Some properties of the Svalgaard A/C index

Details Some properties of the Svalgaard A/C index Some properties of the Svalgaard A/C index

Apr 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.1349r&link_type=abstract

Journal of Geophysical Research, vol. 80, Apr. 1, 1975, p. 1349-1351.

Other

6

Annual Variations, Geomagnetism, Indexes (Ratios), Interplanetary Magnetic Fields, Magnetic Variations, Polar Caps, Long Term Effects, Magnetic Effects, Secular Variations, Solar Cycles

Scientific paper

Several properties of the A/C index of polar cap variations introduced by L. Svalgaard in 1972 have been found to vary with time. In the presatellite era, C days, as measured by the Ap index, are almost twice as geomagnetically active as A days, while in the modern epoch they have essentially identical activity. Prior to 1962 there were over 40% more A days than C days per year, while during the modern epoch there are essentially equal numbers of A days and C days. In view of this strong bias to assigning a 'toward' classification on geomagnetically active days it is recommended that the Svalgaard A/C classification not be used in studies of geomagnetic activity. It is also recommended that a full and thorough documentation of the index be prepared and/or that others undertake to compile such a classification separately.

Affiliated with

Also associated with

No associations

Rating

Some properties of the Svalgaard A/C index does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Some properties of the Svalgaard A/C index, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Some properties of the Svalgaard A/C index will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-948535