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pi_122995883
quote:
M-CLASS SOLAR FLARE: New sunspot AR1675 has just unleashed the most intense flare of the year so far, an M1.9-class explosion at 1550 UT on Feb. 17th. Stay tuned for details.
http://www.spaceweather.com/
pi_122997513
double-flash of extreme UV radiation...
Daar hebben we niks aan
Een CME zou beter zijn
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  Moderator dinsdag 19 februari 2013 @ 15:55:27 #229
8781 crew  Frutsel
pi_123075995
quote:
FAST-GROWING SUNSPOT: Less than a day ago, sunspot AR1678 didn't exist. Now it is three times wider than our entire planet. NASA Solar Dynamics Observatory recorded the sunspot's rapid development:

Sunspots are islands of magnetism that float on the surface of the sun. This one is emerging from depth and changing at such a rapid pace that its magnetic field is likely unstable. A reconnection event in AR1678's magnetic canopy could lead to a significant solar flare.
Wat nietig zijn we toch.... binnen 24 uur een zonnevlek van niets tot drie keer de grootte van de aarde :{ :')
  Moderator woensdag 20 februari 2013 @ 14:53:21 #230
8781 crew  Frutsel
pi_123118321
quote:
CHANCE OF FLARES: New sunspot AR1678 has developed a delta-class magnetic field that harbors energy for strong explosions. NOAA forecasters estimate a 55% chance of M-flares and a 15% chance of X-flares during the next 24 hour
Wat wordt het? Een X ??
pi_123122117
Medium... daar hou ik het op
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  Moderator vrijdag 22 februari 2013 @ 10:40:49 #232
8781 crew  Frutsel
pi_123197032


quote:
NASA sees monster sunspot growing fast
A colossal sunspot on the surface of the sun is large enough to swallow six Earths whole, and could trigger solar flares this week, NASA scientists say.

The giant sunspot was captured on camera by NASA's Solar Dynamics Observatory as it swelled to enormous proportions over the 48 hours spanning Tuesday and Wednesday (Feb. 19 and 20). SDO is one of several spacecraft that constantly monitor the sun's space weather environment.

"It has grown to over six Earth diameters across, but its full extent is hard to judge since the spot lies on a sphere, not a flat disk," wrote NASA spokeswoman Karen Fox, of the agency's Goddard Space Flight Center in Greenbelt, Md., in an image description.

The sunspot region is actually a collection of dark blemishes on the surface of the sun that evolved rapidly over the last two days. Sunspots form from shifting magnetic fields at the sun's surface, and are actually cooler than their surrounding solar material.

According to Fox, some of the intense magnetic fields in the sunspot region are pointing in opposite directions, making it ripe for solar activity.

"This is a fairly unstable configuration that scientists know can lead to eruptions of radiation on the sun called solar flares," Fox explained.

The sun is currently in the midst of an active phase of its 11-year solar weather cycle and is expected to reach peak activity sometime this year. The current sun weather cycle is known as Solar Cycle 24.

NASA's Solar Dynamics Observatory launched in 2010 and is just one of a fleet of spacecraft keeping close watch on the sun for signs of solar flares, eruptions and other space weather events
pi_123199948
dat is toch niet medium :P
  Moderator vrijdag 22 februari 2013 @ 12:06:41 #234
8781 crew  Frutsel
pi_123200027
quote:
0s.gif Op vrijdag 22 februari 2013 12:04 schreef downgrade het volgende:
dat is toch niet medium :P
Medium als in de trend van " solar flare"... kan maar zo dat de sunspot niets uitpoept of tig C/M klasse zonnevlammen die wel "medium" zijn...
pi_123200382
quote:
6s.gif Op vrijdag 22 februari 2013 12:06 schreef Frutsel het volgende:

[..]

Medium als in de trend van " solar flare"... kan maar zo dat de sunspot niets uitpoept of tig C/M klasse zonnevlammen die wel "medium" zijn...
:)
den deze
CHANCE OF FLARES: New sunspot AR1678 has developed a delta-class magnetic field that harbors energy for strong explosions. NOAA forecasters estimate a 45% chance of M-flares and a 15% chance of X-flares during the next 24 hours. Solar flare alerts: text, voice.
  Moderator maandag 25 februari 2013 @ 12:12:27 #237
8781 crew  Frutsel
pi_123319850
En zo was AR1678 ineens weer 'weg' ?
pi_123532227
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  Moderator donderdag 11 april 2013 @ 12:31:26 #239
8781 crew  Frutsel
pi_125149574
M6 klasse zonnevlak



Zou aarde nog een schampschot kunnen geven
pi_125188351
quote:
0s.gif Op donderdag 11 april 2013 12:31 schreef Frutsel het volgende:
M6 klasse zonnevlak

[ afbeelding ]

Zou aarde nog een schampschot kunnen geven
quote:
STRONG SOLAR FLARE: The magnetic field of sunspot AR1719 erupted on April 11th at 0716 UT, producing an M6-class solar flare. NASA's Solar Dynamics Observatory recorded the explosion's extreme ultraviolet flash:



Coronagraph images from the Solar and Heliospheric Observatory (SOHO) show a CME emerging from the blast site. The expanding cloud should hit Earth's magnetic field during the early hours of April 13th, possibly sparking geomagnetic storms and auroras.

http://www.spaceweather.com/
  Moderator dinsdag 7 mei 2013 @ 16:10:28 #242
8781 crew  Frutsel
pi_126176025
quote:
NASA legt spectaculaire zonnevlam vast
Afgelopen week produceerde de zon week opnieuw een heftige zonnevlam. De zon spoot de zonnevlam ongeveer 200.000 kilometer de ruimte in, maar was niet gericht op de aarde. NASA's ruimtesonde Solar Dynamics Observatory (SDO) legde de uitbarsting vast.

Zonnevlammen kunnen invloed hebben op de aarde. De zonnevlam van afgelopen vrijdag was er een uit de M-klasse, een matige uitbarsting. Afhankelijk van de richting van de zonnevlam, kunnen zonnevlammen in de M-klasse rond de polen tijdelijke uitval van radioverbindingen veroorzaken.

Naast de M-klasse bestaan er ook zonnevlammen in de klasse X en C. De uitbarstingen in de klasse C hebben nauwelijks invloed op de aarde, maar de klasse X zijn erg heftig en kunnen ervoor zorgen dat radioverbindingen en elektriciteitscentrales uitvallen.

Dit jaar zullen veel meer van dit soort verschijnselen op de zon te zien zijn. De zon nadert namelijk een zonnemaximum, het hoogtepunt in de elfjarige cyclus van de zon. Tijdens zo'n maximum produceert de zon veel zonnevlekken en zonnevlammen. NASA verwacht dat het hoogtepunt eind dit jaar bereikt wordt.

De tot nu toe sterkste zonnevlam van 2013 vond op 11 april plaats (zie foto hieronder). Hierbij produceerde de zon ook een coronale massa-ejectie. Bij zo'n eruptie wordt een flinke stroom geladen deeltjes de ruimte in gestuurd.

Wanneer de eruptie op de aarde gericht is, kan dit resulteren in een poollicht. De geladen deeltjes komen dan in botsing met moleculen, hierdoor ontstaan indrukwekkende kleuren aan de hemel, zoals hier of hier te zien is.

Een zonnevlam is een grote explosie op de zon. Deze ontstaat doordat de energie die in de magnetische velden van de zon wordt vastgehouden, plotseling vrijkomt.

Ruimtesonde Solar Dynamics Observatory (SDO) werd in 2010 gelanceerd en bestudeert tot en met 2015 de zon, om zo meer te weten te komen over de invloed van de zon op de aarde.
  Moderator dinsdag 7 mei 2013 @ 16:12:38 #243
8781 crew  Frutsel
pi_126199338
nog even iets anders, ...
als je in de buurt bent, leuk om es heen te gaan ; Zeeuwse Zonnige Zomeravonden
(over relatie zon – aarde en zonnetelescopen)
zie :
www.innaamderwetenschap.nl
  Moderator maandag 13 mei 2013 @ 12:16:04 #245
8781 crew  Frutsel
pi_126424455
Strongest Flash of the year so far

quote:
A sunspot hiding behind the sun's northeastern limb erupted on May 13th at 02:17 UT, producing the strongest solar flare of the year so far. NASA's Solar Dynamics Observatory recorded the extreme UV flash from the X1.7-class eruption:

Coronagraphs onboard the Solar and Heliospheric Observatory (SOHO) tracked a bright CME emerging from the blast site: movie. No planets were in the line of fire. However, the CME appears to be on course to hit NASA's Epoxi and Spitzer spacecraft on May 15th.

The sunspot that produced this blast is on the farside of the sun. Soon, in a few days, it will turn toward Earth, emerging into view over the sun's eastern limb. Stay tuned for a better view and, perhaps, more flares

Bron: Spaceweather
  Moderator dinsdag 14 mei 2013 @ 10:08:11 #247
8781 crew  Frutsel
pi_126467067
Ook nog een X3.2 er achter aan...

quote:
SOLAR ACTIVITY SURGES: A sunspot on the sun's eastern limb is crackling with powerful X-class solar flares. Just-numbered AR1748 announced itself during the early hours of May 13th with an X1.7-class eruption (0217 UT), quickly followed by an X2.8-class flare (1609 UT) and an X3.2-class flare (0117 UT on May 14). These are the strongest flares of the year so far, and they signal a significant increase in solar activity. NOAA forecasters estimate a 40% chance of more X-flares during the next 24 hours.
pi_126468440
Hoi zon, je bent goed wakker zo te zien!

3 X flares in 24 uur, dat word nog spannend als AR1748 onze kant gaat opkijken.
pi_126532019
quote:
0s.gif Op dinsdag 14 mei 2013 10:53 schreef Scrummie het volgende:
Hoi zon, je bent goed wakker zo te zien!

3 X flares in 24 uur, dat word nog spannend als AR1748 onze kant gaat opkijken.
+ 1

ANOTHER X-FLARE ON MAY 15:
When the week began, the sun hadn't unleashed an X-flare all year long. In only two days, sunspot AR1748 has produced four. The latest X-flare from this active sunspot occured on May 15th at 0152 UT. NASA's Solar Dynamics Observatory captured the extreme ultraviolet flash:

Although the sunspot is not directly facing Earth, this flare might have produced a CME with an Earth-directed component. We are waiting for coronagraph data from SOHO and the twin STEREO probes to check this possibility. Stay tuned for updates.

In summary, AR1748 has produced an X1.7-class flare (0217 UT on May 13), an X2.8-class flare (1609 UT on May 13), an X3.2-class flare (0117 UT on May 14), and an X1-class flare (0152 on May 15). These are the strongest flares of the year, and they signal a significant increase in solar activity

---------------------------------------------------------------------------------------------------------------------------------------

Although AR1748 is not directly facing Earth, its strong flares have nevertheless affected our atmosphere. UV and X-radiation hitting the top of the atmosphere ionizes atoms and molecules, creating ion waves over the dayside of the planet. Roberto Battaiola detected these waves on May 13th using a Sudden Ionospheric Disturbance monitor in Milan, Italy:



Sudden ionospheric disturbances--"SIDs" for short--make themselves known by the effect they have on low-frequency radio signals. When a SID passes by, the atmosphere overhead becomes an good reflector for radio waves, allowing signals to be received from distant transmitters. Battaiola monitored a faraway 21.75 kHz radio station to monitor the SIDs over his location.

More SIDS are in the offing as NOAA forecasters estimate an 80% chance of M-flares and a 50% chance of X-flares during the next 24 hours.


www.spacewather.com

[ Bericht 22% gewijzigd door -CRASH- op 15-05-2013 14:22:58 ]
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pi_126550440
CHANCE OF FLARES:
NOAA forecasters estimate a 50% chance of X-class solar flares and an 80% chance of M-class solar flares today.
The source would be active sunspot AR1748, which is turning toward Earth.
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