanetary magnetic field (IMF), and interpreted it as being due to their IMF-collimated outward flow across the shock from the inside of the Forbush decrease (Fd). In the present paper, they report its typical example recently observed in front of the Fd on September 9, 1992, as it bears the following dominant characteristics. The precursory decrease was not only exceedingly significant but also observed twice at the same station for two days running, which could not be clearly recognized in the previous analysis without taking the average of many events, and it was observed also with the underground muon telescope at Sakashita (depth: 80 Hg/cm²), indicating its harder rigidity spectrum than the previous estimate. Based on these observations, the characteristics of the collimated flow responsible for the decrease is discussed.
Right : In the previous paper (NAGASHIMA et al., 1992), the authors pointed out the existence of the local-time-dependent precursory decrease of cosmic rays in front of the shock wave of the interplanetary magnetic field (IMF), and interpreted it as being due to their IMF-collimated outward flow across the shock from the inside of the Forbush decrease (Fd). In the present paper, they report its typical example recently observed in front of the Fd on September 9, 1992, as it bears the following dominant characteristics. The precursory decrease was not only exceedingly significant but also observed twice at the same station for two days running, which could not be clearly recognized in the previous analysis without taking the average of many events, and it was observed also with the underground muon telescope at Sakashita (depth: 80Hg/cm²), indicating its harder rigidity spectrum than the previous estimate. Based on these observations, the characteristics of the collimated flow responsible for the decrease is discussed.

訂正日: 2007/04/03 訂正理由: - 訂正箇所: 発行日訂正内容: 訂正前 : 19930620

訂正日: 2007/04/03 訂正理由: - 訂正箇所: 引用文献情報訂正内容: Wrong : FUJIMOTO, K., A. INOUE, K. MURAKAMI, and K. NAGASHIMA, Coupling coefficients of cosmic ray daily variations for meson telescopes, Rep. of Cosmic-Ray Research Laboratory, Nagoya University, page xiii, No. 9, 1984.
NAGASHIMA, K., K. FUJIMOTO, S. SAKAKIBARA, and I. MORISHITA, Local-time-dependent pre-IMF-shock decrease and post-shock increase of cosmic rays, produced respectively by their IMF-collimated outward and inward flows across hte shock responsible for Forbush decrease, Planet. Space, Sci., 40, 1109-1137, 1992.

訂正日: 2007/04/03 訂正理由: - 訂正箇所: PDFファイル訂正内容: -

抄録

In the previous paper (NAGASHIMA et al., 1992), the authors pointed out the existence of the local-time-dependent precursory decrease of cosmic rays in front of the shock wave of the interplanetary magnetic field (IMF), and interpreted it as being due to their IMF-collimated outward flow across the shock from the inside of the Forbush decrease (Fd). In the present paper, they report its typical example recently observed in front of the Fd on September 9, 1992, as it bears the following dominant characteristics. The precursory decrease was not only exceedingly significant but also observed twice at the same station for two days running, which could not be clearly recognized in the previous analysis without taking the average of many events, and it was observed also with the underground muon telescope at Sakashita (depth: 80Hg/cm²), indicating its harder rigidity spectrum than the previous estimate. Based on these observations, the characteristics of the collimated flow responsible for the decrease is discussed.

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