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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 460.9 km/sec
density: 2.2 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: B1
2255 UT Sep09
24-hr: C2
0000 UT Sep09
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 09 Sept 10
A new sunspot may be forming at the circled location. Credit: SDO/HMI
Resolutions: 4096, 1024, 512
Sunspot number: 11
What is the sunspot number?
Updated 08 Sep 2010

Spotless Days
Current Stretch: 0 days
2010 total: 39 days (15%)
2009 total: 260 days (71%)
Since 2004: 807 days
Typical Solar Min: 486 days
explanation | more info
Updated 08 Sep 2010


The Radio Sun
10.7 cm flux: 75sfu
explanation | more data
Updated 08 Sep 2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 3.7 nT
Bz: 0.4 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 08 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 09 2201 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 Sep 09 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 %
 
Thursday, Sep. 9, 2010
What's up in space
 

iPHONE VS ANDROID! Actually, it doesn't matter which phone you carry. Our cool, new app turns both smartphones into field-tested satellite trackers. Learn more.

 

SEE THE SECRET SPACE PLANE: Readers in the USA and Canada, for the next week or so, the US Air Force's "secret" X-37B space plane will be making visible passes over many North American towns and cities. Check the Simple Satellite Tracker for viewing times--or turn your cell phone into a space plane tracker. It's simple.

EARTH DODGES ANOTHER BULLET: Just as sunspot 1105 was turning away from Earth on Sept. 8th, the active region erupted, producing a C3-class solar flare (peak @ 2330 UT) and a fantastic prominence. Here is a snapshot from the Solar Dynamics Observatory:

The eruption also hurled a bright coronal mass ejection (CME) into space: SOHO movie. The expanding cloud is heading into a part of the solar system not currently occupied by any planet--it's going to miss everything, including Earth. If such a CME did hit Earth's magnetic field, it would probably trigger strong geomagnetic storms. Maybe next time...

Update #1: Two new movies of the eruption are available from the Solar Dynamics Observatory--a big picture view in black-and-white and a spectacular close-up in three extreme ultraviolet colors.

Update #2: NASA's STEREO-Ahead spacecraft is stationed almost directly above sunspot 1105. A first-look movie shows a shadowy "solar tsunami" wave racing away from the blast site.

PURPLE AURORAS: Auroras are dancing around the Arctic Circle and some of them are purple. This is how the sky looked on Sept. 8th over Bø, Norway:

"It's not often I get to see purple auroras," says photographer Øystein Lunde Ingvaldsen. "This was truly a fantastic sight!"

Auroras get their colors from specific atoms and molecules in Earth's atmosphere. Green comes from oxygen molecules excited by geomagnetic activity. Purple, on the other hand, is usually a mixture of red and blue emissions from molecular nitrogen. O2 and N2 were both revved up in Norway last night!

More purple is possible tonight as a solar wind stream continues to buffet Earth's magnetic field. High-latitude sky watchers should remain alert for auroras.

NEW: Sept. 2010 Northern Lights Gallery
[previous Septembers: 2009, 2008, 2007, 2006, 2005, 2004, 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 September 9, 2010 there were 1144 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2010 LY63
Sep 7
56 LD
18
1.2 km
2010 RX30
Sep 8
0.6 LD
27
15 m
2010 RF12
Sep 8
0.2 LD
28
9 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
2000 JH5
Dec 7
47 LD
17
1.5 km
2010 JL33
Dec 9
16.6 LD
18
1.3 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
Current Solar Images
  from the National Solar Data Analysis Center
Science Central
   
  more links...
 
 
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