4.7 Solar, Planetary and Geomagnetic Activity Indices
4.7.1 Geomagnetic Planetary Indices Provided by : Institut fur Geophysik, FRG from Aug., 1986 onward 4.7.2 Planetary Magnetic Three-hour-Range Indices Kp (after Bartels) Provided by : Institut fur Geophysik, FRG from May, 1986 onward (Digital Data Base from 1971, onward) 4.7.3 Daily Geomagnetic Character Figures C9 and 3-Day Mean Sunspot Numbers R9 (after Bartels) Provided by : Institut fur Geophysik, FRG from Dec., 1986 onward 4.7.4 aa indices, International Quiet and Disturbed Days, Preliminary Report on Rapid Variations and Hourly Equatorial Dst Values (IAGA Monthly Bulletin) Provided by : Royal Netherlands Meteorological Institute, The Netherlands from Jun., 1986 onward 4.7.5 Provisional Sunspot Numbers Provided by : Sunspot Index Data Center (WDC-C1), Belgium from Dec., 1986 onward 4.7.6 RI Definitive Sunspot Numbers Provided by : Sunspot Index Data Center (WDC-C1), Belgium from Jan.1, 1983 onward 4.7.7. Provisional Hourly Values of Equatorial DST Provided by : WDC for Geomagnetism, Kyoto University from Jan.1, 1992 onward