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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 458.1 km/sec
density: 0.1 protons/cm3
explanation | more data
Updated: Today at 2339 UT
X-ray Solar Flares
6-hr max: A7
1744 UT Nov23
24-hr: B1
0920 UT Nov23
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 23 Nov 10
Sunspot 1127 is slowly decaying and poses no threat for stroong solar flares. Credit: SDO/HMI. 2-day movie: 9 MB mpg
Sunspot number: 23
What is the sunspot number?
Updated 22 Nov 2010

Spotless Days
Current Stretch: 0 days
2010 total: 45 days (14%)
2009 total: 260 days (71%)
Since 2004: 813 days
Typical Solar Min: 486 days

Updated 22 Nov 2010


The Radio Sun
10.7 cm flux: 78 sfu
explanation | more data
Updated 22 Nov 2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 3 quiet
24-hr max: Kp= 3
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 4.8 nT
Bz: 2 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 23 Nov 10
Earth is inside a solar wind stream flowing from the indicated coronal hole. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Nov 23 2200 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 Nov 23 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
05 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
05 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
 
Tuesday, Nov. 23, 2010
What's up in space
 

AURORA ALERTS: Did you miss the Northern Lights? Next time get a wake-up call from Space Weather PHONE

 

AURORA WATCH: High-latitude sky watchers should be alert for auroras. Earth is entering a solar wind stream that could spark geomagnetic activity around the Arctic Circle. Images: from Wim van Caspel of Laukvik, Lofoten, Norway.

PLUMES ON JUPITER: Astronomers are monitoring a cluster of energetic plumes breaking through the cloudtops of Jupiter. Regard the image below. Each of the bright spots is a massive convection cell rising high above the usual cloud deck:

Australian astrophotographer Anthony Wesley took the picture on Nov. 17th using a 16-inch telescope and a 890 nm "methane band" filter. Jupiter's atmosphere is permeated with methane, CH4, a strong absorber of sunlight at 890 nm. That's why the giant planet looks so dark in Wesley's image. The only things bright in the methane band are high-rising hazes and plumes that reflect sunlight before it enters the planet's methane-dark interior.

"When a transient convective plume becomes methane-bright, it means that it is extending exceptionally high above the normal cloud-tops," explains John H. Rogers, director of the British Astronomical Association's Jupiter Section. "What we see on Jupiter now is an exceptionally energetic weather system. It resembles (and may actually be) a gigantic thunderstorm."

If planetary scientists are correct, these plumes are heralds of a much bigger event--the return of Jupiter's South Equatorial Belt, which mysteriously disappeared almost a year ago. Soon, the planet-girdling belt could pop up through the cloudtops like a submarine surfacing from depth. Stay tuned.

STRESS RELIEF: The tension was just too great. On Nov. 21st around 1600 UT, a twisted filament of solar magnetism suddenly untwisted, producing a towering eruption off the sun's northwestern limb. Click on the image to play a 6-hour time lapse movie from the Solar Dynamics Observatory:


Movie formats: 3 MB gif, 1.2 MB iPad, 0.3 MB iPhone, 1 MB hi-res still frame

Earth was not in the line of fire. No geomagnetic storms or auroras are expected as a result of the blast. Moreover, now that the filament has relaxed, it poses little threat for future eruptions. There is, however, another filament that bears watching. Stay tuned for updates.


November 2010 Aurora Gallery
[previous Novembers: 2009, 2008, 2007, 2006, 2004, 2003, 2002, 2001, 2000]

  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 23, 2010 there were 1164 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2010 TQ19
Oct 8
9.6 LD
18
37 m
2010 TS19
Oct 10
3.7 LD
18
31 m
2010 TD54
Oct 12
0.1 LD
14
7 m
2010 TB54
Oct 13
6.1 LD
20
19 m
1999 VO6
Oct 14
34.3 LD
16
1.8 km
2010 TK
Oct 16
4.5 LD
18
37 m
1998 TU3
Oct 17
69.1 LD
13
5.2 km
2010 TG19
Oct 22
1.1 LD
15
70 m
1998 MQ
Oct 23
77.7 LD
15
1.9 km
2007 RU17
Oct 29
39.2 LD
15
1.1 km
2003 UV11
Oct 30
5 LD
12
595 m
3838 Epona
Nov 7
76.8 LD
14
3.4 km
2005 QY151
Nov 16
77.7 LD
17
1.3 km
2008 KT
Nov 23
5.6 LD
21
10 m
2002 EZ16
Nov 30
73.9 LD
16
1.0 km
2000 JH5
Dec 7
47 LD
-
1.5 km
2010 JL33
Dec 9
16.6 LD
13
1.3 km
2008 EA32
Jan 7
76.5 LD
-
2.1 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
   
  more links...
 
 
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