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Individual sunspots can appear and disappear in a single day, or even in just a few hours. On the other hand, some sunspots that disappear as the Sun spins will re-appear 15 days later when the spot becomes visible again.
The "sunspot cycle" is typically about 11 years long from peak to peak, but the pattern isn't especially constant. Some cycles take as little as 8 to 9 years, while some stretch out for 15-17 years.
What else can I help you with?
How many years is the sunspot cycle?
The sunspot cycle is about 11 years in length.
How many years pass between a year of where there are many sunspots to the next period of lower amounts of sunspots?
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.
What is is the sunspot cycle?
http://en.wikipedia.org/wiki/Sunspot_cycle The definition for sunspot cycle is "the recurring increase and decrease in the number of sunspots over a period averaging about eleven years."
What is the average sunspot cycle in years?
The average sunspot cycle is approximately 11 years, with periods of high sunspot activity followed by lower activity levels. This cycle is known as the solar cycle or the sunspot cycle.
How much time passes between two successive sunspot minima?
The average time between two successive sunspot minima is around 11 years, known as a solar cycle. This period is characterized by a decrease and increase in sunspot activity. However, the length of each solar cycle can vary, ranging from around 9 to 14 years.
What are sunspot maximums and sunspot minimums?
Sunspot maximum and sunspot minimum are the points in time (roughly 6 years apart) when the sun is producing the most, or the least sunspots. In the past this has been measured both by sunspot area and sunspot count and is directly tied to the solar magnetic cycle.
How often does the sunspot cycle repeat itself?
The sunspot cycle typically repeats approximately every 11 years, though the length can vary from about 9 to 14 years. This cycle is characterized by the waxing and waning of sunspot activity on the Sun's surface.
What is the number of years between periods of sunspot activity?
11 years
What is the name of the duration relating to the rise and fall of the number of sunspots on the Sun?
It is often referred t as The Sunspot Cycle - period of about 11 years.
How long is the sunspot cycle?
11 years in average.
The duration of the sunspot cycle is approximately?
Every 11 years. The entire solar magnetic cycle takes about 22 years; twice in this cycle there is a sunspot maximum.
When was the last sunspot maximum?
The last Solar Maximum was in 2002. The Sun is currently at the minimum of the sunspot cycle, perhaps just at the beginning of the new Cycle 24. So far, the Sunspot Number for February is Zero - no sunspots at all this month so far (as of February 8, 2009). You can check the sunspot number, and see fascinating things about things in space each day at www.spaceweather.com. It is currently focusing on photos of Comet Lulin, the Green Comet. _________________________________ The problem with WikiAnswers is that if you ask a question that is time-related, such as "When was the last sunspot maximum?", the answer becomes less and less useful as time goes by. The answer above was from February, 2009; today is April 10, 2014, five years later. The "last sunspot maximum" answer now would be "last month", since we're at or near the Solar Max. It's been a long time coming; the last solar cycle dawdled for a year longer than it should have, and this cycle looks like it's going to be well below the average of previous solar cycles. But the spaceweather.com website, linked below, is still the best resource for questions like this.
