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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 365.6 km/sec
density: 3.5 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: B1
2020 UT Dec07
24-hr: B2
0022 UT Dec07
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 07 Dec 10
Sunspot 1131 is large enough to see without the aid of a solar telescope: sunset image. Credit: SDO/HMI 2-day movie: 6 MB mpg
Sunspot number: 35
What is the sunspot number?
Updated 06 Dec 2010

Spotless Days
Current Stretch: 0 days
2010 total: 45 days (13%)
2009 total: 260 days (71%)
Since 2004: 813 days
Typical Solar Min: 486 days

Updated 06 Dec 2010


The Radio Sun
10.7 cm flux: 89 sfu
explanation | more data
Updated 06 Dec 2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 5.5 nT
Bz: 0.0 nT
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 07 Dec 10
A solar wind stream flowing from the indicated coronal hole should reach Earth on or about Dec. 10th. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Dec 07 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
01 %
01 %
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: 2010 Dec 07 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
05 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
05 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
 
Tuesday, Dec. 7, 2010
What's up in space
 

ON SALE NOW: The David H. Levy Comet Hunter -- offering the clearest views of Comet Hartley 2.

 

GEMINID METEORS DEFY EXPLANATION: The annual Geminid meteor shower peaks this year on Dec. 13th and 14th. Researchers don't fully understand the Geminids, and new measurements, they say, make it more mysterious than ever. Get the full story from Science@NASA.

MARS POPS OUT: Last night (Dec. 6th), deep in western twilight, the crescent Moon eclipsed (occulted) Mars over North America. "I was perfectly placed to observe the event," says Doug Zubenel of De Soto, Kansas, who caught Mars popping out from behind the crescent. "It happened right behind the water tower of De Soto!"

EPIC BLAST: As predicted, the a "mega-filament" of solar magnetism erupted on Dec. 6th, producing a blast of epic proportions. NASA's Solar Dynamics Observatory recorded the action as the 700,000-km long structure lifted off the stellar surface and--snap!!--hurled itself into space. Click on the arrow to play the movie:


movie formats: 4 MB gif, 1 MB iPad, 0.5 MB iPhone, 1 MB still frame

The eruption produced a bright coronal mass ejection (CME) observed by the STEREO-A spacecraft: video. Earth was not in the line of fire; the cloud should sail wide of our planet. Earth-effects might be limited to pretty pictures.

more images: from Stephen W. Ramsden of Atlanta, GA

THE SHADOW OF EARTH: Imagine stepping out your front door and being swallowed up by the vast dark shadow of an entire planet. Actually, you've done it many times. The darkness you experience after sunset is the shadow of Earth itself. (Think about it.) If you happen to be outside right at sunset, you can sometimes catch Earth's shadow rising to extinquish the twilight. That's exactly what happened to Andrew Greenwood yesterday in England's Peak District National Park:

"I was climbing towards a hill known as Shining Tor when I broke through the fog into the most magical sunlit landscape," says Greenwood. "With the clouds below me, the air was crisp and ultra-transparent. It was at this point that I noticed Earth's shadow climbing into the ice-blue sky in the East. This spectacular vision is sometimes called the 'Belt of Venus.' Its contrast against the snow-covered hills was breath-taking; I could not have wished for a more memorable end to what was in fact my 38th birthday!"

more images: from Börkur Hrólfsson of Gullfoss, Iceland.


November 2010 Aurora Gallery
[previous Novembers: 2009, 2008, 2007, 2006, 2004, 2003, 2002, 2001, 2000]

  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 7, 2010 there were 1167 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2010 TQ19
Oct 8
9.6 LD
18
37 m
2010 TS19
Oct 10
3.7 LD
18
31 m
2010 TD54
Oct 12
0.1 LD
14
7 m
2010 TB54
Oct 13
6.1 LD
20
19 m
1999 VO6
Oct 14
34.3 LD
16
1.8 km
2010 TK
Oct 16
4.5 LD
18
37 m
1998 TU3
Oct 17
69.1 LD
13
5.2 km
2010 TG19
Oct 22
1.1 LD
15
70 m
1998 MQ
Oct 23
77.7 LD
15
1.9 km
2007 RU17
Oct 29
39.2 LD
15
1.1 km
2003 UV11
Oct 30
5 LD
12
595 m
3838 Epona
Nov 7
76.8 LD
14
3.4 km
2005 QY151
Nov 16
77.7 LD
17
1.3 km
2008 KT
Nov 23
5.6 LD
21
10 m
2002 EZ16
Nov 30
73.9 LD
16
1.0 km
2000 JH5
Dec 7
47 LD
-
1.5 km
2010 JL33
Dec 9
16.6 LD
13
1.3 km
2008 EA32
Jan 7
76.5 LD
-
2.1 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.
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
   
  more links...
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