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The Suess cycle, or de Vries cycle, is a cycle present in radiocarbon proxies of solar activity with a period of about 210 years. It was named after Hans Eduard Suess and Hessel de Vries . [ 48 ] Despite calculated radioisotope production rates being well correlated with the 400-year sunspot record, there is little evidence of the Suess cycle ...
An example is the Meeus smoothing formula, [7] with related solar cycles characteristics available in this STCE news item. [8] The start of solar cycle 25 was declared by SIDC on September 15, 2020 as being in December 2019. [9] This makes cycle 24 the only "11-year solar cycle" to have lasted precisely 11 years.
The study of [sun spot] cycles was generally popular through the first half of the century. Governments had collected a lot of weather data to play with and inevitably people found correlations between sun spot cycles and select weather patterns. If rainfall in England didn't fit the cycle, maybe storminess in New England would.
Solar cycle 25 is the current solar cycle, ... After rotating to the visible hemisphere of the Sun, the regions of the sunspot complex were designated 2993 through ...
Since Hale's law states that the leading magnetic polarities in each hemisphere alternate between sunspot cycles, it takes two full cycles for the leading polarities to return to their original pattern. This indicates that the approximately 11-year sunspot cycle is one-half of a 22-year magnetic cycle, which is sometimes referred to as a Hale ...
Carrington and Gustav Spörer discovered that the Sun exhibits differential rotation, and that the outer layer must be fluid. [52] In 1907–08, George Ellery Hale uncovered the Sun's magnetic cycle and the magnetic nature of sunspots. Hale and his colleagues later deduced Hale's polarity laws that described its magnetic field.
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