sunspot

This east-west flow of plasma inside the sun normally indicates the onset of sunspot formation for the next solar cycle.

Just as a sunspot was turning away from Earth on Sept. 8, the active region erupted, producing a solar flare and a fantastic prominence.

Sunspot activity is correlated with the total amount of energy we receive from the sun.

The Sun is not considered a variable star, but it does undergo periodic changes in activity known as the sunspot cycle.

It was understood that sunspot activity was not at its peak in 1932 and hence the radio waves were unlikely to be emitted from the Sun.

Generally speaking, scientifically accepted records of sunspot activity do seem to be heading for a climax in the near future.

The irregular shapes that surround the sunspot are known as granulation and are made of hot gas rising from inside the Sun.

What is more, the researchers found a sort of sweet spot for their soundings, a depth where the sunspot signal is strongest.

Large sunspot group AR 9169 moved across the Sun during 2000 September and decayed in a few weeks.

If there is a sunspot region along one of these paths, the travel time will be a little bit shorter.

Pictured above in a specific color of light emitted by hydrogen is sunspot 10982, one of the first sunspots of the new solar cycle.

Right now the sun is in the most dormant phase (so-called solar minimum) of its 11-year sunspot cycle.

The scaled smoothed sunspot number is shown in red to indicate the phase of the solar activity cycle.

When sunspot numbers drop at the end of each 11-year cycle, solar storms die down and all becomes much calmer.

Recently, the sunspot activity is relatively low while the sun in a quiet period for extravehicular astronauts to walk.

Back in 2008 solar scientists saw a high-latitude, reversed-polarity sunspot, suggesting the start of a new solar cycle.

One of the outstanding questions facing solar physicists is the origin of the solar magnetic cycle: What drives the 11-year sunspot cycle?

He liked to observe the Sun whenever he could, and he discovered the sunspot cycle in this way.

In view of its physical nature such a sunspot group actually has a structure of its own.

As for those fierce solar storms, the next sunspot maximum will not happen until 2013, and will be on the mild side, astronomers now say.

Another thing that NASA has observed is that the sun literally reverses its poles every 11 years at the peak of each sunspot cycle.

Large sunspot group AR 9169 from the last solar cycle is visible as the bright area near the horizon.

However, there is also evidence that the sun is inexorably losing its ability to produce sunspots (see "The sunspot forecast" ).

Any changes in sunspot numbers reflect changes inside the sun.

Intriguingly, however, Dr Hill's studies indicate that the jet stream of a new cycle starts to form years before the sunspot pattern.

The research shows that there are high correlation and regularity between sunspot and runoff during the magnetic period.

Spicules fill the frame and are particularly evident converging on the sunspot in the lower right of the image.

Accurately predicting the intensity of the sunspot cycle, which occurs about every 11 years, allows scientists to anticipate solar storms.

The recent increase in sunspot number offers a hint of the coming solar maximum of its 11-year cycle.

This was noted on a NOAA chart, a sudden doubling of the sunspot count.

But sunspot numbers are running at less than half those seen during cycle peaks in the 20th Century.

The subsurface meridional flow plays an important role in the dynamics of the sunspot cycle.

One surprise is they've discovered wreath-like structures that may foreshadow a sunspot's emergence.

They also worked out that the latitude of this wind is related to the sunspot cycle.

In the old day, we only know there's sunspot on sun's surface. Now we know sunspots are sun's magnetic field.

Is there evidence for sunspot forcing of climate at multi- year and decadal periods ?

The grayish outer part of a sunspot.

Changes to the sunspot cycle will have an impact on our weather and climate--but not a very big one.

Giovanni Cassini, an Italian astronomer, described a sunspot that appeared in 1671 as the first he had seen for many years.

The darkest region of a sunspot.

It seems that the sunspot bonanza of last century is over.

Solar flares rise and fall on an 11-year cycle, so scientists thought sunspot activity would pick up some time in 2008.

Sunspot activity, which follows an 11-year cycle, is due to peak in 2013 after which it will start to wane slightly.

In May, a big sunspot seemed to augur a return to normal, but it faded away and sunspotless days returned.

He then correlated the reams of data he'd gathered with the 11-year sunspot cycle.

We observe three sunspot groups on the disc .

So with luck the sunspot riddle should be solved in 2010.

There is evidence that aspects of weather and climate are also synchronized with sunspot activity.

Only on one occasion did the sunspot number bounce back to record levels.

The quasi 11-year cycle of sunspot activities and torrential rain days in Fuxin during 1951-2005 were studied.

And it's based on the sunspot cycle theory that the Mayans put together, and we are definitely in a sunspot cycle. . .

Thanks to their efforts, we know that sunspot numbers ebb and flow in cycles lasting about 11 years.

there is probably the big or huge flood in the Jianghuai Valley around the year of magnetic cycle transformation of sunspot activity;

Relation between mean torrential rain days in Fuxin and relative number of sunspots in each cycle of sunspot valley value

A Discussion on the Cause of Formation of the Sunspot Activity Cycle

Correlation Analysis of Sunspot Activity and Qingdao Temperature

The Relationship between Population Birthrate and Sunspot

Sunspot group classifications by magnetic polarity

The Fractal Research and Predicating on the Time Series of Sunspot Relative Number

A Method for the Prediction of the Monthly Smoothed Sunspot Numbers of the 23th Cycle

Relation of Traffic Accidents in Wuhan City with Sunspot Activity

Analyzed Period of the Sunspot with Digital Signal Processing Method

Sunspot number prediction based on process neural network with time-varying threshold functions

Geomagnetic activity indicates large amplitude for sunspot cycle 24

chapter 7 has a comparable discussion on the how sunspot cycles affect weather;

Sunspot Loops in Ultraviolet

Like at the center of a big sunspot

A new model of total solar irradiance based on sunspot areas