Results 161 to 170 of about 8,632 (194)

Relationship between Forbush effects and X-ray flares

Bulletin of the Russian Academy of Sciences: Physics, 2007
Statistical analysis of a large amount of data for three solar activity cycles (1975–2005) shows that the magnitude and other characteristics of Forbush effects are related to the intensity and longitude of previous solar flares.
A. V. Belov, E. A. Eroshenko, V. A. Oleneva, V. G. Yanke   +3 more
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Forbush effects with a sudden and gradual onset

Geomagnetism and Aeronomy, 2012
For a comprehensive study of the Forbush effects and their relation to solar and geomagnetic activity, a database of transient phenomena in cosmic rays and the interplanetary medium has been created, which is continuously updated with data on new events.
A. A. Abunin, M. A. Abunina, A. V. Belov, E. A. Eroshenko, V. A. Oleneva, V. G. Yanke   +5 more
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Specific features of the rigidity spectrum of Forbush effects

Geomagnetism and Aeronomy, 2017
We analyze variations in the rigidity spectrum of primary cosmic rays during Forbush effects recorded in cycles 20–24 of solar activity on the basis of data from the global network of neutron monitor stations processed by global survey. We investigate variations in the rigidity spectrum index of Forbush effects as a function of the solar activity level,
A. I. Klyueva, A. V. Belov, E. A. Eroshenko   +2 more
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Connection of Forbush effects to the X-ray flares

Journal of Atmospheric and Solar-Terrestrial Physics, 2008
Abstract Statistical analysis of data over a long period (1975–2005) shows that the magnitude and other characteristics of Forbush effects (for cosmic rays of 10 GV) are correlated with the power and longitude of the associated solar flares. These relations were obtained by using long-term observations of X-ray flares onboard GOES satellites, solar ...
A.V. Belov, E.A. Eroshenko, V.A. Oleneva, V.G. Yanke   +3 more
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DATABASE OF INTERPLANETARY DISTURBANCES AND FORBUSH EFFECTS

Proceedings of the XVIII Conference of Young Scientists “Interaction of fields and radiation with matter”
A new interface, accessible to any internet user, was developed for accessing the database of Forbush-effects and Interplanetary Disturbances (FEID). Catalogue of cosmic-ray events has been constantly worked on by the IZMIRAN group over the last decades and currently includes more than 8700 events, starting from the year 1954, with a solar source ...
S.M. Belov, A.V. Belov, N. S. Shlyk, M.A. Abunina   +3 more
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The effect of gradient and curvature drifts on Forbush decreases

Solar Physics, 1996
The average profile of Forbush decreases, produced by eastern-, central- and western-region solar flares is obtained separately by superposed epoch analysis for the periods 1966–1969 (qA 0). It is observed that the recovery of an average Forbush decrease from the maximum depression level is faster for the situation qA > 0 than for the situation qA ...
D. S. Rana, N. K. Sharma, R. S. Yadav
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Forbush decrease effects on radiation dose received on-board aeroplanes

Radiation Protection Dosimetry, 2005
Doses received on-board aeroplanes during deep Forbush decreases (FDs) have been recently measured and published. Using an operational model of dose calculation, the effects on aviation dose of the FDs observed from 1981 to 2003 using neutron monitors are studied and a simplified method to estimate dose variations from galactic cosmic ray variations ...
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Vector anisotropy of cosmic rays in the beginning of Forbush effects

Geomagnetism and Aeronomy, 2017
We consider the behavior of anisotropy and density of galactic cosmic rays in the first hours of Forbush effects from 1957 to 2014 initiated by the arrival of a shock wave. It has been shown that, as early as the event commencement, the first harmonic of anisotropy tends to increase substantially and its direction changes significantly.
A. V. Belov, M. A. Abunina, A. A. Abunin, E. A. Eroshenko, V. A. Oleneva, V. G. Yanke   +5 more
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Analyzing the June 2015 Forbush effect by the spectrographic global survey

Bulletin of the Russian Academy of Sciences: Physics, 2017
The June 2015 Forbush effect is studied using ground-based measurement data on cosmic rays (CRs), obtained from the worldwide network of stations by the spectrographic global survey. When approximating the variation spectra via the exponential function of particle rigidity in the 10–50 GV range, the spectrum index is higher at the phase of maximum ...
M. V. Kravtsova, V. E. Sdobnov
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Long-Term Changes in the Number and Magnitude of Forbush-Effects

Geomagnetism and Aeronomy, 2018
The IZMIRAN database of Forbush effects and interplanetary disturbances has been used to study long-term changes in the number and magnitude of Forbush effects in the last six solar cycles (1957–2016) for cosmic rays of rigidity of 10 GV. Solar activity cycles have been shown to be well expressed in data of Forbush effects, especially in large ...
A. A. Melkumyan, A. V. Belov, M. A. Abunina, A. A. Abunin, E. A. Eroshenko, V. A. Oleneva, V. G. Yanke   +6 more
openaire   +1 more source