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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 572.5 km/sec
density: 1.6 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: B1
1855 UT Sep24
24-hr: B2
0125 UT Sep24
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 24 Sept 10
Sunspot 1108 is slowly decaying and poses a diminishing threat for solar flares. Credit: SDO/HMI. Resolutions: 4096, 1024, 512
Sunspot number: 34
What is the sunspot number?
Updated 23 Sep 2010

Spotless Days
Current Stretch: 0 days
2010 total: 41 days (16%)
2009 total: 260 days (71%)
Since 2004: 809 days
Typical Solar Min: 486 days
explanation | more info
Updated 23 Sep 2010


The Radio Sun
10.7 cm flux: 84 sfu
explanation | more data
Updated 23 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: 4.8 nT
Bz: 0.6 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 24 Sept 10
Earth is inside a solar wind stream flowing from the indicated coronal hole. Credit: SDO/AIA
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Sep 24 2201 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
15 %
15 %
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 24 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
05 %
MINOR
05 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
25 %
05 %
MINOR
10 %
01 %
SEVERE
01 %
01 %
 
Friday, Sep. 24, 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.

 

SOLAR STORMS VEER OFF COURSE: Researchers using data from NASA's STEREO spacecraft have found that solar storms don't always travel in a straight line. This adds a surprising new twist to the science of space weather forecasting. Get the full story from Science@NASA.

MOONLIT AURORAS: A solar wind stream is buffeting Earth's magnetic field and causing auroras around the Arctic Circle. "The Super Harvest Moon was so bright that the Northern Lights were difficult to see," reports Yuichi Takasaka of Yellowknife in the Northwest Territories of Canada. "But from time to time they did make an appearance." He took this picture on Sept. 23rd using a Canon EOS 5D:

NOAA forecasters estimate a 30% chance of more geomagnetic activity during the next 24 hours as the solar wind continues to blow. Unfortunately, the Harvest Moon will continue to shine as well, overwhelming all but the most intense auroras.

News Flash: The Canadian Space Agency has just set up a camera in Yellowknife to broadcast the aurora borealis to the general public. It's part of a 5-year educational initiative to raise awareness of space weather and the sun's influence on Earth. Click here for live views.

Sept. 2010 Northern Lights Gallery
[previous Septembers: 2009, 2008, 2007, 2006, 2005, 2004, 2002, 2001, 2000]

HARVEST SURF: Far from the Arctic circle, the Harvest Moon is having a very different effect. "In Waikiki, a full Moon means more time to surf," reports Carey Johnson from Hawaii. "The feeling of catching a wave you can barely see is definitely exhilarating."

"We don't have to worry about sharks," says Johnson, "because Jupiter kept a watchful eye on us." And, in case you're wondering, Jupiter is easy to find. "Just follow the Tiki-torch."

more images: from Jens Hackmann of Weikersheim, Germany; from Tavi Greiner of Shallotte, NC; from Gerhard Dangl of Nonndorf, Austria; from John A. Ey III of Tucson,AZ; from James W. Young of Inspiration Point, California; from P-M Hedén of Vallentuna, Sweden; from John Chumack of Dayton, Ohio


  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 24, 2010 there were 1145 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2010 SF
Sep 16
8.3 LD
25.2
39 m
2010 SE
Sep 18
5.7 LD
24.4
57 m
2009 SH2
Sep 30
7.1 LD
24.9
45 m
1998 UO1
Oct 1
32.1 LD
16.6
2.1 km
2005 GE59
Oct 1
77 LD
18
1.1 km
2001 WN5
Oct 10
41.8 LD
18.2
1.0 km
1999 VO6
Oct 14
34.3 LD
16.9
1.8 km
1998 TU3
Oct 17
69.1 LD
14.6
5.3 km
1998 MQ
Oct 23
77.7 LD
16.7
1.9 km
2007 RU17
Oct 29
40.6 LD
18.1
1.0 km
2003 UV11
Oct 30
5 LD
19.3
595 m
3838 Epona
Nov 7
76.8 LD
15.5
3.4 km
2005 QY151
Nov 16
77.7 LD
17.6
1.3 km
2008 KT
Nov 23
5.6 LD
28.2
10 m
2002 EZ16
Nov 30
73.9 LD
18.2
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 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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