Date: 2009-10-26 18:17:29Astrophysics Plasma physics Geomagnetism Planetary science Light sources Coronal mass ejection Space weather Geomagnetic storm Aurora Physics Space plasmas Astronomy | | GLOSSARY OF SOLAR-TERRESTRIAL TERMS A a index. See Ak index. aa index. A daily and half-daily index of geomagnetic activity determined from the k indices scaled at two nearly antipodal stations at invariant magnetic latiAdd to Reading ListSource URL: www.swpc.noaa.govDownload Document from Source Website File Size: 108,21 KBShare Document on Facebook
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