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sunspots
sunspot cycle
sunspot cycle The variation in the number of sunspots and other forms of solar activity with an average period of about 11 years. In each successive cycle the north and south magnetic polarities of the Sun are reversed, so that there is a 22-year magnetic cycle. The monthly averages of
relative sunspot numbers are around 6 in years of sunspot minimum and 116 at sunspot maximum. Not only sunspot number varies, but also the numbers of
active regions and
flares, and the level of ultraviolet, radio, and other emission associated with such regions. The 11-year periodicity is thought to arise through the action of the
solar dynamo. The sunspot cycle may not always have operated in its present observed form, as suggested by the existence of the
Maunder minimum.
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Sunspots revealed in striking detail by supercomputers.
Newspaper article from: NewsRx Health & Science; 7/12/2009; 700+ words
; ...comprehensive computer model of sunspots. The resulting visuals...resolution simulations of sunspot pairs open the way for...the Sun's surface. Sunspots are associated with...a model of an entire sunspot," says lead author...have to understand how sunspots emerge and evolve...
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FIRST LOOK INSIDE SUNSPOT REVEALS VORTEXES
News Wire article from: United Press International; 11/6/2001; 684 words
; ...First look inside sunspot reveals vortexes...the origin of sunspots -- shadowy planet...workings of a sunspot. Their study reveals sunspots are giant vortexes...core, leaving sunspots cool and dark...together, keeping a sunspot's magnetic...
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New Sunspots "Stickers" For Monitoring UVB Sun Exposure Headed For Retail Outlets Merger Agreement Raises Capital for Marketing Campaign.
Business Wire; 2/6/2001; 700+ words
; ...BUSINESS WIRE)--Feb. 6, 2001 Sunspots, Inc. a Seattle area based manufacturer and distributor of SunSpots(R), a small circular "sticker...further research and development of Sunspots. Upon completion of the merger agreement...
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The Link Between Sunspots and Earth's Warming.(Max Planck Institute for Solar System Research)
Magazine article from: World and I; 9/1/2004; 700+ words
; ...were hardly any sunspots at all. The German...development of the sunspot number from before...with the number of sunspots. A comparison of...historical records of sunspot numbers reveals...the reconstructed sunspot numbers extend back...substantially fewer sunspots than now, ...
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SCIENTISTS GINGERLY LINK SUNSPOT CYCLE TO WEATHER SKEPTICS SCOFF AT CORRELATION WITH POLAR WARM SPELLS
Newspaper article from: The Boston Globe; 12/14/1987; ; 700+ words
; ...specific direction and sunspot activity on the...understanding of how sunspots actually affect...near its peak. Sunspots, which extend thousands...photographs. When sunspot activity is at its...the cycle of solar sunspots and nothing has...to establish this sunspot-weather ...
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Sunspots May Hit 200-Year Peak, Play Havoc With Communications
Newspaper article from: The Washington Post; 8/27/1988; ; 700+ words
; ...the average number of sunspots during a 13-month...the average is 51.3 sunspots. During the same period...1957, the greatest sunspot cycle ever previously...systematic and accurate. Sunspots were first observed...connections between sunspot cycles and earthly phenomena...
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 "The Star (South Africa)")
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Sunspots are a reminder of our power to choose.(Business Report)
Newspaper article from: The Star (South Africa); 10/14/2008; 700+ words
; ...better understand sunspots. Back in 1884...link between sunspot cycles and business...connection between sunspots and the weather. While the sunspot theory of the...vice versa. So sunspots might be truly...Shell showed that sunspot equilibrium is...
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Sunspots and the weather
Newspaper article from: Bangor Daily News Bangor, ME; 6/29/2009; ; 700+ words
; ...1645 to 1715 almost no sunspots were seen. This quiet...between the lack of sunspot activity and the cooler...active enough to produce sunspots, its heliosphere expands...radiation - meaning fewer sunspots - the climate also might...summer is that the 23rd sunspot cycle should have ...
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NEW RESEARCH MAY IMPROVE SUNSPOT FORECASTS
Magazine article from: Bulletin of the American Meteorological Society; 8/1/2004; ; 700+ words
; ...transport imprints of sunspots that occurred over the previous two sunspot cycles. By analyzing...eventually to forecast sunspot activity about two solar...sort of conveyor belt of sunspots. The sunspot process begins with tightly...
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Breakthrough Research to Improve Forecasts of Sunspot Cycles.
News Wire article from: Ascribe Higher Education News Service; 5/31/2004; 700+ words
; ...transport imprints of sunspots that occurred over the previous two sunspot cycles. By analyzing...sort of conveyor belt of sunspots. The sunspot process begins with tightly...latitudes and form bipolar sunspots, which are regions of...
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Solar Sunspot Cycle
Book article from: World of Earth Science
...terrestrial standard, sunspot regions are cooler that...surrounding solar surface. Sunspots occur in cycles and...specific mention of sunspots in modern scientific...published in 1610. Sunspot occurrence has been...that the frequency of sunspots varies with a period...
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solar activity and sunspots
Book article from: The Oxford Companion to the Earth
...solar equator. Sunspots are typically measured...the Wolf Relative Sunspot Number. This is...instrumental record of sunspot cycles now extends...It includes 22 sunspots cycles, and indicates...is the number of sunspots. The fact that...with increasing sunspot numbers suggests...
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Sunspots
Encyclopedia entry from: The Gale Encyclopedia of Science
Sunspots Sunspots are relatively dark...x2212; 1642). Sunspot activity —...near its minimum in sunspot activity, with...solar cycle, a few sunspots appear at the higher...high latitudes. Sunspots, which usually...this same manner, sunspot pairs possess a...
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sunspots
Book article from: The Columbia Encyclopedia, Sixth Edition
...constituting a sunspot results from the...magnetic field. Sunspots appear usually...associated with sunspots. Sunspot activity produces...an increase in sunspots is observed are...Maunder noticed that sunspot counts fell drastically...
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relative sunspot number
Book article from: A Dictionary of Astronomy
relative sunspot number (symbol R ) A measure of the number...individual spots ( f ) and the number of sunspot groups ( g ), plus a factor k that represents...telescope: R = k (10 g + f ). The Wolf sunspot number refers to Wolf's initial observations...
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