Results 141 to 150 of about 508 (177)

An Anomalous Forbush Decrease

Publications of the Astronomical Society of Australia, 1968
Ground level detectors observed several major changes in the primary cosmic-ray flux during November 4960. Large increases, of solar origin, occurred on November 12 and 15, and a smaller one on November 20. The galactic flux in the region of the Earth was severely reduced by a Forbush decrease on November 12, and remained notably depressed until ...
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Forbush decreases in the cosmic radiation

Space Science Reviews, 1971
The experimental observations of Forbush decreases in recent years are reviewed and related to different theoretical models which have been proposed. The observational data from both ground-based and spacecraft experiments were selected to illustrate the important characteristics of Forbush decreases.
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Observing Forbush decreases in cloud atShetland

Journal of Atmospheric and Solar-Terrestrial Physics, 2010
Abstract Meteorological measurements from Lerwick Observatory, Shetland (60°09′N, 1°08′W), are compared with short-term changes in Climax neutron counter cosmic ray measurements. For transient neutron count reductions of 10–12%, broken cloud becomes at least 10% more frequent on the neutron minimum day, above expectations from sampling. This suggests
R. Giles Harrison, Maarten H.P. Ambaum
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Forbush decreases and interplanetary disturbances

Il Nuovo Cimento B, 1973
The correlation between perturbations of the interplanetary medium and Forbush decrease events is studied by using interplanetary-magnetic-field and cosmic-ray data for the period March to November 1968, with the purpose of investigating the particular mechanism responsible for this type of modulation of the cosmic-ray intensity.
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What determines the magnitude of forbush decreases?

Advances in Space Research, 2001
Abstract Cosmic ray Forbush effects (FEs) have been studied for more than 60 years, but even today this phenomenon has no universally accepted definition, which leads to misunderstanding among researchers. There are no complete and convincing answers to the following questions: What are the distinctive features of FEs?
A.V. Belov, E.A. Eroshenko, V.A. Oleneva, A.B. Struminsky, V.G. Yanke   +4 more
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Forbush decreases and geomagnetic storms

Geomagnetizm i aèronomiâ
Forbush decreases in galactic cosmic rays (according to data from a network of neutron monitors) and accompanying geomagnetic disturbances over a long period from 1957 to 2022 have been identified and studied. Statistical relationships between various parameters of cosmic ray flux and geomagnetic activity indices are analyzed.
A. V. Belov, E. A. Belova, N. S. Shlyk, M. A. Abunina, A. A. Abunin, S. M. Belov   +5 more
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Types of interplanetary shocks and forbush decreases

Solar Physics, 1991
Two types of interplanetary shocks have been identified and classified into two groups, those associated with a helium-enhancement and those not associated with any helium-enhancement. The cosmic-ray intensity decreases at Calgary neutron monitor are studied with respect to the arrival time of the two groups of shocks.
null Badruddin, D. Venkatesan, A. G. Ananth   +2 more
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Latitude-dependence of a forbush type decrease

Il Nuovo Cimento, 1961
Latitude-dependence of a cosmic ray intensity decrease has been found. It has been shown that the relative amplitude does not flatten beyond the latitude knee. It, rather, goes on increasing even much beyond the knee. It is also seen that the relative amplitude is not symmetrical around the geomagnetic equator.
Lekh Vir, P. S. Gill
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Forbush Decreases and Cloud Cover

2005
According to the cosmic ray cloud hypothesis, changes in the cosmic ray intensity over the past two and a half solar cycles caused significant changes in the Earth's cloud cover with important consequences for the climate. To test this hypothesis we investigated on a global scale the atmospheric cloud cover and the variation of the atmospheric ...
Čalogović, Jaša, Beer, Jürg, Desorgher, Laurent, Flückiger, Erwin   +3 more
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Forbush decreases registered onboard aircraft

Advances in Space Research, 2005
Abstract Forbush decreases have been registered onboard aircraft; an important dropdown of the aircraft crew exposure was stated. Particularly important effect of that kind was registered during the period of disturbed solar conditions at the end of October 2003, it was, however, already registered during 2001 year.
F. Spurný, K. Kudela, T. Dachev
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