Author Topic: SOLAR EVENTS (also current info on space weather)  (Read 103342 times)

Yowbarb

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1080 on: March 31, 2017, 11:21:43 PM »

Yowbarb

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1081 on: April 01, 2017, 08:27:34 AM »
No M flares yet.
6-hr max B9  Apr 01, 2017

http://spaceweather.com/

Yowbarb

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1082 on: April 01, 2017, 04:49:27 PM »

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1083 on: April 01, 2017, 04:55:40 PM »
M4 today.
...
http://spaceweather.com/

BIG SUNSPOT FACES EARTH: In a year of few sunspots, AR2645 is remarkable. The young spot has quickly grown from an almost invisible speck into a sprawling behemoth more than 120,000 km wide, with multiple dark cores larger than Earth. And, it is directly facing our planet.

Yowbarb

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1084 on: April 01, 2017, 11:07:58 PM »
http://spaceweather.com/

SIGNIFICANT SOLAR FLARE: Sunspot AR2644 erupted on April 1st, producing a significant M4-class solar flare. NASA's Solar Dynamics Observatory recorded the explosion's extreme UV flash.  SEE http://spaceweather.com/images2017/01apr17/m4_teal_2048.jpg?PHPSESSID=uhac64qdriga5f8iak0f7p4mg4

UV radiation from the flare caused a brief shortwave radio blackout on the Pacific side of Earth: map. People who might have noticed the blackout include ham radio operators and mariners using low-frequency rigs for communication at frequencies below 10 MHz.

The explosion also hurled a coronal mass ejection (CME) into space: image. The cloud is not heading directly for Earth, but a glancing blow is possible in the days ahead.  NOAA analysts are evaluating this possibility now.

NOTE: The source of this flare, AR2644, is not the big sunspot discussed below. While forecasters focused their attention on the huge sunspot facing Earth, a lesser sunspot near the sun's western limb exploded instead. Tricky sun.

BIG SUNSPOT FACES EARTH: In a year of few sunspots, AR2645 is remarkable.

Yowbarb

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1085 on: April 01, 2017, 11:11:51 PM »
http://spaceweather.com/

6-hr max: C8 0246 UT Apr02

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1087 on: April 02, 2017, 06:38:58 PM »

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1088 on: April 03, 2017, 10:11:00 PM »
Right now the 6-hour maximum solar flares is only C5, but on a trend the sun does seem to be waking up:
...
http://spaceweather.com/

THE SUN WAKES UP: Suddenly, solar flare activity is high. With little warning, sunspot AR2644 exploded on April 1st, producing an M4.4-class flare. That was the strongest solar flare of the year--for less than a day. The sunspot topped itself on April 2nd with a pair of M5-class explosions, followed by another M5-flare on April 3rd. The latest blast is shown here in a picture from NASA's Solar Dynamics Observatory.   



Flashes of extreme ultraviolet radiation, like the one shown above, have been ionizing Earth's upper atmosphere and altering the normal propagation of radio waves around our planet. There have been at least four significant shortwave radio blackouts; blackout maps: #1, #2, #3, #4. People who might have noticed these blackouts include ham radio operators and mariners using low-frequency rigs for communication at frequencies below 10 MHz.

Update: This series of explosions hurled a number of coronal mass ejections (CMEs) into space. NOAA computer models confirm that none of them will hit Earth.

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1089 on: April 04, 2017, 01:23:03 PM »
We did end up with a Geomagnetic Storm, after all, a G1 today.

http://spaceweather.com/


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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1090 on: April 04, 2017, 06:28:35 PM »
http://spaceweather.com/

WHERE WILL THE NEXT FLARE COME FROM? Today, there are two sunspots that pose a threat for strong flares: AR2644 and AR2645. Both have unstable delta-class magnetic fields that harbor energy for M- and X-class explosions. Their locations are circled in this April 4th image of the sun from NASA's Solar Dynamics Observatory. [See screen shot at end of post. ]

Sunspot AR2644 is of special interest. Since the month began, it has produced more than half-a-dozen M-class solar flares, with an equal number of shortwave radio blackouts on Earth. Moreover, this sunspot is magnetically well-connected to Earth. Look at this diagram. Magnetic fields spiraling back from AR2644's location on the sun's western limb lead almost directly to our planet. If AR2644 explodes today, energetic particles accelerated by the blast could be funneled toward Earth, producing a radiation storm above Earth's atmosphere.

NOAA forecasters estimate a 70% chance of M-class flares and a 25% chance of X-flares on April 4th.

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1091 on: April 06, 2017, 01:47:00 PM »
http://spaceweather.com/

SUBSIDING CHANCE OF FLARES: Earlier this week, solar flare activity was high as sunspot AR2644 unleashed a series of M-class explosions. Now, however, the sun is quieting. AR2644 has rotated off the solar disk and no longer poses a threat for Earth-directed flares.

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1092 on: April 09, 2017, 01:41:05 PM »
http://spaceweather.com/

BLANK SUN: Following a two week outburst of unexpected sunspot activity, the sun is blank again. The solar disk is completely devoid of spots. The sun's X-ray output is subsiding as the solar cycle resumes its progress toward Solar Minimum.

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1093 on: April 11, 2017, 05:45:28 PM »
http://spaceweather.com/

SOLAR FILAMENT EXPLODES, HURLS CME:
On April 9th, a dark filament of magnetism on the sun rose up and hurled a portion of itself into space.  NASA's Solar Dynamics Observatory recorded the eruption:
[Click link]
http://spaceweather.com/images2017/11apr17/20170411143328_512_aia_0304.mp4?PHPSESSID=g2hactdnegugecs7nfp0sht6h2

Flying debris from the filament formed the core of a coronal mass ejection (CME). A movie from the Solar and Heliospheric Observatory (SOHO) shows the cloud leaving the sun. At first it appeared that the CME would miss Earth, but a new analysis by NOAA forecasters suggests that a glancing glow is possible on April 15th. G1-class geomagnetic storms are possible when the CME arrives this weekend

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Re: SOLAR EVENTS (also current info on space weather)
« Reply #1094 on: April 21, 2017, 06:46:52 PM »
Not much happening at the moment with solar activity. Almost to the C-flare line...

http://services.swpc.noaa.gov/images/goes-xray-flux.gif

 

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