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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 374.7 km/sec
density: 4.9 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: C1
1858 UT Dec10
24-hr: C1
0631 UT Dec10
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 09 Dec 11
The face of the sun is peppered with spots, but none poses a threat for strong solar flares. Credit: SDO/HMI
Sunspot number: 116
What is the sunspot number?
Updated 08 Dec 2011

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

Updated 08 Dec 2011


The Radio Sun
10.7 cm flux: 145 sfu
explanation | more data
Updated 08 Dec 2011

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 3
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 8.3 nT
Bz: 2.9 nT north
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 09 Dec 11
There are no large coronal holes on the Earthside of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2011 Dec 10 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
20 %
20 %
CLASS X
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: 2011 Dec 10 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
05 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
10 %
MINOR
05 %
01 %
SEVERE
01 %
01 %
 
Saturday, Dec. 10, 2011
What's up in space
 

Don't just watch shooting stars. Wear them! Authentic meteorite jewelry for Christmas is now available in the SpaceWeather Store.

 
Meteorite jewelry

TOTAL LUNAR ECLIPSE: Today, Dec. 10th, the full Moon passed through the shadow of Earth, producing a total lunar eclipse visible across the Pacific hemisphere. Don Oberbeck sends this picture of the partially-eclipsed Moon setting behind the Rocky Mountains near Boulder, CO:

"The Moon set behind Long's Peak at 6:49 am MST shortly before totality," says Oberbeck.

During the total phase of the eclipse, the Moon turned a beautiful shade of copper-red. Browse the gallery for highlights from the eclipse zone.

Dec. 10th Total Lunar Eclipse Gallery

...AND A TOTALLY DIFFERENT ECLIPSE: On Dec. 8th, NASA's Solar Dynamics Observatory (SDO) observed an unusual event on the sun: An erupting cloud of plasma was eclipsed by a dark magnetic filament. Play the movie for a visual explanation:

The source of the explosion is a farside active region due to turn toward Earth in a few days. For now, though, the blast site lies just behind the sun's eastern limb--perfectly situated for this rare kind of eclipse. Note the filament of relatively cool dark material snaking across the sun's surface in the foreground. That filament partially blocks our view of hot plasma exploding behind it. By studying how the light of the explosion is filtered by the foreground material, SDO mission scientists might be able to learn something new about dark filaments on the sun.

  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 December 10, 2011 there were 1272 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2011 WV74
Dec 2
2.3 LD
--
13 m
2011 WU74
Dec 4
4.2 LD
--
23 m
2003 XV
Dec 7
1.1 LD
--
21 m
2003 WM7
Dec 9
47.6 LD
--
1.6 km
2000 YA
Dec 26
2.9 LD
--
80 m
2011 SL102
Dec 28
75.9 LD
--
1.0 km
2011 WS95
Dec 28
7.2 LD
--
49 m
1991 VK
Jan 25
25.3 LD
--
1.9 km
433 Eros
Jan 31
69.5 LD
--
8.5 km
2009 AV
Feb 16
44.9 LD
--
1.2 km
2000 ET70
Feb 19
17.7 LD
--
1.0 km
2011 CP4
Feb 23
9.1 LD
--
255 m
2008 EJ85
Mar 6
9.1 LD
--
44 m
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.
STEREO
  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
Heliophysics
  the underlying science of space weather
Science Central
Trade Show Displays
   
  more links...
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