CHANGES IN THE DIURNAL HOUR OF MAXIMUM OF THE COSMIC-RAY INTENSITY

Journal Article · Sun Oct 01 04:00:00 EDT 1961 · Canadian Journal of Physics

DOI:https://doi.org/10.1139/p61-174· OSTI ID:4837610

Katzman, J.

The diurnal hour of maximum of the meson component changed progressively at Ottawa, Canada, from 10 hr 44 min to 14 hr 40 min during the period January 1955 to December 1960 while the nucleon component changed from 12 hr 12 min to 15 hr 16 min for the same period. This evidence favors the 22-year cycle in the diurnal hour of maximum that was first suggested by Thambyahpillai and Elliot, for stations within a geomagnetic latitude belt between 58.1 deg N and 48.1 deg S. The diurnal hour of maximum at Churchill changed from 14 hr 40 min to 15 hr 24 min during the period April 1957 to December 1960 for the meson component and from 15 hr 12 min to 15 hr 52 min for the nucleon component. Although the change was for a later hour the indication of a 22-year cycle at Churchill is not impressive. At Resolute the diurnal hour of maximum is dominated by the varying magnetic masses in interplane tary space. It is shown that the anisotropy varies both in magnitude and direction depending on the cocilitions that exist in the solar system. (auth)

• Research Organization: National Research Council, Ottawa
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-032664
• OSTI ID: 4837610
• Report Number(s): NRC-6498; 0008-4204
• Journal Information: Canadian Journal of Physics, Journal Name: Canadian Journal of Physics Journal Issue: 10 Vol. 39; ISSN 0008-4204
• Publisher: Canadian Science Publishing
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANISOTROPY
COSMIC RADIATION
DIURNAL VARIATION
EARTH
LATITUDE EFFECT
MAGNETIC FIELDS
MESONS
NUCLEONS
PHYSICS
SPACE
SUN
VARIATIONS
ZONES