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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: 444.5 km/sec
density: 5.6 protons/cm3
explanation | more data
Updated: Today at 2245 UT
X-ray Solar Flares
6-hr max: A0
1910 UT Jul03
24-hr: A0
0025 UT Jul03
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 03 July 07
Sunspot 961 poses no threat for strong solar flares. Credit: SOHO/MDI
Sunspot number: 13
What is the sunspot number?
Updated 01 July 2007
Far side of the Sun:
This holographic image reveals no large sunspots on the farside of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 3
quiet
explanation | more data
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Updated: 2007 Jul 03 2132 UT
Interplanetary Mag. Field
Btotal: 4.1 nT
Bz: 2.6 nT north
explanation | more data
Updated:Today at 2246 UT
Coronal Holes:
A minor solar wind stream flowing from the indicated coronal hole might reach Earth on July 4th or 5th. Credit: SOHO Extreme Ultraviolet Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2007 Jul 03 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 Jul 03 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
10 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
15 %
MINOR
10 %
05 %
SEVERE
01 %
01 %
What's up in Space
July 3, 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.

GENESIS II: Bigelow Aerospace has launched another inflatable satellite: Genesis II. Believe it or not, the 4.4-meter wide balloon is a prototype module for a space hotel. On July 1st, satellite observer Kevin Fetter photographed Genesis II gliding past the bright star Vega: video. "Genesis was about as bright as a 3rd magnitude star--easily visible to the unaided eye," says Fetter.

Would you like a call when Genesis II flies over your hometown? Sign up for Spaceweather PHONE.

SUNSPOT 961: At first glance, sunspot 961 looks featureless and bland. But an H-alpha filter tuned to the red glow of solar hydrogen reveals something quite different--a bright spiral emerging from the sunspot's dark core. This picture comes from C. LaCroix, R. Enriquez and John Stetson of South Portland, Maine:

The spiral traces a ridge of north magnetic flux into the sunspot's south magnetic core. What makes the spiral so hot and bright? It may be a region where hot gas is bottled-up by magnetic forces--or maybe it is an arc of intense magnetic turbulence--or something else. Certainly, it is not entirely stable: Note the changes from June 30th to July 2nd. Amateur astronomers with solar telescopes should keep an eye on sunspot 961.

more images: from Rogerio Marcon of Campinas - Brazil; from Mike Taormina of Palatine, Illinois; from Emiel Veldhuis of Zwolle, the Netherlands; from Mike Strieber of Las Vegas, NV; from Franck Charlier of Marines, Val d'Oise - France; from Cai-Uso Wohler of Bispingen, Germany; a pastel sketch from Erika Rix of Zanesville, Ohio; from Enrico Perissinotto of Premariacco (UD) Italy; from Britta Suhre of Dortmund, Germany.

NOCTILUCENT NEPHELOCOCCYGIA: Look into a cloud and what do you see? A flying elephant? A mouse? A dragon? Finding shapes in clouds is called nephelococcygia (refs: #1, #2). Last night in Lithuania, photographer Donatas Tamonis conducted noctilucent nephelococcygia. "This bright noctilucent cloud reminded me of a giant squid," he says. (continued below)

"Clouds often take various shapes that remind us of something. Noctilucent clouds are no exception." Browse the gallery and decide for yourself:

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

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 3, 2007 there were 874 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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