Astrophysics (index)about

1947 Sunspot

(largest sunspot ever recorded)

A 1947 Sunspot in March and April was the largest ever recorded, going back to the 1700s. The year had a number of Geomagnetic Storms.


(solar,magnetism,event)
http://en.wikipedia.org/wiki/Solar_cycle_18
http://adsabs.harvard.edu/full/1947PASP...59..109H
http://www.eaas.co.uk/news/solar_features.html

index