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The Very Latest SOHO Images 14 oct / 9:30 EEST

[attachment=6719:200910/post_1636_1255501617_19f850d6b6886160015921d52f5d6a28.attach][attachment=6720:200910/post_1636_1255501637_c1e913e005f5ae7ed9c138ef1486c8d9.attach][attachment=6721:200910/post_1636_1255501658_e64a193edc17be165c2fe06dfeceaee0.attach][attachment=6722:200910/post_1636_1255501673_937b629916d06d68d1d7e892b47a7a86.attach]
 

[attachment=7460:200911/post_1636_1258700231_7f1e82662c2af888d35c614e1cecbac4.attach][attachment=7460:200911/post_1636_1258700231_7f1e82662c2af888d35c614e1cecbac4.attach]The Very Latest SOHO Images 20 noe 2009 / 8:30 EET
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http://sohowww.nascom.nasa.gov/data/realtime-images.html#

[attachment=7459:200911/post_1636_1258700082_9864a3cdfecf344a056a41d3ed66b481.attach]
[attachment=7460:200911/post_1636_1258700231_7f1e82662c2af888d35c614e1cecbac4.attach][attachment=7460:200911/post_1636_1258700231_7f1e82662c2af888d35c614e1cecbac4.attach]A solar wind stream flowing from the indicated coronal hole should reach Earth on Nov. 20th or 21st. Credit: SOHO Extreme UV
http://www.spaceweather.com/
 

The Very Latest SOHO Images 25 noe 2009 / 8:20 EET

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http://sohowww.nascom.nasa.gov/data/realtime-images.html# ... clic ici pentru detalii

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November Northern Lights Gallery
Artice: ICE HALO ENIGMA
http://www.spaceweather.com/ ... clic ici pentru detalii
 
[font="Arial, Helvetica, sans-serif"]FARSIDE ERUPTION: [/font]

[font="Arial, Helvetica, sans-serif"] [/font]An active region on the farside of the sun erupted during the early hours of Jan. 13th and hurled a bright coronal mass ejection (CME) into space. Click on the image to play a movie of the expanding cloud recorded by the Solar and Heliospheric Observatory (SOHO):



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Although the explosion happened on the sun's farside, one spacecraft had a direct view: STEREO-B is stationed over the sun's eastern limb almost directly above the blast site. The spacecraft's extreme UV telescope recorded the entire event. This movie shows the eruption and the shadowy shock wave it propelled through the sun's atmosphere.​
The source of the activity, probably a big sunspot, won't remain on the farside for long. The sun's rotation is turning it toward Earth, and geoeffective solar activity could commence within days​

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[font="Arial, Helvetica, sans-serif"]FARSIDE ACTIVITY CONTINUES:[/font]

For the second day in a row, an active region on the far side of the sun is exploding and hurling CMEs into space.

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Today's eruption was almost as dramatic as yesterday's, and suggests that more eruptions are in the offing.​
These explosions are occuring almost directly beneath NASA's STEREO-B spacecraft. An onboard telescope has recorded bright flashes of extreme UV radiation and shadowy shock waves emanating from the blast site (Jan. 13th movie). The telescope has also pinpointed the source: It is located just over the sun's eastern limb. Solar rotation is turning the region toward Earth, so geoeffective solar activity could commence within days​


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[font="Arial, Helvetica, sans-serif"]PLASMA RAIN[/font]

A sheet of plasma more than 350,000 km wide is rising and falling along the sun's southwestern limb today. It's so big, it makes an easy target for backyard observatories. Amateur astronomer Michael Buxton sends this time lapse movie from Ocean Beach, California:

Plasma rain video


"I made the movie at 1 minute intervals from 1753-1934 UT on Jan. 18th," he explains. "It was a real jaw dropper. Even in my small telescope (a 4-inch Takahashi refractor with a H-alpha solar filter) you could clearly see blobs of plasma falling to the stellar surface."​
Latest images from NASA's Dynamics Observatory show that the prominence is still present and active. Readers with solar telescopes are encouraged to monitor the plasma rain.​
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​

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A prominence that was raining plasma onto the sun's southwestern limb on Jan. 18th and 19th erupted during the early hours of Jan. 20th. NASA's Solar Dynamics Observatory recorded the action:

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The prominence hurled part of itself into space, but the resulted plasma cloud was not directed toward Earth. This eruption was photogenic, not geoeffective. Attention now turns to the northeastern limb where another rainstorm is brewing.

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[font="Arial, Helvetica, sans-serif"]SUNSPOT ACTIVITY[/font]
A rash of small spots is rapidly emerging near the main core of sunspot group 1147, and this could herald an increase in solar activity. Click on the link, below, to launch a 9 MB movie from Solar Dynamics Observatory

Movie


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The reason this rash is interesting has to do with its magnetic characteristics. It is an evolving jumble of magnetic polarities, with positive (+) pressing against negative (-) in many places. These are favorable condition for magnetic reconnection and solar flares. researchers with solar telescopes are encouraged to monitor the region for further developments

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Pete solare 23.01.2011

Sunspot 1149 poses a threat for M-class solar flares. Credit: SDO/HMI

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Detalii



Rogerio Marcon


Location
Campinas SP Brasil
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Details:
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AR 1147 and 1149 with complex magnetic configuration visible in h-alpha.

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Spitting plasma

Departing sunspot 1149 is spitting plasma as it rounds the sun's northwestern limb.

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Earth is not in the line of fire. No planet is. The plasma clouds ejected by these blasts will billow approximately midway between Mercury and Venus tomorrow without disturbing either world. The eruptions are ongoing, so the movie will likely grow longer as the day wears on. Stay tuned.

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Double eruption

Jan. 28th began with not one but two major eruptions on the sun. Separated by more than a million kilometers, the two blasts occurred almost simultaneously on opposite corners of the solar disk. Click on the image to view a movie recorded by NASA's Solar Dynamics Observatory


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On the lower left, a magnetic filament became unstable and erupted, hurling a portion of itself into space. On the upper right, departing sunspot 1149 produced an M1-class solar flare and a bright coronal mass ejection (stay tuned for a SOHO movie of the CME). Is this all a big coincidence? Maybe not. New research shows that eruptions on the sun can "go global" with widely separated blasts unfolding in concert.​
These blasts are going to miss in concert, too. Plasma clouds ejected by the two eruptions will sail wide of our planet, one on the left and one on the right. No Earth-effects are expected​


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Coronal Hole


A dark croissant-shaped hole has opened up in the sun's atmosphere, and it is spewing a stream of solar wind into space. NASA's Solar Dynamics Observatory took this picture of the vast opening during the early hours of Jan. 30th:


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Detalii




Researchers call this a "coronal hole." Solar rotation is turning the coronal hole toward Earth. The stream of solar wind pouring from it will swing around and hit our planet in early February, possibly sparking polar magnetic storms. High-latitude sky watchers should be alert for auroras between Feb. 2nd and 4th.


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[font="Arial, Helvetica, sans-serif"]
SOLAR ACTIVITY HEATS UP: [/font]

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[font="Arial, Helvetica, sans-serif"][/font]Formerly quiet sunspot 1153 is suddenly crackling with C- and M-class solar flares. NASA Solar Dynamics Observatory recorded this eruption during the waning hours of Feb. 8th

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Credit: SDO/HMI


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[font="Arial, Helvetica, sans-serif"]EARTH-DIRECTED SOLAR FLARE: [/font]On Feb. 13th at 1738 UT, sunspot 1158 unleashed the strongest solar flare of the year so far, an M6.6-category blast. NASA's Solar Dynamics Observatory recorded an intense flash of extreme ultraviolet radiation, circled below:


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Detalii

The eruption produced a loud blast of radio waves heard in shortwave receivers around the dayside of our planet. In New Mexico, amateur radio astronomer Thomas Ashcraft recorded these sounds at 19 to 21 MHz. "This was some of the strongest radio bursting of the new solar cycle," he says. "What a great solar day."
Preliminary coronagraph data from STEREO-A and SOHO agree that the explosion produced a fast but not particularly bright coronal mass ejection (CME). The cloud will likely hit Earth's magnetic field on or about Feb. 15th. High-latitude sky watchers should be alert for auroras.

The source of this activity, sunspot 1158 is growing rapidly.

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Recorded movie

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Barely visible when the weekend began, the active region is now more than 100,000 km wide with more than half-a-dozen Earth-sized dark cores scattered beneath its unstable magnetic canopy. More Earth-directed eruptions are likely in the hours ahead.

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[font="Arial, Helvetica, sans-serif"]FIRST X-FLARE OF THE NEW SOLAR CYCLE: [/font]Sunspot 1158 has unleashed the strongest solar flare in more than four years. The eruption, which peaked at 0156 UT on Feb. 15th, registered X2 on the Richter scale of solar flares. NASA's Solar Dynamics Observatory recorded an intense flash of extreme ultraviolet radiation, circled below:

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X-flares are the strongest type of solar flare, and this is the first such eruption of new Solar Cycle 24. In addition to flashing Earth with UV radiation, the explosion also hurled a coronal mass ejection (CME) in our direction. The expanding cloud may be seen in this movie from NASA's STEREO-B spacecraft. Geomagnetic storms are likely when the CME arrives ~48 hours hence. Stay tuned for updates.

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[font="Arial, Helvetica, sans-serif"]SOLAR PROMINENCE: [/font]A gigantic tendril of hot plasma is whipping and dancing along the sun's northeastern limb. "Wow, what a monster!" says amateur astronomer Pete Lawrence, who sends this picture from his backyard observatory in Selsey UK:


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The plasma is barely contained by unstable loops of magnetism, and the whole structure could fly off into space later today. If it does erupt, Earth will not be in the line of fire. This solar activity is not geoeffective, merely photogenic. Readers with solar telescopes are encouraged to monitor the action.


more images: from the Solar Dynamics Observatory in Earth orbit
 
[font="Arial, Helvetica, sans-serif"]WAVES OF IONIZATION: [/font]Waves of ionization are rippling through Earth's upper atmosphere in response to the recent onslaught of solar flares. This affects the propagation of radio signals--suppressing some frequencies and boosting others. By monitoring distant transmitters at a frequency of 23.4 kHz, Rudolf Slosiar of Bojnice, Slovakia detected nearly a dozen sudden ionospheric disturbances (SIDs) on Feb. 18th:

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"Each surge in signal strength corresponds to a specific solar flare," notes Slosiar. "Individual peaks exactly match events recorded by Earth-orbiting satellites."

More waves of ionization are iin the offing as sunspot complex 1161-1162 continues to crackle with M-class solar flares. The next SID could be over your backyard. Do-it-yourself SID monitors are available from Stanford University.

more SIDS: from Roberto Battaiola of Pantigliate, Milan, ITALY; from Jan Karlovsky of Hlohovec, Slovakia; from Rob Stammes of Laukvik, Norway.

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[font="Arial, Helvetica, sans-serif"]BIG SUNSPOTS: [/font]Sunspot complex 1161-1162 quieted down over the weekend, producing few intense flares. Could it be the quiet before the storm? The tempestuous appearance of the region suggests more action could be in the offing. Rogerio Marcon sends this picture from his backyard observatory in Campinas SP Brasil:

Details:
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AR1161 and 1162 in h-alpha light. A big magnetic complex.
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Marcon recorded the image using an H-alpha filter tuned to the red glow of solar hydrogen. It reveals several dark magnetic cores, each larger than Earth itself, interconnected by turbulent arcs of magnetized plasma. Similar filters are now available in the Space Weather Store for readers who would like to see these 'spots with their own (safely filtered) eyes.

NOAA forecasters estimate a 60% chance of M-class solar flares during the next 24 hours. Stay tuned for action

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