Results 191 to 200 of about 13,189 (224)

Long-term dynamics of placozoan culture: emerging models for population and space biology. [PDF]

Front Cell Dev Biol
Romanova DY, Povernov AA, Nikitin MA, Borman SI, Frank YA, Moroz LL.   +5 more
europepmc   +1 more source

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GEOMAGNETICALLY INDUCED CURRENTS CALCULATION DURING GEOMAGNETIC DISTURBANCES

POWER ENGINEERING: economics, technique, ecology, 2016
A new method is presented to calculate geo-electric field using uniform Earth structure model for defining surface potential between grounded neutral of grid power transformers. It was calculated geo-electric field applying direct and inverse Fourier transform and calculated a surface impedance as a function of frequency of magnetic field oscillation ...
Kyryk, Valerii Valentynovych, Nahornyi, Roman Vladyslavovych   +1 more
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Aurora and Geomagnetic Disturbance

Nature, 1939
IN the course of analysis of simultaneous auroral and geomagnetic events at Fort Rae, North West Canada, during the Second International Polar Year, a feature has emerged about which we consider it advisable to make a preliminary report. If the elevation above the horizon of an auroral arc be φ, and if θ be the elevation of a concentrated linear ...
J. M. STAGG, J. PATON
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Solar activity and geomagnetic disturbances

Geomagnetism and Aeronomy, 2013
An analysis of IZNIRAN magnetic observatory data indicated that geomagnetic storms with sudden and gradual commencements form two independent populations with respect to the disturbance occurrence time and character because the solar sources of these disturbances are different.
V. N. Obridko, Kh. D. Kanonidi, T. A. Mitrofanova, B. D. Shelting   +3 more
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Geomagnetic Disturbance and the Troposphere

Nature, 1969
THERE have been many searches for a possible influence of solar or magnetic disturbance on the troposphere, either for a direct effect or for one operating indirectly through propagation downwards from the upper to the lower atmosphere. Due to the many complex and variable factors involved, it has not proved easy to establish any clear-cut evidence for
W. J. G. BEYNON, E. H. WINSTANLEY
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Polar geomagnetic disturbances

Planetary and Space Science, 1963
Results of recent observations of geomagnetic disturbances in both northern and southern high latitudes are critically reviewed, and various theories on these phenomena are introduced. In Section 1, an additional geomagnetic daily variation, observed in the polar areas on magnetically quiet days, is discussed.
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Atmospheric Pressure and Geomagnetic Disturbance

Nature, 1952
IN seeking for possible relationships between geomagnetism and atmospheric pressure, J. M. Stagg1 compared the mean diurnal pressure variation at Aberdeen on magnetically quiet days with that on magnetically disturbed days (five of each type per month) over the seven years 1922–28.
R. P. WALDO LEWIS, D. H. McINTOSH
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Ensemble forecasting model for geomagnetic disturbance

Proceedings of 2011 International Conference on Electronics and Optoelectronics, 2011
Ensemble forecasting has been shown to offer a systematic improvement in the skill of weather and climate prediction with different models. However, little such work has been done for space weather prediction. Referring to the ensemble forecasting technique in weather prediction, a novel geomagnetic disturbance ensemble forecasting (GDEF) model is ...
null Xie YanQiong, null Zhang Jun, null Han XianHua   +2 more
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Equatorial coronal arches and geomagnetic disturbance

Solar Physics, 1972
Central-meridian passage of coronal equatorial arches is followed, statistically, after about 7 days by geomagnetic disturbance. Sector-boundary crossings at Earth are most likely to occur 5 days after arch CMP, while metric noise sources cluster at the location of the arches.
C. Sawyer, Shirley F. Hansen
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Influence of sunspots on geomagnetic disturbance

Journal of Geophysical Research, 1961
The hypothesis that the ejection of solar corpuscles is influenced by interactions of ‘active region’ magnetic fields is tested empirically. The results do not support the hypothesis.
Fred Ward, Ralph Shapiro
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