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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 349.9 km/sec
density: 0.7 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: M1
2040 UT Nov04
24-hr: X2
2027 UT Nov03
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 04 Nov 11
Sunspot 1339 poses a growing threat for X-class solar flares. Credit: SDO/HMI
Sunspot number: 161
What is the sunspot number?
Updated 02 Nov 2011

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

Updated 02 Nov 2011


The Radio Sun
10.7 cm flux: 154 sfu
explanation | more data
Updated 02 Nov 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= 1
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 7.7 nT
Bz: 3.3 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 04 Nov 11
There are no large coronal holes on the Earthside of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2011 Nov 04 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
65 %
65 %
CLASS X
10 %
10 %
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 Nov 04 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
15 %
MINOR
05 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
25 %
20 %
MINOR
15 %
10 %
SEVERE
05 %
01 %
 
Friday, Nov. 4, 2011
What's up in space
 

Metallic photos of the sun by renowned photographer Greg Piepol bring together the best of art and science. Buy one or a whole set. They make a stellar gift.

 
Metallic pictures of the Sun

CHANCE OF FLARES: NOAA forecasters have upgraded the chance of X-class solar flares today to 20%. The source would be AR1339, one of the biggest sunspots in many years. The active region rotated over the sun's eastern limb two days ago and now it is turning toward Earth. Solar flare alerts: text, voice.

The sunspot has already unleashed one X-flare on Nov. 3rd around 2027 UT. A movie from NASA's Solar Dynamics Observatory shows the extreme ultraviolet flash:

The flare created waves of ionization in Earth's upper atmosphere, altering the normal propagation of radio waves over Europe and the Americas. In Ireland, the flare's effect was felt even after dark.

A cloud of plasma or "CME" raced away from the blast site at 1100 km/s. The CME is not heading for Earth. It is, however, heading for Mercury and Venus. Click on the arrow to view a movie of the CME's forecast track:

Analysts at the Goddard Space Weather Lab say the CME will hit Mercury on Nov. 4th around 16:14 UT. NASA's MESSENGER probe in orbit around Mercury will be monitoring the effects of the impact. If the CME overwhelms Mercury's relatively weak magnetic field, it could scour material off the planet's surface creating a temporary atmosphere and adding material to Mercury's comet-like tail. The CME should hit Venus on Nov. 5th; the gossamer cloud will probably break harmlessly against the top of planet's ultra-dense atmosphere.


October 2011 Aurora Gallery
[previous Octobers: 2010, 2009, 2008, 2007, 2006, 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 November 4, 2011 there were 1256 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2011 UX255
Oct 28
0.4 LD
--
15 m
2011 FZ2
Nov 7
75.9 LD
--
1.6 km
2005 YU55
Nov 8
0.8 LD
--
200 m
2011 UT91
Nov 15
9.9 LD
--
109 m
1994 CK1
Nov 16
68.8 LD
--
1.5 km
1996 FG3
Nov 23
39.5 LD
--
1.1 km
2003 WM7
Dec 9
47.6 LD
--
1.6 km
1999 XP35
Dec 20
77.5 LD
--
1.0 km
2000 YA
Dec 26
2.9 LD
--
80 m
2011 SL102
Dec 28
75.9 LD
--
1.1 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
Science Central
Trade Show Displays
   
  more links...
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