Results 191 to 200 of about 13,257 (238)

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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The Evolution Characteristics of Geomagnetic Disturbances During Geomagnetic Storm

Chinese Journal of Geophysics, 2007
AbstractWith the data of the geomagnetic meridian observatories in China, 25 geomagnetic storms in the period of 1997 to 1999 have been analyzed by using three kinds of methods which are the method of Natural Orthogonal Components (NOC), Correlation analysis and Fourier analysis. Three steps have been adopted to decompose the storm‐time variation (Dst)
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Geomagnetic disturbance effects on equatorial spreadF

Proceedings / Indian Academy of Sciences, 1978
Geomagnetic disturbance effects on the occurrence of range and frequency spread at Huancayo are studied for the period 1957–74. The occurrence of frequency spread is decreased on disturbed days forD-months andE-months while duringJ-months an increase is noted in the post-midnight period.
R G Rastogi, G D Vyas, H Chandra
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Atmospheric temperatures and geomagnetic disturbances

Journal of Geophysical Research, 1967
Although the mechanisms relating atmospheric heating and geomagnetic disturbances still need to be clarified, their positive correlation has been confirmed. In a recent paper Jacchia et al. [1967] reported values for the temperature coefficient, ΔT/ΔKp at high latitudes that were 15–25% greater than at low latitudes for Kpmax 5.
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Geomagnetic disturbances and complex sunspots

Astrophysics and Space Science, 1975
Statistical result shows that a large geomagnetic disturbance is most likely to occur at the time when a complex sunspot is in 6.7° E-19.9° E from the central meridian of the solar disk during the period 1968–1972.
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On ionospheric disturbances in relation to geomagnetic disturbances

Geofisica pura e applicata, 1958
Disturbances in the critical frequency of theF2-region of the ionosphere at Watheroo on international magnetically disturbed days are analyzed together with simultaneous geomagnetic data at the same station. The results show that the daily average disturbanceDm (foF2) becomes negative or positive according as the maximum of the disturbance daily ...
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SURFACE-PRESSURE VARIATIONS FOLLOWING GEOMAGNETICALLY DISTURBED AND GEOMAGNETICALLY QUIET DAYS

Journal of Meteorology, 1952
Abstract The average surface-pressure variations after geomagnetically disturbed and geomagnetically quiet days are studied at various locations in a network covering the northern hemisphere between 30 and 70°N. For the same location and the same period of time, a marked negative correlation between the two average variations exists.
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