Magnetic activity and solar wind velocity at and preceding solar minimum for the past 500 years

Details Magnetic activity and solar wind velocity at and preceding solar minimum for the past 500 years Magnetic activity and solar wind velocity at and preceding solar minimum for the past 500 years

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9110157s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Sept. 1, 1986, p. 10157-10161.

Other

10

Solar Activity, Solar Magnetic Field, Solar Wind Velocity, Sunspot Cycle, Auroras, Coronal Holes, Interplanetary Magnetic Fields, Solar Planetary Interactions

Scientific paper

The magnetic activity and solar wind speed at and preceding sunspot minimum has been estimated for the past five centuries. Observed and estimated sunspot numbers for the period 1500-1976 were used in the calculations. The estimated magnetic activity was much more sensitive than the solar wind speeds to the prolonged solar-activity minima around the beginnings of the 18th and 19th centuries. The aa index varied from about 3-5 during these solar-activity minima to 27 for the period around 1954. The solar-wind speed, on the other hand, varied only between 300 and 600 km/s over the five-century period.

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