Cosmic Ray Intensity Variations Observed at Matsushiro (220 M. W. E. I Depth)
Abstract
Cosmic ray data from Matsushiro underground station have been analyzed for four years (1981 - 84). It is found that a marked semi-annual intensity variation has been observed in this period. Solar diurnal and semi-diurnal variations have also been observed. After correcting for the spurious sidereal diurnal variation arising from the anisotropy responsible for the solar semi-diurnal variation (Nagashima et al., 1983), it is found that the corrected sidereal diurnal variation is consistent with those so far reported.
- Publication:
-
19th International Cosmic Ray Conference (ICRC19), Volume 5
- Pub Date:
- August 1985
- Bibcode:
- 1985ICRC....5...56Y
- Keywords:
-
- Annual Variations;
- Diurnal Variations;
- Harmonics;
- Japan;
- Particle Telescopes;
- Solar Cosmic Rays;
- Underground Acoustics;
- Atmospheric Temperature;
- Scintillation Counters;
- Space Radiation