An Increase of the Primary Cosmic-Ray Intensity Following a Solar Flare

Observations of cosmic ray intensity depressions by earth bound neutron monitors and measurements of interplanetary parameter's variations aboard geocentric satellites in the period January 1972-July 1974 are analysed and grouped according to their correlation among them. From this analysis of about 30 cases it came out that the majority of the depressions correlates with the average propagation speed of interplanetary shocks as well as with the amplitude of the interplanetary magnetic field after the eruption of a solar flare. About one fourth of the events correlates with corotating fast solar wind streams. As the recovery time of the shock-related depressions depends strongly on the heliographic longitude of the causitive solar flare, it seems that the cosmic ray modulation region has a corotative-like feature.

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Cosmic ray intensity during solar flare of February 23, 1956

Physica ◽

10.1016/s0031-8914(56)80047-5 ◽

1956 ◽

Vol 22 (1-5) ◽

pp. 355-356 ◽

Cited By ~ 4

Author(s):

M.A. Assies ◽

H.F. Jongen

Keyword(s):

Solar Flare ◽

Cosmic Ray ◽

Cosmic Ray Intensity

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Effect of Solar Flare on Cosmic Ray Intensity

IETE Journal of Research ◽

10.1080/03772063.1966.11485321 ◽

1966 ◽

Vol 12 (6) ◽

pp. 352-362

Author(s):

Mangal Sain

Keyword(s):

Solar Flare ◽

Cosmic Ray ◽

Cosmic Ray Intensity

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Long Duration Solar Flare Events and Cosmic Ray Modulation (1969-1992)

International Astronomical Union Colloquium ◽

10.1017/s0252921100025914 ◽

1994 ◽

Vol 144 ◽

pp. 499-502

Author(s):

A. Antalová ◽

K. Kudela ◽

D. Venkatesan ◽

J. Rybák

Keyword(s):

Solar Cycle ◽

Solar Flare ◽

Solar Flares ◽

Cosmic Ray ◽

Flare Activity ◽

Cosmic Ray Intensity ◽

Cosmic Ray Modulation ◽

Long Duration ◽

Flare Index ◽

Galactic Cosmic Ray

AbstractWe present here the results of the correlation analysis between the galactic cosmic ray intensity decrease p (as observed on Calgary neutron monitor station) and the occurence of SXR long-lasting (LDE-type) solar flares, represented by the LDE-type flare index FI. It is shown, that for the solar cycle with the lower monthly values of FI (the 21-st solar cycle) the correlation coefficient is slighter (about 0.4) comparing to the cycles with the higher LDE-type flare activity (about 0.6, in the 20-th and the 22-nd cycles).

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Cosmic Ray Intensity Variations in Relation with Solar Flare Index and Sunspot Numbers

Solar Physics ◽

10.1007/s11207-006-0138-x ◽

2006 ◽

Vol 239 (1-2) ◽

pp. 475-491 ◽

Cited By ~ 11

Author(s):

A. P. Mishra ◽

Meera Gupta ◽

V. K. Mishra

Keyword(s):

Solar Flare ◽

Cosmic Ray ◽

Cosmic Ray Intensity ◽

Sunspot Numbers ◽

Flare Index

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Sudden Increases in Cosmic Ray Intensity

Australian Journal of Physics ◽

10.1071/ph690127 ◽

1969 ◽

Vol 22 (1) ◽

pp. 127

Author(s):

R Anda ◽

B Aparicio ◽

LV Sud ◽

M Zubieta

Keyword(s):

Cosmic Rays ◽

Solar Flare ◽

Cosmic Radiation ◽

Cosmic Ray ◽

Continuous Recording ◽

Intensity Increase ◽

The Sun ◽

Cosmic Ray Intensity

At different times during a period of continuous recording of cosmic rays large increases in the intensity of cosmic radiation have been observed. Most of these are associated with formations on the visible side of the Sun. However, there are two exceptions: Carmichael et al. (1961) believe that the November 20,1960 increase in intensity was due to a solar flare on the reverse side of the Sun, and Sud (1968) has shown that the intensity increase of January 28,1967 also may not be connected with chromospheric eruptions on the visible side of the Sun.

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