Comparing the March 1989 Sunspot Group with Other Great Groups of the Past
Volume 18 number 1 (1989)
- Peter O. Taylor
- P. O. Box 8115,
Abstract
A large sunspot group transited the Sun's disk during March 1989. The cluster is compared according to size, appearance and intensity of related geomagnetic storm conditions with other groups which have exhibited maximum areas greater than 3000 millionths solar hemisphere.