Yet when the sun emits the most energy, that is, when sunspots are most numerous, the earth's surface is coolest.
That seems to be what happens on a large scale when sunspots are numerous.
The net result is that when sunspots are numerous the earth's storminess increases, and the atmosphere is thrown into commotion.
As to the number of sunspots, there is little evidence previous to about 1750.
Third, the sunspots are only a partial and imperfect measure of the activity of the sun's atmosphere.
The official explanation, issued by the stations themselves, was sunspots.
The result of the comparison of earthquakes and sunspots is shown in Table 7.
sunspots do not offer us examples of motions of this order of rapidity, but the areas which they affect are not less astonishing.
In Wympland you get all the advantages of the sun and none of the drawbacks,—no sunblinds or sunstrokes or sunspots!
Longer periods of observation will permit comparisons that may yet define concurrent cycles of sunspots and weather.
Any of the dark, irregular spots that usually appear in groups on the surface of the Sun (its photosphere), lasting from a few days to several weeks or more. Sunspots appear dark because they are cooler, by up to 1,500°K, than the surrounding photosphere. They are associated with strong magnetic fields and solar magnetic storms moving in a vortex pattern, similar to a tornado on Earth. The number of sunspots waxes and wanes over an 11-year period; at maximum activity there are often increased numbers of solar flares.
Note: The number of sunspots goes through a maximum and minimum about every eleven years. During periods of maximum sunspots, the elementary particles associated with the spots cause disturbances in the atmosphere of the Earth and interfere with radio and television communication.