Summary
Using a more detailed geomagnetic activity Kp index, the finding in [3] that geomagnetic activity increases after the CMP of coronal holes, was verified; it was shown using individual activity patterns, that coronal holes apparently do not form a homogeneous class of phenomena, which must be respect in considerations of emissions of fast solar wind streams.
Similar content being viewed by others
References
R. H. Munro, G. L. Withbroe: Properties of a Coronal Hole from EUV Observations. Astrophys. J., 176 (1972), 511.
A. S. Krieger et al.: A Coronal Hole and Its Identification as the Source of a High Velocity Solar Wind Stream. Solar Phys., 29 (1973), 505.
W. M. Neupert, V. Pizzo: Solar Coronal Holes as Sources of Recurrent Geomagnetic Disturbances. J. Geoph. Res., 79 (1974), 3701.
M. D. Altschuler et al.: Coronal Holes. Solar Phys., 26 (1972), 354.
A. J. Hundhausen: Coronal Expansion and Solar Wind. Springer, New York 1972, 162.
B. Bednářová-Nováková, J. Halenka: Results of Investigating the Relations between Solar and Geomagnetic Activity Obtained at the Geophysical Institute, CSAS. Travaux Inst. Géophys. Acad. Tchécosl. Sci. No 424, Geofysikální sborník 1974, Academia, Praha 1976.
J. Halenka: A Detailed Co-ordination of Geomagnetic Activity with Central Solar Situations During February, March and April 1972. Travaux Inst. Géophys. Acad. Tchécosl. Sci. No 440, Geofysikální sborník 1975, Academia, Praha 1977.
J. Halenka: Detailed Co-ordination of Geomagnetic Activity with Central Solar Situations During the Months of May, June and July 1972. Travaux Inst. Géophys. Acad. Tchécosl. Sci. No 465, Geofysikální sborník 1976, Academia, Praha (in print).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Halenka, J. On the question of coronal holes as sources of geomagnetic disturbances. Stud Geophys Geod 21, 365–370 (1977). https://doi.org/10.1007/BF01613269
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF01613269