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Solar wind
speed: 340.6 km/sec
density: 3.7 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: C1
2044 UT Mar05
24-hr: M1
0754 UT Mar05
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 05 Mar 13
Sunspot AR1686 poses a growing threat for M-class solar flares. Credit: SDO/HMI
Sunspot number: 103
What is the sunspot number?
Updated 05 Mar 2013

Spotless Days
Current Stretch: 0 days
2013 total: 0 days (0%)
2012 total: 0 days (0%)
2011 total: 2 days (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
Since 2004: 821 days
Typical Solar Min: 486 days

Update
05 Mar 2013

The Radio Sun
10.7 cm flux: 114 sfu
explanation | more data
Updated 05 Mar 2013

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: 3.8 nT
Bz: 1.9 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 04 Mar 13
Solar wind flowing from the indicated coronal hole should reach Earth on March 7-8. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2013 Mar 05 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
30 %
30 %
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: 2013 Mar 05 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
25 %
25 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
30 %
30 %
SEVERE
30 %
30 %
 
Tuesday, Mar. 5, 2013
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

SOLAR ACTIVITY INCREASES: Both sides of the sun are active today. On the farside, an explosion commencing around 0400 UT hurled a massive CME into space. On the Earthside, sunspot AR1686 unleashed an M1-class solar flare at 0754 UT: movie. This uptick in global solar activity could herald a period of stormier space weather in the days ahead. Stay tuned. Solar flare alerts: text, voice.

FARSIDE EXPLOSION: An active region on the farside of the sun exploded during the early hours of March 5th, hurling a bright CME into space. Cameras onboard the Solar and Heliospheric Observatory (SOHO) recorded the expanding cloud:

NASA's STEREO-Behind spacecraft is stationed over the farside of the sun, directly above the blast site. An extreme UV telescope onboard the spacecraft recorded a movie of the explosion. The responsible active region will rotate onto the Earthside of the sun in less than a week, which means geoeffective solar activity is in the offing. Solar flare alerts: text, voice.

Realtime Space Weather Photo Gallery

COMET PAN-STARRS AT SUNSET: Observers in the southern hemisphere are getting a good view of Comet Pan-STARRS (C/2011 L4). It appears in the western sky just after sunset, an easy target for the naked eye and a wonderful sight through binoculars or a small telescope. Kosma Coronaios sends this picture, which approximates the naked-eye view, from Limpopo Province, South Africa:

"PanSTARRS was a beautiful sight over the South African bushveldt once again," says Coronaios. "Only a few more days left before it will disappear for us and become a northern hemisphere target. "

Several important dates are approaching. On March 10th, Comet Pan-STARRS makes its closest approach to the sun (0.3 AU). At that time, solar glare might make it difficult to see even as the nucleus vaporizes and brightens. O March 12th and 13th, the comet will reappear in the sunset sky--this time in the northern hemisphere not far from the crescent Moon; think photo-op! Light curves suggest that the comet's brightness will peak near 2nd magnitude, similar to the stars of the Big Dipper. Check the realtime comet gallery for the latest images.

More about Comet Pan-STARRS: NASA video, 3D orbit, ephemeris, light curves.

Realtime Comet Photo Gallery


Realtime Aurora Photo Gallery


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

  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 5, 2013 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2013 DS9
Feb 24
8.7 LD
24 m
2009 AV
Feb 25
59.7 LD
1.0 km
2013 EB
Feb 28
1 LD
16 m
2013 EC
Mar 4
1 LD
12 m
2013 ET
Mar 9
2.5 LD
102 m
2007 EO88
Mar 18
4.4 LD
23 m
1993 UC
Mar 20
49 LD
3.8 km
1997 AP10
Mar 28
45.9 LD
1.8 km
2010 GM23
Apr 13
3.9 LD
50 m
2005 NZ6
Apr 29
24.9 LD
1.3 km
2001 DQ8
Apr 30
74.3 LD
1.1 km
2004 BV102
May 25
69.9 LD
1.4 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
Space Weather Alerts
   
  more links...
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