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Post by clone on Mar 7, 2011 18:46:52 GMT -8
SOLAR ACTIVITY: The magnetic canopy of big sunspot 1166 erupted on March 7th around 1400 UT, producing an M2-class solar flare and a bright coronal mass ejection (CME). The CME was not squarely directed at Earth. Nevertheless, the cloud will probably deliver a glancing blow to our planet's magnetic field on March 9th or 10th, possibly sparking polar geomagnetic storms. spaceweather.com/
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Post by clone on Apr 4, 2011 21:44:15 GMT -8
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Post by clone on Apr 11, 2011 19:14:20 GMT -8
Stellar explosion Apr. 13, 2010 | 09:13 PDT | 16:13 UTC EDIT 11:54 PDT: Replaced the animation with a better one. (Thanks, Sunspot.) The Sun just spat out a huge coronal mass ejection, an event made visible by the watchful cameras on SOHO: The event is still evolving, so if you're reading this post even an hour after I post it, it would be worth your time to go to the SOHO website to see what's new. They have a cool "SOHO movie theater" Web feature that is an excellent example of how a mission can employ a simple, minimal Web interface, with no fancy, Flashy bells and whistles, to allow visitors to get quick access to the SOHO image data. planetary.org/blog/article/00002438/"SOHO movie theater" sohodata.nascom.nasa.gov/cgi-bin/soho_movie_theater
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Post by AR11200 on May 7, 2011 20:41:16 GMT -8
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Post by clone on Jun 15, 2011 0:10:06 GMT -8
According to their analysis, the cloud blew away from the sun at a speed of 830 km/s and it could deliver a glancing blow to Earth's magnetic field on June 17th at 10:50 UT (plus minus 7 hours). The impact is not expected to provoke strong geomagnetic storming. spaceweather.com/
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Post by clone on Jun 22, 2011 0:19:30 GMT -8
CME FORECAST, REVISED: A CME propelled toward Earth by the "solstice solar flare" of June 21st may be moving slower than originally thought. Analysts at the GSFC Space Weather Lab have downgraded the cloud's probable speed from 800 km/s to 650 km/s. Impact is now expected on June 24th at 0700 UT plus or minus 7 hours. In this animated forecast model, the yellow dot is Earth: spaceweather.com/
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Post by clone on Sept 7, 2011 17:48:13 GMT -8
SOLAR RADIO BURSTS: This week's sharp increase in solar activity has turned the sun into a radio transmitter. Bursts of shortwave static are coming from the unstable magnetic canopy of sunspot 1283. Yesterday in New Mexico, amateur radio astronomer Thomas Ashcraft recorded some samples at 21 MHz: listen. Radio listeners should remain alert for this kind of solar activity as sunspot 1283 continues to seethe. STRONG SOLAR ACTIVITY: Sunspot 1283 is crackling with solar flares. Yesterday, Sept. 6th, the active region produced an M5.3-class eruption at 0150 UT followed by a X2.1-class event at 2220 UT. spaceweather.com/
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Post by clone on Sept 22, 2011 18:13:53 GMT -8
During a geomagnetic storm on Sept. 17th, astronauts recorded a must-see movie of auroras dancing underfoot: spaceweather.com/
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Post by clone on Oct 5, 2011 18:23:00 GMT -8
Artificial Explosion of Sun. AB-Criterion for Solar Detonation By Alexander Bolonkin with Joseph Friedlander* Abstract The reader naturally asks: Why even contemplate such a horrible scenario? It is necessary because as thermonuclear and space technology spreads to even the least powerful nations in the centuries ahead, a dying dictator having thermonuclear missile weapons can produce (with some considerable mobilization of his military/industrial complex)— an artificial explosion of the Sun and take into his grave the whole of humanity. www.scribd.com/doc/24541542/Artificial-Explosion-of-Sun-AB-Criterion-for-Solar-Detonation
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Post by clone on Oct 24, 2011 19:26:29 GMT -8
CME IMPACT: A CME hit Earth's magnetic field on Oct. 24th at approximately 1800 UT (02:00 pm EDT). Acording to analysts at the Goddard Space Weather Lab, the impact caused a strong compression of Earth's magnetic field, allowing solar wind to penetrate all the way down to geosynchronous orbit for a brief period between 19:06 UT and 19:11 UT. The impact also sparked a geomagnetic storm, underway now. High-latitude sky watchers should remain alert for auroras as Earth's magnetic field continues to reverberate from the CME impact. The best time to look is usually during the hours around local midnight. ****************** A bright CME blasted off the sun yesterday, Oct. 22nd, and it appears to be heading for Mars. Analysts at the Goddard Space Weather Lab expect the cloud to reach the Red Planet on Oct. 26th (forecast track). A brief discussion of what CMEs can do to Mars follows this SOHO image of the eruption: Mars has a unique response to solar storms shaped by the planet's strange magnetic topology. Unlike Earth, which has a global magnetic field, Mars is patchily covered by dozens of "magnetic umbrellas"--remnants of an over-arching planetary field that decayed billions of years ago. When Mars gets hit by a CME, the resulting magnetic storms take place in the umbrellas. spaceweather.com/
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Post by clone on Nov 4, 2011 5:00:25 GMT -8
NOAA forecasters have upgraded the chance of X-class solar flares today to 20%. The source would be AR1339, one of the biggest sunspots in many years. The active region rotated over the sun's eastern limb two days ago and now it is turning toward Earth. The sunspot has already unleashed one X-flare on Nov. 3rd around 2027 UT. A cloud of plasma or "CME" raced away from the blast site at 1100 km/s. The CME is not heading for Earth. It is, however, heading for Mercury and Venus. spaceweather.com/
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Post by clone on Jan 23, 2012 17:19:59 GMT -8
RADIATION STORM IN PROGRESS: Solar protons accelerated by this morning's M9-class solar flare are streaming past Earth. ALMOST-X FLARE AND CME (UPDATED): This morning, Jan. 23rd around 0359 UT, big sunspot 1402 erupted, producing a long-duration M9-class solar flare. Analysts at the Goddard Space Weather Lab say the leading edge of the CME will reach Earth on Jan. 24 at 14:18UT (+/- 7 hours). This is a relatively substantial and fast-moving (2200 km/s) CME. Spacecraft in geosynchronous, polar and other orbits passing through Earth's ring current and auroral regions could be affected by the cloud's arrival. spaceweather.com/
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Post by clone on Jan 29, 2012 11:29:32 GMT -8
X-FLARE (UPDATED): Departing sunspot 1402 unleashed an X2-class solar flare on Jan. 27th at 18:37 UT. Sunspot 1402 is rotating onto the far side of the sun, so the blast site was not facing Earth. Nevertheless, energetic protons accelerated by the blast are now surrounding our planet, and an S2-class radiation storm is in progress. The explosion also produced a spectacular coronal mass ejection (CME). A movie from the Solar and Heliospheric Observatory shows the cloud racing away from the sun at 2500 km/s or 5.6 million mph. Update: Work by analysts at the Goddard Space Weather Lab shows that the CME will just miss Earth when its edge passes by our planet on Jan. 30-31. spaceweather.com/
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Post by pole flip on Feb 26, 2012 19:38:26 GMT -8
The Sun Does a Flip NASA scientists who monitor the Sun say that our star's awesome magnetic field is flipping -- a sure sign that solar maximum is here. February 15, 2001 -- You can't tell by looking, but scientists say the Sun has just undergone an important change. Our star's magnetic field has flipped. The Sun's magnetic north pole, which was in the northern hemisphere just a few months ago, now points south. It's a topsy-turvy situation, but not an unexpected one. The Sun's magnetic poles will remain as they are now, with the north magnetic pole pointing through the Sun's southern hemisphere, until the year 2012 when they will reverse again. This transition happens, as far as we know, at the peak of every 11-year sunspot cycle -- like clockwork. science.nasa.gov/science-news/science-at-nasa/2001/ast15feb_1/
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Post by clone on Jul 13, 2012 8:38:17 GMT -8
REVISED FORECAST: The CME launched toward Earth by yesterday's X-flare is moving faster than originally thought. Analysts at the Goddard Space Weather Lab have revised their forecast accordingly, advancing the cloud's expected arrival time to 09:17 UT (5:17 am EDT) on Saturday, July 14th. The explosion also strobed Earth with a pulse of extreme UV radiation, shown here in a movie recorded by NASA's Solar Dynamics Observatory: www.spaceweather.com/
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