Dependence of the aurora borealis occurrences on the solar-terrestrial parameters

Details Dependence of the aurora borealis occurrences on the solar-terrestrial parameters Dependence of the aurora borealis occurrences on the solar-terrestrial parameters

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986em%26p...34...65l&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 34, Jan. 1986, p. 65-75. UNESCO-supported research.

Computer Science

3

Auroras, Solar Activity, Solar Terrestrial Interactions, Correlation, Geomagnetism, Magnetic Disturbances, Solar Corona, Solar Flares, Spectrum Analysis, Sunspots

Scientific paper

The recent measurements made by satellites of the aurorae in connection with solar phenomena have increased interest in auroral research. In the present investigation, it is established that, for the 20th solar cycle, the occurrence of visual discrete aurorae A, deduced from a complete set of data, is significantly related to the sunspot numbers Rz, the number of flares F (of importance greater than or equal to 1) the solar wind streams derived from solar coronal holes H, and the geomagnetic index Ap. By employing the theory of residues it has been found that A correlates significantly well with the above indices. Accuracies of the order of 75-94 percent were found for geomagnetic latitudes in the range of 54-63 deg N. The A-R(z) relationship was investigated in particular for the period 1897-1951. For this period spectrum analysis of A annual values revealed the existence of 3-4 yr and 8-10 yr periodicities of significances 95 percent and 99 percent respectively.

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