Origin of sunspot
Examples from the Web for sunspots
Historical Examples of sunspots
That seems to be what happens on a large scale when sunspots are numerous.
As to the number of sunspots, there is little evidence previous to about 1750.
The result of the comparison of earthquakes and sunspots is shown in Table 7.
The official explanation, issued by the stations themselves, was sunspots.Earth Alert!
In Wympland you get all the advantages of the sun and none of the drawbacks,—no sunblinds or sunstrokes or sunspots!The Other Side of the Sun