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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 440.0 km/sec
density: 0.3 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: B2
1850 UT Sep29
24-hr: B5
0125 UT Sep29
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 29 Sept 10
Sunspot 1110 is crackling with C-class solar flares. Credit: SDO/HMI. Resolutions: 4096, 1024, 512
Sunspot number: 49
What is the sunspot number?
Updated 28 Sep 2010

Spotless Days
Current Stretch: 0 days
2010 total: 41 days (15%)
2009 total: 260 days (71%)
Since 2004: 809 days
Typical Solar Min: 486 days
explanation | more info
Updated 28 Sep 2010


The Radio Sun
10.7 cm flux: 83 sfu
explanation | more data
Updated 28 Sep 2010

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: 3.1 nT
Bz: 3.1 nT north
explanation | more data
Updated: Today at 2345 UT
Coronal Holes: 29 Sept 10
There are no large coronal holes on the Earth-facing side of the sun. Credit: SDO/AIA
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Sep 29 2201 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
05 %
05 %
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 Sep 29 2201 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 %
 
Wednesday, Sep. 29, 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: A ~500 km/s solar wind stream is buffeting Earth's magnetic field. Sky watchers around the Arctic Circle should be alert for Northern Lights.

latest images: from Jan Koeman of Straumnes, Norway; from Hendro Hioe of Laukvik, Norway

CRACKLING SUNSPOT: During the past 24 hours, sunspot 1110 has increased in size more than 10-fold. A white-light camera onboard NASA's Solar Dynamics Observatory took this picture during the early hours of Sept. 29th:

Although it is still small compared to behemoth sunspot 1109 right behind it, sunspot 1110 is much more active. Reconnection events in the sunspot's magnetic canopy have produced at least two C-class solar flares since yesterday (SDO movies: #1, #2). The eruptions were brief and did not hurl significant clouds of plasma toward Earth. If the sunspot continues to grow, however, future eruptions could become geoeffective.

SPACE STATION-SUNSPOT CONJUNCTION: Sunspot 1109 is so big, it's hard to miss. Yesterday, the International Space Station (ISS) flew right over it:

"I was lucky," says photographer Jesper Sorensen of Copenhagen, Denmark. "The sky was cloudy, but the clouds parted just 20 seconds before the ISS crossed the sun." He recorded the split-second transit using an 80mm refracting telescope (solar filtered!) and a SKYnyx 2-1M digital camera.

Readers, check Calsky for solar transit predictions. You might be able to record a sunspot conjunction of your own.


Sept. 2010 Northern Lights Gallery
[previous Septembers: 2009, 2008, 2007, 2006, 2005, 2004, 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 September 29, 2010 there were 1145 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2009 SH2
Sep 30
7.1 LD
24.9
45 m
1998 UO1
Oct 1
32.1 LD
16.6
2.1 km
2005 GE59
Oct 1
77 LD
18
1.1 km
2001 WN5
Oct 10
41.8 LD
18.2
1.0 km
1999 VO6
Oct 14
34.3 LD
16.9
1.8 km
1998 TU3
Oct 17
69.1 LD
14.6
5.3 km
1998 MQ
Oct 23
77.7 LD
16.7
1.9 km
2007 RU17
Oct 29
40.6 LD
18.1
1.0 km
2003 UV11
Oct 30
5 LD
19.3
595 m
3838 Epona
Nov 7
76.8 LD
15.5
3.4 km
2005 QY151
Nov 16
77.7 LD
17.6
1.3 km
2008 KT
Nov 23
5.6 LD
28.2
10 m
2002 EZ16
Nov 30
73.9 LD
18.2
1.0 km
2000 JH5
Dec 7
47 LD
17.3
1.5 km
2010 JL33
Dec 9
16.6 LD
17.6
1.3 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
Current Solar Images
  from the National Solar Data Analysis Center
Science Central
   
  more links...
 
 
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