Solar Max
solar max... :)
11 years
came across the surprising fact that between 1645 and 1715 there was virtually no sunspot activity at all.
We do not yet have a good understanding of the way that sunspot activity changes. We've only been keeping track of sunspots since the early 1600s. In general, sunspot activity increases and decreases in a cycle that is approximately 11 years long. But the cycle isn't particularly stable; for example, the previous cycle, Solar Cycle 23, lasted for closer to 13 years and the current Solar Cycle 24 has been fairly low in activity. This may have long-term significance in our weather here on Earth; twice in the last 4 centuries, we've seen extended periods of very low sunspot activity, and both periods have been associated with unusually cold weather. Some scientists fear that the current sunspot deficit may be a prelude to a new period of cooler-than-normal weather.
low sunspot activity
Probably so, and it still does today. We don't know the reason for the connection, but the weather is typically colder during times when the sunspot number is low for long periods. There have been two multi-decade long periods of very low sunspot activity, the Maunder Minimum and the Dalton Minimum. Each is associated with extended periods of unusually cold weather.
The cycle of sunspot activity.
Sunspot activity has been a common occurence now with today's technology being able to detect the sun's activity at a moment's notice. NASA and Space Weather are some examples of online sites that allow common folks like us to be able to view sunspot activity at the comfort of our homes.
The cycle of sunspot activity.
Sunspot activity increases and decreases with a frequency of about eleven years from peak to peak, so there are about five and a half years from a period of highest sunspot activity to a period of lowest sunspot activity. The last peak was in 2001, so the next peak is expected in 2012.
every eleven years lol
No, sunspot activity increases and decreases. Scientists have observed that the level of sunspot activity follows a cycle of about 11 years (11 years from maximum to maximum and 11 years from minimum to minimum).