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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 344.1 km/sec
density: 22.2 protons/cm3
explanation | more data
Updated: Today at 2343 UT
X-ray Solar Flares
6-hr max: B6
1820 UT Jul08
24-hr: C3
1331 UT Jul08
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 08 Jul 11
Sunspot 1243 has a beta-gamma magnetic field that harbors energy for M-class solar flares. Credit: SDO/HMI
Sunspot number: 42
What is the sunspot number?
Updated 07 Jul 2011

Spotless Days
Current Stretch: 0 days
2011 total: 1 day (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
Since 2004: 820 days
Typical Solar Min: 486 days

Updated 07 Jul 2011


The Radio Sun
10.7 cm flux: 86 sfu
explanation | more data
Updated 07 Jul 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: 5.3 nT
Bz: 4.2 nT south
explanation | more data
Updated: Today at 2345 UT
Coronal Holes: 07 Jul 11
A solar wind stream flowing from the indicated coronal hole should reach Earth on July 9th or 10th. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2011 Jul 08 2200 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: 2011 Jul 08 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
25 %
20 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
30 %
25 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
 
Friday, Jul. 8, 2011
What's up in space
 

They came from outer space--and you can have one! Genuine meteorites are now on sale in the Space Weather Store.

 
Own your own meteorite

LAST FLIGHT OF THE SPACE SHUTTLE: Space shuttle Atlantis lifted off from the Kennedy Space Center this morning on a 12-day mission to the International Space Station. Docking is scheduled for Sunday, July 10tth. Mission controllers say Atlantis is now safely in orbit. Is it about to pass over your backyard? Download the shuttle tracking app or check the Simple Satellite Tracker for farewell flyby predictions.

SOLAR STATIC: On July 7th, the sun produced a series of strong shortwave radio bursts. Click on the dynamic spectrum below to play a 21 MHz sample recorded by amateur radio astronomer Thomas Ashcraft in rural New Mexico. The action begins about 18 seconds into the 2 minute recording:

The roaring-static sound you just heard was a combo Type III-Type V solar radio burst caused by electron beams moving through the sun's outer atmosphere. The source of the electrons could be an newly-emerging sunspot group in the sun's southeastern quadrant, although this is not certain. The active region is crackling with C-class solar flares, and it could produce more radio sounds in the days ahead. Ham radio operators, point your Yagis toward the sun!

GREEN SKY: On July 5th, Carlton McMillan was camping along the shore of Fall Lake, Minnesota, when the water turned green. "It was just a reflection of the sky above," says McMillan, who captured the verdant glow in this 44-second exposure:

"We were camping with friends from Texas," he continues, "and they were happy to see the Northern Lights, however faint."

More green skies could be in the offing. NOAA forecasters estimate a 15% chance of minor geomagnetic storms on July 9-10 in response to an incoming solar wind stream. High-latitude sky watchers should remain alert for auroras.

more images: from Yuichi Takasaka of Sugar Lake, British Columbia, Canada; from Tony Wilder of Chippewa Falls, Wisconsin


2011 Noctilucent Cloud Gallery
[previous years: 2003, 2004, 2005, 2006, 2007, 2008, 2009]


June 2011 Aurora Gallery
[Aurora alerts: text, voice] [previous Junes: 2010, 2008, 2001]


June 15th Lunar Eclipse Gallery

  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 July 8, 2011 there were 1237 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2011 GA55
Jul 6
64.1 LD
--
1.0 km
2011 EZ78
Jul 10
37.3 LD
--
1.6 km
2003 YS117
Jul 14
73.9 LD
--
1.0 km
2007 DD
Jul 23
9.3 LD
--
31 m
2003 BK47
Jul 26
77.6 LD
--
1.1 km
2009 AV
Aug 22
49.7 LD
--
1.1 km
2003 QC10
Sep 18
50 LD
--
1.2 km
2004 SV55
Sep 19
67.5 LD
--
1.2 km
2007 TD
Sep 23
3.8 LD
--
58 m
2002 AG29
Oct 9
77.1 LD
--
1.0 km
2000 OJ8
Oct 13
49.8 LD
--
2.5 km
2009 TM8
Oct 17
1.1 LD
--
8 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
 
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