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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 365.4 km/sec
density: 0.8 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: B2
2335 UT Sep06
24-hr: C1
1500 UT Sep06
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 06 Sept 10
Sunspot 1105 is crackling with B-class solar flares. Credit: SDO/HMI
Resolutions: 4096, 1024, 512
Sunspot number: 58
What is the sunspot number?
Updated 05 Sep 2010

Spotless Days
Current Stretch: 0 days
2010 total: 39 days (16%)
2009 total: 260 days (71%)
Since 2004: 807 days
Typical Solar Min: 486 days
explanation | more info
Updated 05 Sep 2010


The Radio Sun
10.7 cm flux: 82 sfu
explanation | more data
Updated 05 Sep 2010

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: 6.3 nT
Bz: 0.6 nT north
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 06 Sept 10
There are no large coronal holes on the Earth-facing side of the sun. Credit: SDO/AIA
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Sep 06 2201 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
05 %
05 %
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 Sep 06 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
 
Monday, Sep. 6, 2010
What's up in space
 

AURORA ALERTS: Did you miss the Northern Lights? Next time get a wake-up call from Space Weather PHONE

 
SOLAR FLARE: Today at 1500 UT, magnetic fields above sunspot 1105 reconnected, producing a brief but explosive C1-class solar flare. NASA's Solar Dynamics Observatory recorded a bright flash of extreme UV radiation from the blast site: 0.7 MB movie. Sunspot 1105 is growing rapidly and seems poised to produce more flares in the hours ahead.

GREEN LIGHTS OVER GREEN LAND: Earth is entering a solar wind stream, and this is causing geomagnetic activity around the poles. "We have seen our first auroras of the season," reports Rune Christiansen of Nuuk, the captital city of Greenland:

It's been a while since Northern Lights were visible over Greenland. During summer, they are usually overwhelmed by the midnight sun. With the approach of northern autumn, however, Arctic nights are getting dark again and the auroras have returned. "I'm looking forward to a good season," says Christiansen.

NOAA forecasters estimate a 40% chance of geomagnetic activity during the next 24 hours as the solar wind continues to buffet Earth's magnetic field. High-latitude sky watchers should remain alert for auroras.

more images: from Sylvain Serre of Salluit, Nunavik, Quebec, Canada; from Jennith Peart of Baker Lake, Nunavut, Canada; from Lusine Akopyan of Thompson, Manitoba, Canada

August 2010 Northern Lights Gallery
[previous Augusts: 2009, 2008, 2007, 2006, 2005, 2004, 2003]

RASH SUNSPOT: It looks like the sun has developed rash. Sunspot group 1105 consists of more than 25 tiny spots scattered across an area some 40,000 km wide. Sascha Somodji sends this picture of the busy active region from his backyard observatory in Krefeld, Germany:

Sunspot group 1105 stands in marked contrast to nearby sunspot 1101, which consists of a single dark core. (Click here to see the two side by side.) If sunspot 1101 looks boring, that's because it is. The sunspot's magnetic underpinnings resemble a simple dipole, and the spot is correspondingly quiet. Sunspot group 1105, on the other hand, is much more complicated with a profusion of opposite magnetic polarities popping up and bumping together. Magnetic reconnection is happening there almost non-stop, causing sunspot 1105 to crackle with B-class solar flares. It is, indeed, a "rash sunspot."

more images: from Steve Rismiller of Milford, Ohio; from John Stetson of Portland, Maine; from Rolf Girssmann of Boostedt, Germany; from Cai-Uso Wohler of Bispingen, Germany;

  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 September 6, 2010 there were 1144 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2002 CY46
Sep 2
63.8 LD
16
2.2 km
2010 QG2
Sep 3
4.6 LD
24
62 m
2010 RB12
Sep 4
2.5 LD
27
18 m
2010 LY63
Sep 7
56 LD
18
1.2 km
2010 RX30
Sep 8
0.6 LD
27
16 m
2010 RF12
Sep 8
0.2 LD
28
10 m
2009 SH2
Sep 30
7.1 LD
25
45 m
1998 UO1
Oct 1
32.1 LD
17
2.1 km
2005 GE59
Oct 1
77 LD
18
1.1 km
2001 WN5
Oct 10
41.8 LD
18
1.0 km
1999 VO6
Oct 14
34.3 LD
17
1.8 km
1998 TU3
Oct 17
69.1 LD
15
5.3 km
1998 MQ
Oct 23
77.7 LD
17
1.9 km
2007 RU17
Oct 29
40.6 LD
18
1.0 km
2003 UV11
Oct 30
5 LD
19
595 m
3838 Epona
Nov 7
76.8 LD
16
3.4 km
2005 QY151
Nov 16
77.7 LD
18
1.3 km
2008 KT
Nov 23
5.6 LD
28
10 m
2002 EZ16
Nov 30
73.9 LD
18
1.0 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 site_images of the Sun from SOHO.
Daily Sunspot Summaries
  from the NOAA Space Environment Center
Current Solar site_images
  from the National Solar Data Analysis Center
Science Central
   
  more links...
 
 
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