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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
SPACE WEATHER
Current conditions
Solar wind
speed: 373.4 km/sec
density: 2.2 protons/cm3
explanation | more data
Updated: Today at 1556 UT
X-ray Solar Flares
6-hr max: A0
1545 UT Aug13
24-hr: A0
0910 UT Aug13
explanation | more data
Updated: Today at: 1545 UT
Daily Sun: 13 Aug 07
Sunspot 966 is fading away and poses no threat for strong solar flares. Credit: SOHO/MDI
Sunspot number: 11
What is the sunspot number?
Updated 11 Aug 2007
Far side of the Sun:
This holographic image reveals one possible sunspot on the far side of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 1
quiet
explanation | more data
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Updated: 2007 Aug 13 2112 UT
Interplanetary Mag. Field
Btotal: 2.8 nT
Bz: 0.8 nT south
explanation | more data
Updated: Today at 1549 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole should reach Earth on or about Aug. 15th. Credit: SOHO Extreme Ultraviolet Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2007 Aug 12 2203 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: 2007 Aug 12 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
What's up in Space
August 13, 2007
Where's Saturn? Is that a UFO--or the ISS? What's the name of that star? Get the answers from mySKY--a fun new astronomy helper from Meade.

PERSEID METEOR SHOWER: The Perseid meteor shower peaked this morning, Aug. 13th, and by most accounts it was a good show. Meteor rates were lower than expected, but in recompense the display was spiced with many bright fireballs.

"This bright Perseid competed with the twilight of dawn as the meteor zipped along the Milky Way towards the bright star Altair," reports photographer Thad V'Soske in Grand Valley, Colorado:


Photo details: Canon 20D, ISO3200, 45-sec, 5:05am.

The shower is subsiding now, but it is not over yet. Tonight sky watchers can expect to see a continued drizzle of meteors, perhaps one-third as many as during the weekend. Stay tuned for updates and more photos.

2007 Perseid Meteor Gallery
[observing tips] [sky map]

ARACHNID METEOR SHOWER: This weekend in San Francisco, Mila Zinkova photographed a very strange meteor cutting through the branches of a tree. It wasn't a Perseid. Zooming out reveals the true nature of this Arachnid meteor:

"It's a spider's web," says Zinkova: click here. Sunlight glinting through the silken strand created a pseudo-meteor in the shadows of the tree. "It's been so foggy here in San Francisco lately, this may be the only meteor I see this month!"

Readers, whenever you see a spider web in sunlight, pause to look. Arachnid meteors are just one of the many things you might see.


.2007 Noctilucent Cloud Gallery
[Night-Sky Cameras] ["Noctilucent Cloud"--the song]

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 August 13, 2007 there were 875 potentially hazardous asteroids.
July 2007 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2007 FV42
July 2
53 LD
15
1.2 km
2007 MB4
July 4
7.6 LD
16
130 m
2007 DT103
July 29
9.3 LD
15
550 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 Links
NOAA Space Environment Center
  The official U.S. government bureau for real-time monitoring of solar and geophysical events, research in solar-terrestrial physics, and forecasting solar and geophysical disturbances.
Atmospheric Optics
  The first place to look for information about sundogs, pillars, rainbows and related phenomena.
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
  more links...
©2007, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
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