On the occurrence rate of high-speed solar wind events

Details On the occurrence rate of high-speed solar wind events On the occurrence rate of high-speed solar wind events

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994soph..155..401v&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 155, no. 2, p. 401-404

Physics

8

Coronal Holes, Solar Cycles, Solar Wind Velocity, Stellar Mass Ejection, Power Spectra, Solar Magnetic Field, Space-Time Functions, Spectrum Analysis

Scientific paper

We have investigated the rate of occurrence of solar wind phenomena observed between 1972-1984 using power-spectrum analysis. The data have been taken from the high-speed solar wind (HSSW) stream catalog published by Mavromichalaki, Vassilaki, and Marmatsouri (1988). The power-spectrum analysis of HSSW events indicates that HSSW stream events have a periodicity of 9 days. This periodicity of HSSW events is 1/3 of the 27-day period of coronal holes, which are major sources of solar wind events. In our opinion, the 9-day period may be the energy build-up time for coronal hole regions to produce the HSSW stream events.

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