Solar cycle

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The solar cycle, or the solar magnetic activity cycle, is the main source of periodic solar variation driving variations in space weather. The cycle is observed by counting the frequency and placement of sunspots visible on the Sun. Powered by a hydromagnetic dynamo process driven by the inductive action of internal solar flows, the solar cycle:

For more information about Solar cycle, read the full article at Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.


News tagged with solar cycle

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Are Sunspots Disappearing?

Are Sunspots Disappearing?

Space & Earth / Space Exploration

created Sep 03, 2009 | popularity 4.9 / 5 (23) | comments 15

The sun is in the pits of the deepest solar minimum in nearly a century. Weeks and sometimes whole months go by without even a single tiny sunspot. The quiet has dragged out for more than two years, prompting ...


Earth and the Sun

Study: Small fluctuations in solar activity, large influence on the climate

Space & Earth / Earth Sciences

created Aug 27, 2009 | popularity 4.7 / 5 (15) | comments 9

(PhysOrg.com) -- Subtle connections between the 11-year solar cycle, the stratosphere, and the tropical Pacific Ocean work in sync to generate periodic weather patterns that affect much of the globe, according ...


Sun

Solar Mystery Solved

Physics / General Physics

created Aug 26, 2009 | popularity 4.3 / 5 (19) | comments 8

(PhysOrg.com) -- Solar flares are amongst the most dangerous cosmic phenomena man has ever known. Though they pose no harm to humans, their effect on technology is vast. When they occur, they possess the capability ...


Solar cycle linked to global climate

Solar cycle linked to global climate

Space & Earth / Earth Sciences

created Jul 16, 2009 | popularity 4.7 / 5 (30) | comments 47

Establishing a key link between the solar cycle and global climate, research led by scientists at the National Science Foundation (NSF)-funded National Center for Atmospheric Research (NCAR) in Boulder, Colo., ...


Ulysses discovered that the magnetic fields of the sun spread their influence across the whole solar system

Scientists bid adieu to plucky solar probe

Space & Earth / Space Exploration

created Jun 30, 2009 | popularity 4.3 / 5 (4) | comments 1

US and European scientists were Tuesday bidding farewell to the tenacious solar probe Ulysses which has been recording data around the sun for more than 18 years, four times longer than planned.


Mystery of the Missing Sunspots, Solved?

Mystery of the Missing Sunspots, Solved?

Space & Earth / Space Exploration

created Jun 18, 2009 | popularity 4.7 / 5 (20) | comments 11

The sun is in the pits of a century-class solar minimum, and sunspots have been puzzlingly scarce for more than two years. Now, for the first time, solar physicists might understand why.


New Solar Cycle Prediction

New Solar Cycle Prediction

Space & Earth / Space Exploration

created Jun 01, 2009 | popularity 3.9 / 5 (19) | comments 16

(PhysOrg.com) -- An international panel of experts led by NOAA and sponsored by NASA has released a new prediction for the next solar cycle. Solar Cycle 24 will peak, they say, in May 2013 with a below-average ...


New Solar Cycle Prediction: Fewer Sunspots, But Not Necessarily Less Activity

New Solar Cycle Prediction: Fewer Sunspots, But Not Necessarily Less Activity

Space & Earth / Space Exploration

created May 27, 2009 | popularity 4.4 / 5 (15) | comments 5

(PhysOrg.com) -- An international panel of experts has released a new prediction for the next solar cycle, stating that Solar Cycle 24 will peak in May 2013 with a below-average number of sunspots. Led by ...


Warning: Sunspot cycle beginning to rise (AP)

Warning: Sunspot cycle beginning to rise

Space & Earth / Space Exploration

created May 08, 2009 | popularity 4 / 5 (44) | comments 10

(AP) -- When the sun sneezes it's Earth that gets sick. It's time for the sun to move into a busier period for sunspots, and while forecasters expect a relatively mild outbreak by historical standards, one ...


Current Image of Sun-April 26, 2009

Our Sun: A Little Slow On the Uptake for Cycle 24

Space & Earth / Astronomy

created Apr 27, 2009 | popularity 4.5 / 5 (28) | comments 26

A very recent article carried by the BBC called, 'Quiet Sun Baffling Astronomers' sent me in a twitter of research activity. The BBC article's head notes include "The Sun is the Dimmest It Has Been for Nearly ...


The Sun Shows Signs of Life

The Sun Shows Signs of Life

Space & Earth / Space Exploration

created Nov 10, 2008 | popularity 4.4 / 5 (28) | comments 1

After two-plus years of few sunspots, even fewer solar flares, and a generally eerie calm, the sun is finally showing signs of life. "I think solar minimum is behind us," says sunspot forecaster David Hathaway ...


What's Wrong with the Sun? (Nothing)

What's Wrong with the Sun? (Nothing)

Space & Earth / Space Exploration

created Jul 11, 2008 | popularity 3.8 / 5 (43) | comments 20

Stop the presses! The sun is behaving normally. So says NASA solar physicist David Hathaway. "There have been some reports lately that Solar Minimum is lasting longer than it should. That's not true. The ongoing ...