skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: YEARLY VARIATION IN ACTIVITIES OF OUTBURSTS AT MICROWAVES AND FLARES DURING A SOLAR CYCLE WITH SPECIAL REFERENCE TO UNUSUAL COSMIC-RAY INCREASES

Abstract

An interesting characteristic of unusual cosmic-ray increases, that they occur only in ascending and descending phases of solar cycles avoiding the sunspot maxima, is investigated as to whether it is solar effect or not. It is shown that most intense outbursts of microwaves, which seem to be a good measure for the acceleration of particles in the solar atmosphere, show the same tendency as the cosmic-ray increases have, in spite of the fact that importance 3/sup +/ flares occur most frequently in sunspot maximum. This tendency might simply be due to some conditions unfavorable to accelerate particles at the sunspot maximum. However, if it is assumed that an eruption accompanying both a 3/sup +/ flare and an acceleration of appreciable number of particles is more intense than an eruption accompanying only a 3/sup +/ flare, it may be inferred that the most intense eruptions tend to occur away from the sunspot maximum actually avoiding the maximum phase. Unusual cosmic ray increases occurring away from the sunspot maximum may be a solar effect rather than an interplanetary modulation effect. (auth)

Authors:
;
Publication Date:
Research Org.:
Tokyo Univ.
OSTI Identifier:
4756086
NSA Number:
NSA-17-012912
Resource Type:
Journal Article
Journal Name:
J. Phys. Soc. Japan
Additional Journal Information:
Journal Volume: Vol: 17: Suppl. A-II; Other Information: Orig. Receipt Date: 31-DEC-63
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
PHYSICS; ATMOSPHERE; COSMIC RADIATION; ELEMENTARY PARTICLES; MICROWAVES; MODULATION; PULSES; SPACE; SUN; SUNSPOTS; VARIATIONS; VELOCITY

Citation Formats

Takakura, T, and Ono, M. YEARLY VARIATION IN ACTIVITIES OF OUTBURSTS AT MICROWAVES AND FLARES DURING A SOLAR CYCLE WITH SPECIAL REFERENCE TO UNUSUAL COSMIC-RAY INCREASES. Country unknown/Code not available: N. p., 1962. Web.
Takakura, T, & Ono, M. YEARLY VARIATION IN ACTIVITIES OF OUTBURSTS AT MICROWAVES AND FLARES DURING A SOLAR CYCLE WITH SPECIAL REFERENCE TO UNUSUAL COSMIC-RAY INCREASES. Country unknown/Code not available.
Takakura, T, and Ono, M. 1962. "YEARLY VARIATION IN ACTIVITIES OF OUTBURSTS AT MICROWAVES AND FLARES DURING A SOLAR CYCLE WITH SPECIAL REFERENCE TO UNUSUAL COSMIC-RAY INCREASES". Country unknown/Code not available.
@article{osti_4756086,
title = {YEARLY VARIATION IN ACTIVITIES OF OUTBURSTS AT MICROWAVES AND FLARES DURING A SOLAR CYCLE WITH SPECIAL REFERENCE TO UNUSUAL COSMIC-RAY INCREASES},
author = {Takakura, T and Ono, M},
abstractNote = {An interesting characteristic of unusual cosmic-ray increases, that they occur only in ascending and descending phases of solar cycles avoiding the sunspot maxima, is investigated as to whether it is solar effect or not. It is shown that most intense outbursts of microwaves, which seem to be a good measure for the acceleration of particles in the solar atmosphere, show the same tendency as the cosmic-ray increases have, in spite of the fact that importance 3/sup +/ flares occur most frequently in sunspot maximum. This tendency might simply be due to some conditions unfavorable to accelerate particles at the sunspot maximum. However, if it is assumed that an eruption accompanying both a 3/sup +/ flare and an acceleration of appreciable number of particles is more intense than an eruption accompanying only a 3/sup +/ flare, it may be inferred that the most intense eruptions tend to occur away from the sunspot maximum actually avoiding the maximum phase. Unusual cosmic ray increases occurring away from the sunspot maximum may be a solar effect rather than an interplanetary modulation effect. (auth)},
doi = {},
url = {https://www.osti.gov/biblio/4756086}, journal = {J. Phys. Soc. Japan},
number = ,
volume = Vol: 17: Suppl. A-II,
place = {Country unknown/Code not available},
year = {Mon Jan 01 00:00:00 EST 1962},
month = {Mon Jan 01 00:00:00 EST 1962}
}