Solar activity - page 28

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An erupting cloud of plasma eclipsed by a dark magnetic filament

Last night, NASA's Solar Dynamics Observatory (SDO) observed an unusual event on the sun: An erupting cloud of plasma was eclipsed by a dark magnetic filament.The source of the explosion is a farside active region due to turn toward Earth in a few days. For now,

December 09, 2011

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Sunspot 1363 subsiding, solar activity remains low

After three days of meteoric growth, sunspot AR1363 has reversed course and is beginning to decay. As its magnetic field relaxes, the active region poses a subsiding threat for strong flares. It's not dead yet, though, as this snapshot shows: There is still a slim

December 06, 2011

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Rapidly growing Earth-faced Sunspot 1363 harbors energy for M-class solar flares

Sunspot AR1363 is growing rapidly, more than doubling in size since Friday. A 48-hour movie from NASA's SOlar Dynamic Observatory shows the expansion:The active region has a "beta-gamma" magnetic field that harbors energy for M-class solar flares. Because of

December 05, 2011

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Large solar prominence off northwest limb today

A magnetic filament rapidly erupted on the sun today. Between 10:30 and 11:30 UTC, observers in Europe watched tendrils of hot plasma rocket away from the sun's NW limb. Debris from the explosion is not expected to hit Earth according to SpaceWeather. Solar

December 03, 2011

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Solar activity at start of December

With no strong flares this week, the sun's x-ray output has nearly flatlined. The solar activity is quiet and is expected to continue for another 24+ hours. NOAA forecasters estimate a mere 20% chance of M-class solar flares.C-Class flares continue to be detected

December 02, 2011

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Solar prominence about 7 times the size of Earth occured on eastern limb

With no sunspots producing strong flares, the sun is officially quiet. But although the sun is officialy "quiet" multiple C-Class flares have been detected within the past 24 hours. C-Class flares continue to be detected around various locations on the visible solar

December 01, 2011

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Earth currents in Norway caused by solar wind stream

A solar wind stream is buffeting Earth's magnetic field and this is causing electrical currents to flow in the Earth itself at high latitudes.Rob Stammes sends this report from the Polar Light Center in Lofoten, Norway to SpaceWeather.com "Today, a magnetic

November 30, 2011

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Subsiding solar activity, small chances for M-class flares

Two new regions rotated into view on the eastern limb and were numbered 1363 and 1364 on Tuesday. Numerous low level C-Class flares have been detected within the past 24 hours around Sunspot 1362 and new Sunspot 1363.Region 1361 in the northern hemisphere is now

November 30, 2011

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Sunspots connected by sinuos filaments of magnetism

A line of sunspots stretching across the sun's northern hemisphere appears to be an independent sequence of dark cores. A telescope tuned to the red glow of solar hydrogen, however, reveals something different. The sunspots are connected by sinuous filaments of

November 29, 2011

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Subsiding radiation storm as new pair of CMEs taking place

A radiation storm that began on Nov. 26th when a magnetic filament erupted on the sun is subsiding. Nevertheless, the Earth-effects are just beginning. The same explosion that caused the radiation storm also hurled a CME into space at about 930 km/s (2 million mph).

November 28, 2011

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Radiation storm and CME heading toward Earth, geomagnetic storm and aurora events expected

A solar radiation storm is in progressaround Earth. At the moment, the storm is classified as minor, which means it has little effect on our planet other than to disturb HF radio transmissions at high latitudes. Bigger effects, however, may be in the offing. The

November 27, 2011

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Solar radiation storm in progress

A solar radiation storm is in progress around Earth. At the moment, the storm is classified as minor, which means it has little effect on Earth other than to disturb HF radio transmissions at high latitudes. Energetic protons, which make up the bulk of the storm,

November 27, 2011

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Black Friday solar eclipse

Earlier today, Nov. 25th, the new Moon passed in front of the sun, slightly off-center, producing a partial solar eclipse visible from Antarctica, Tasmania, and parts of South Africa and New Zealand. Maximum coverage occurred about 100 miles off the coast of

November 25, 2011

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Beautifull auroras and the interplanetary magnetic field

Officially, the odds of a geomagnetic storm on Nov. 24th were small but dedicated aurora watchers still had some opportunity to take some nice images of beautifull sky game. Auroras have been flickering around the Arctic Circle for several days. These displays are not

November 24, 2011

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Earth-facing sunspot 1356 harbors energy for M-class solar flares

Earth-facing sunspot 1356 has developed a "beta-gamma" magnetic field that harbors energy for M-class solar flares. NOAA forecasters estimate a 30% chance of such an eruption during the next 24 hours.A bright Coronal Mass Ejection (CME) is seen in the latest Lasco

November 23, 2011

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Filament eruption causing CME

A possible filament eruption in the northwest quadrant on Sunday has generated a slow moving Coronal Mass Ejection (CME). You can watch the STEREO Ahead COR2 movie below and it looks like a portion of this cloud may be Earth directed. Stay tuned for more

November 20, 2011

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Dark filament of magnetism visible on the Sun

It's one of the biggest things in the entire solar system. A dark filament of magnetism measuring more than 800,000 km from end to end is sprawled diagonally across the face of the sun. NASA's Solar Dynamics Observatory took this ultraviolet picture of the structure

November 18, 2011