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Solar wind
speed: 333.3 km/sec
density: 14.9 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: B5
2212 UT Feb27
24-hr: B8
0332 UT Feb27
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 27 Feb 13
Sunspot AR1682 has a 'beta-gamma' magnetic field that harbors energy for M-class flares. Credit: SDO/HMI
Sunspot number: 49
What is the sunspot number?
Updated 27 Feb 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
27 Feb 2013

The Radio Sun
10.7 cm flux: 99 sfu
explanation | more data
Updated 27 Feb 2013

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 1
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 4.9 nT
Bz: 1.6 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 27 Feb 13
Solar wind flowing from this coronal hole should reach Earth on March 2-3. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2013 Feb 27 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
10 %
10 %
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 Feb 27 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
25 %
MINOR
01 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
15 %
20 %
SEVERE
10 %
20 %
 
Wednesday, Feb. 27, 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

CHANCE OF EARTH-DIRECTED FLARES: Sunspot AR1682 has a 'beta-gamma' magnetic field that harbors energy for M-class solar flares. Because the sunspot is squarely facing Earth, any eruptions today would be geoeffective. NOAA forecasters estimate a 15% chance of M-flares. Solar flare alerts: text, voice.

JUPITER-SIZED HOLE: A magnetic filament curling around the sun's southwestern limb erupted during the early hours of Feb. 27th. As it flew away, it formed a loop of plasma big enough to pass the entire planet Jupiter. (Croquette anyone?) Click on the image to set the scene in motion:

This eruption brings to an end a stunningly beautiful prominence that amateur astronomers had been monitoring for days. Hopefully, they'll continue looking because a new prominence appears to be forming from the debris. Check the realtime gallery for new images.

Realtime Space Weather Photo Gallery

COMET PAN-STARRS UPDATE: Comet Pan-STARRS is brightening as it plunges toward the sun just outside the orbit of Mercury. Amateur astronomer Ian Cooper sends this report from Glen Oroua, New Zealand: "Despite lingering evening twilight and the glare from a nearly full Moon, Comet Pan-STARRS is a 3rd-magnitude object with a fine orange dust tail visible in both binoculars and small telescopes." A 30-second exposure with his Canon 450D digital camera easily revealed the comet:

In early March, the comet will pass about 100 million miles from Earth as it briefly dips inside the orbit of Mercury. At that time it is expected to brighten another two- or three-fold. Whether Pan-STARRS will be visible to the naked eye through the glow of the nearby sun remains to be seen; this NASA video explores the possibilities. Whatever happens, northern hemisphere observers will have a front row seat as the comet crosses the celestial equator before the middle of March. Stay tuned!

More about Comet Pan-STARRS: 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 February 27, 2013 there were 1381 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2013 CZ87
Feb 19
7 LD
28 m
2013 DS9
Feb 24
8.7 LD
24 m
2009 AV
Feb 25
59.7 LD
1.0 km
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
1998 QE2
May 31
15.2 LD
2.2 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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