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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 395.6 km/sec
density: 0.2 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: B9
1713 UT Mar25
24-hr: C1
0042 UT Mar25
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 25 Mar 11
Big sunspot 1176 has a beta-gamma magnetic field that harbors energy for M-class solar flares. . Credit: SDO/HMI
Sunspot number: 73
What is the sunspot number?
Updated 24 Mar 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 24 Mar 2011


The Radio Sun
10.7 cm flux: 108 sfu
explanation | more data
Updated 24 Mar 2011

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 4.0 nT
Bz: 1.3 nT north
explanation | more data
Updated: Today at 2345 UT
Coronal Holes: 25 Mar 11
There are no large coronal holes on the Earth-side of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2011 Mar 25 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
40 %
40 %
CLASS X
05 %
05 %
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 Mar 25 2200 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 %
 
Friday, Mar. 25, 2011
What's up in space
 

Are we alone? Your iPhone has the answer. Download the all-new Drake Equation app to calculate the population of the Milky Way.

 
DrakeEQ for iPhone and iPad

NORTHERN LIGHTS VIDEO: Oh to be in Norway! Norwegian photographer Ole C. Salomonsen has sorted through more than 50,000 images of the aurora borealis he took during the past six months and assembled the best ones to create a must-see video entitled Land of the Northern Lights. Click here to watch--and then call your travel agent.

SECRET SPACE PLANE: One of the stars in this image is a classified spacecraft. Click on the arrow to set the secret space plane in motion:

Kevin Fetter of Brockville, Ontario, made the video on March 24th. It shows the US Air Force's X37-B mini-shuttle gliding by the binary star eta Serpentis. The X37-B and the star are both about 3rd magnitude, easily seen with the naked eye.

The X-37B is on a classified mission, and its orbit has not been published by the US government. Nevertheless, we know where it is. Fetter and other satellite observers have spotted the spacecraft on several occasions, allowing an orbit to be calculated. This means you can see it, too. Click here to turn your cell phone into a field-tested secret space plane tracker.

A RAINBOW AT NIGHT: Recipe for a rainbow: Add bright sunlight to raindrops and voila!--a beautiful band of multi-colors arcs across the sky. With such an ingredient list, you might suppose that rainbows can only be seen during the day, yet last night Ethan Tweedie of Kamuela, Hawaii, recorded this spectacular example long after dark:

"It was a moonbow," explains Tweedie. The bright moon played the role of sun, illuminating nightime raindrops falling through the damp Hawaiian air. "I've been trying to photograph a moonbow for a long time. Last night I was driving back from the Volcano there it was!"

Tweedie's long exposure revealed something even more rare: a secondary moonbow. It's the faint 'bow arciing above the brighter primary. Primary rainbows are caused by single reflections inside raindrops; secondary bows are caused by double reflections. It was a night to remember, indeed.


March 2011 Aurora Photo Gallery
[previous Marches: 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002]

  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 March 25, 2011 there were 1215 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2011 BE38
Apr 10
48 LD
--
1.0 km
2002 DB4
Apr 15
62.5 LD
--
2.2 km
2008 UC202
Apr 27
8.9 LD
--
10 m
2009 UK20
May 2
8.6 LD
--
23 m
2008 FU6
May 5
75.5 LD
--
1.2 km
2003 YT1
May 5
65.3 LD
--
2.5 km
2002 JC
Jun 1
57.5 LD
--
1.6 km
2009 BD
Jun 2
0.9 LD
--
9 m
2002 JB9
Jun 11
71.5 LD
--
3.2 km
2001 VH75
Jun 12
42.2 LD
--
1.1 km
2004 LO2
Jun 15
9.9 LD
--
48 m
2001 QP181
Jul 2
35.1 LD
--
1.1 km
2003 YS117
Jul 14
73.9 LD
--
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
Heliophysics
  the underlying science of space weather
Conquest Graphics
  for out-of-this-world printing and graphics
Science Central
   
  more links...
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