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Solar wind
speed: 352.1 km/sec
density: 2.5 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: B4
1817 UT Jun13
24-hr: B9
1452 UT Jun13
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 13 Jun 13
New sunspot AR1768 is growing but does not yet pose a threat for strong solar flares. Credit: SDO/HMI
Sunspot number: 27
What is the sunspot number?
Updated 13 Jun 2013

Spotless Days
Current Stretch: 0 days
2013 total: 0 days (0%)
2012 total: 0 days (0%)
2011 total: 2 days (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
Since 2004: 821 days
Typical Solar Min: 486 days

13 Jun 2013

The Radio Sun
10.7 cm flux: 93 sfu
explanation | more data
Updated 13 Jun 2013

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
explanation | more data
Interplanetary Mag. Field
Btotal: 4.1 nT
Bz: 1.2 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 13 Jun 13
There are no large coronal holes on the Earthside of the sun. Credit: SDO/AIA.

NEW: is now posting daily satellite images of noctilucent clouds (NLCs), which hover over Earth's poles at the edge of space. The data come from NASA's AIM spacecraft. The north polar "daisy" pictured below is a composite of near-realtime images from AIM assembled by researchers at the University of Colorado's Laboratory for Atmospheric and Space Physics (LASP).
Noctilucent Clouds
Switch view: Europe, USA, Asia, Polar
Updated at: 06-13-2013 15:55:02
NOAA Forecasts
Updated at: 2013 Jun 13 2200 UTC
0-24 hr
24-48 hr
10 %
10 %
01 %
01 %
Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at: 2013 Jun 13 2200 UTC
0-24 hr
24-48 hr
10 %
10 %
01 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
20 %
20 %
15 %
15 %
Thursday, Jun. 13, 2013
What's up in space

They came from outer space--and you can have one! Genuine meteorites are now on sale in the Space Weather Store.

Own your own meteorite

QUIET SUN: With only two quiet sunspots dotting the solar disk, solar activity remains low. NOAA estimates a 5% chance of M-class solar flares and a scant 1% chance of X-class flares during the next 24 hours. Solar flare alerts: text, voice.

AN OUTBREAK OF MAGNETIC FILAMENTS: The sunspot number may be low, but the sun is far from blank. Amateur astronomers monitoring the sun report a large number of magnetic filaments snaking across the solar disk. Sergio Castillo captured more than half a dozen in this picture he sends from his backyard observatory in Inglewood, California:

"Filaments are popping up all over the solar surface," says Castillo. "Each one has a unique shape and length."

The longest one, in the sun's southern hemisphere stretches, more than 400,000 km from end to end. "It's one of the longest filamentary structures I have ever seen," says veteran observer Bob Runyan of Shelton, Nebraska.

If any of the filaments collapses, it could hit the stellar surface and explode, producing a Hyder flare. Filaments can also become unstable and erupt outward, hurling pieces of themselves into space. Either way, astronomers with solar telescopes are encouraged to monitor developments.

Realtime Space Weather Photo Gallery

GAMMA DELPHINID METEORS: On June 11, 1930, Earth passed through a stream of debris from an unknown long-period comet, producing a flurry of gamma Delphinid meteors. Two days ago, on June 11, 2013, researchers said it might happen again. It didn't; the expected outburst failed to materialize. Nevertheless, a small number of candidate gamma Delphinids were seen by observers around the world. Yuri Beletsky captured these over the Las Campanas observatory in Chile:

"Meteor activity was lower than expected," says Beletsky. "Even so, we saw a few of them."

Thomas Ashcraft also recorded a spectacular gamma Delphinid over his private observatory in rural New Mexico: movie. "The fireball appeared ten minutes from the predicted outburst peak time," notes Ashcraft.

"It is still possible that we glanced the dust trail and caught a few meteors," says Peter Jenniskens of the SETI Institute, one of the forecasters who predicted the return of the gamma Delphinids. "At 8:32 UT, I myself saw a short bright +1 meteor radiate from Aquila in a clearing between clouds at Lick Observatory. Sadly, other sites of our video camera network were clouded out. Given that the shower's radiant may have been at a different location [compared to 1930], please do keep collecting photographs of meteors taken that night. Single-station photographs may yet identify a compact radiant. Once we know the radiant, we can make more accurate predictions for the future. "

Realtime Meteor Photo Gallery

AURORAS + NOCTILUCENT CLOUDS: On Sunday, June 9th, Alan Dyer of Gleichen, Alberta, Canada, went outside to see the colors of the sunset. He got more than he bargained for. Stacked atop the rosy glow of twilight were dual bands of electric-blue noctilucent clouds and green auroras:

"At times the auroral curtains appeared superimposed on the noctilucent clouds," says Dyer. "It isn't often we see the two phenomena together."

That's because they are completely unrelated. Auroras are caused by energetic particles from the sun raining down on Earth's upper atmosphere, causing the air to glow like the picture tube of a color TV. Noctilucent clouds are made of tiny ice crystals wrapped around bits of meteor smoke. Their electric-blue color comes from the scattering of high altitude sunlight. On June 9th the two phenomena overlapped for a rare display.

"Adding to the colours was the deep orange of perpetual twilight rimming the northern horizon," continues Dyer. "It was a beautiful pre-solstice night."

More aurora-noctilucent overlaps might be in the offing. NLC experts say noctilucent clouds have appeared bright and early this year, while 2013 might bring the late surge of a double-peaked Solar Max. High-latitude sky watchers should keep an eye on the sunset. Aurora alerts: text, voice.

Realtime Noctilucent Cloud Photo Gallery
[previous years: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011]

Realtime Aurora Photo Gallery

Realtime Comet Photo Gallery

  Near Earth Asteroids
Potentially Hazardous Asteroids (PHAs) are space rocks larger than approximately 100m that can come closer to Earth than 0.05 AU. None of the known PHAs is on a collision course with our planet, although astronomers are finding new ones all the time.
On June 13, 2013 there were 1397 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2013 LR6
Jun 8
0.3 LD
12 m
2013 LD2
Jun 10
6 LD
49 m
1999 WC2
Jun 12
39.2 LD
1.9 km
2006 RO36
Jun 18
70.9 LD
1.2 km
2001 PJ9
Jul 17
29.2 LD
1.1 km
2006 BL8
Jul 26
9.3 LD
48 m
2003 DZ15
Jul 29
7.6 LD
153 m
2005 WK4
Aug 9
8.1 LD
420 m
1999 CF9
Aug 23
24.7 LD
1.1 km
2002 JR9
Aug 31
63.5 LD
1.4 km
Notes: LD means "Lunar Distance." 1 LD = 384,401 km, the distance between Earth and the Moon. 1 LD also equals 0.00256 AU. MAG is the visual magnitude of the asteroid on the date of closest approach.
  Essential web links
NOAA Space Weather Prediction Center
  The official U.S. government space weather bureau
Atmospheric Optics
  The first place to look for information about sundogs, pillars, rainbows and related phenomena.
Solar Dynamics Observatory
  Researchers call it a "Hubble for the sun." SDO is the most advanced solar observatory ever.
  3D views of the sun from NASA's Solar and Terrestrial Relations Observatory
Solar and Heliospheric Observatory
  Realtime and archival images of the Sun from SOHO.
Daily Sunspot Summaries
  from the NOAA Space Environment Center
  the underlying science of space weather
Space Weather Alerts
  more links...
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