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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: 439.9 km/sec
density: 4.6 protons/cm3
explanation | more data
Updated: Today at 2346 UT
X-ray Solar Flares
6-hr max: B2
2210 UT Jul25
24-hr: B2
2210 UT Jul25
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 25 Jul 10
Sunspot 1089 is large but quiet, producing little solar flare activity. Credit: SOHO/MDI

more images: from Wouter Verhesen of Sittard, The Netherlands; from Gianluca Valentini of Rimini, Italy; from Philippe Roucheux of Joigny, Bourgogne, France; from John Nassr of Baguio, Philippines
Sunspot number: 41
What is the sunspot number?
Updated 24 July 2010

Spotless Days
Current Stretch: 0 days
2010 total: 35 days (17%)
2009 total: 260 days (71%)
Since 2004: 803 days
Typical Solar Min: 486 days
explanation | more info
Updated 24 July 2010


The Radio Sun
10.7 cm flux: 85 sfu
explanation | more data
Updated 24 July 2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 3
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 5.4 nT
Bz: 0.3 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole should reach Earth later today. Credit: SDO/AIA
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Jul 25 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 Jul 25 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
25 %
MINOR
05 %
10 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
30 %
MINOR
05 %
15 %
SEVERE
01 %
05 %
What's up in Space
July 25, 2010

ANDROID FLYBYS: Our field-tested satellite tracker is now available for Android phones. Features: Global predictions and flyby alarms! Learn more.

 

SUNSET PLANETS: Mars and Saturn are converging with Venus to form a skinny triangle in the sunset sky. When the sun sets tonight, go outside and look west. Venus pops out of the twilight first, followed by Saturn, then Mars. Dates of note include July 30th and 31st when Saturn and Mars are only 2o apart. Sky maps: July 25, 26, 27, 28, 29, 30, 31.

THUNDER MOON: Picture this: You step outside on a warm summer evening. In the distance, a stroke of lightning lunges to Earth. One-one-thousand, two-one-thousand, three-one-thousand. The air shakes with thunder and, at that moment, the clouds part to reveal a brilliant full Moon. Too good to be true? It could happen tonight. According to folklore, tonight's full Moon is the "Thunder Moon", named after the storms of summer. Step outside and see what happens!

Arnel C. Manlises sends this picture of moonlit thunderclouds from the Philippines:

"The scene was breathtaking," says Manlises. "Majestic clouds reached up to the Moon while the silhouette of a solitary boat headed out to sea in calm waters." Click here for the complete picture.

more images: from Stuart Atkinson of Kendal, Cumbria, UK

SUNSPOT 1089: The two dark cores of sunspot 1089 are each larger than Earth, and the whole region is criss-crossed by dark magnetic filaments. It's a photogenic ensemble:

"I like how the sunspots of new Solar Cycle 24 continue to get bigger and more complex as the cycle unfolds," says photographer Micheal Borman of Evansville, Indiana. "This picture was taken with my Televue 102iis refractor and a Coronado SM90 solar filter."

Although sunspot 1089 is big, it has not yet produced any flares of consequence. Perhaps it is gathering energy for a good eruption. Readers with solar telescopes are encouraged to monitor developments.

more images: from John Stetson of South Portland, Maine; from Peter Paice of Belfast,Northern Ireland; from Cai-Uso Wohler of Bispingen, Germany; from Peter Desypris of Island of Syros Greece;


Solar Eclipse Photo Gallery
[NASA: South Pacific Eclipse] [animated map]

 
       
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 25, 2010 there were 1140 potentially hazardous asteroids.
Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
1999 JD6
Jul 27
53.9 LD
17
1.8 km
2010 KZ117
Aug 4
72.6 LD
18
1.0 km
6239 Minos
Aug 10
38.3 LD
18
1.1 km
2005 NZ6
Aug 14
60.5 LD
18
1.3 km
2002 CY46
Sep 2
63.8 LD
16
2.4 km
2010 LY63
Sep 7
56.1 LD
18
1.3 km
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
2.0 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
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 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 and Heliospheric Observatory
  Realtime and archival images of the Sun from SOHO.
STEREO
  3D views of the sun from NASA's Solar and Terrestrial Relations Observatory
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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