Spotless Sun
All the indicators are that the Landscheidt minimum is here and that this is going to be close to a Dalton minimum.
2010/12/20 8:00 Five Days in a row spotless is achieved 12 months after solar cycle 24 began it’s ramp up.
A Dalton Minimum Repeat is Shaping Up
The Dalton Minimum was a period of low solar activity, named after the English meteorologist John Dalton, lasting from about 1790 to 1830. Like the Maunder Minimum and Spörer Minimum, the Dalton Minimum coincided with a period of lower-than-average global temperatures. The Oberlach Station in Germany, for example, experienced a 2.0°C decline over 20 years. The Year Without a Summer, in 1816, also occurred during the Dalton Minimum. Solar cycles 5 and 6, as shown below, were greatly reduced in amplitude.
http://solarcycle24.com/sunspots.htm
Sunspot number till December 7th
http://www.landscheidt.info/images/sc5_sc24.png
SC5 - SC24 comparison - http://www.landscheidt.info/images/sc5_sc24.png
To compare solar cycles we can also use the F10.7 radio flux values that have been recorded since 1947 in Canada. Solar cycle 20 was a weak cycle which is currently looking strong against solar cycle 24. Data is taken from the AU adjusted monthly average values.
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