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Solar wind
speed: 361.2 km/sec
density: 2.7 protons/cm3
explanation | more data
Updated: Today at 2343 UT
X-ray Solar Flares
6-hr max: C1
2253 UT Sep06
24-hr: C1
2253 UT Sep06
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 06 Sep 13
The Earthside of the sun is quiet. Solar activity is low. Credit: SDO/HMI
Sunspot number: 75
What is the sunspot number?
Updated 06 Sep 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

06 Sep 2013

The Radio Sun
10.7 cm flux: 110 sfu
explanation | more data
Updated 06 Sep 2013

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 2
explanation | more data
Interplanetary Mag. Field
Btotal: 4.6 nT
Bz: 0.9 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 06 Sep 13
There are no large equatorial coronal holes on the Earthside of the sun.Credit: SDO/AIA. is now posting daily satellite images of noctilucent clouds (NLCs), which hover over Earth's poles at the edge of space. The data come from NASA's AIM spacecraft. The north polar "daisy" pictured below is a composite of near-realtime images from AIM assembled by researchers at the University of Colorado's Laboratory for Atmospheric and Space Physics (LASP).
Noctilucent Clouds
Switch view: Europe, USA, Asia, Polar
Updated at: 09-02-2013 11:55:02
NOAA Forecasts
Updated at: 2013 Sep 06 2200 UTC
0-24 hr
24-48 hr
05 %
05 %
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 Sep 06 2200 UTC
0-24 hr
24-48 hr
10 %
10 %
01 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
15 %
15 %
10 %
10 %
Friday, Sep. 6, 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

QUIET SUNSPOTS: All of the sunspots on the Earthside of the sun are stable and quiet. NOAA forecasters estimate a slight 5% chance of M-class solar flares and no more than a 1% chance of X-class flares on Sept. 6th. Solar flare alerts: text, voice.

MOON ROCKET LAUNCH TONIGHT: Tonight, Sept. 6th at approximately 11:27 p.m. EDT, a Minataur V rocket carrying NASA's LADEE moon probe will blast off from the Wallops Flight Facility in Virginia. Sky watchers along a broad swath of the US east coast from Maine to the Carolinas can see the launch. Orbital Sciences Corp. prepared this visibility map:

In most locations, the ascending rocket won't climb much more than 10° to 15° above the horizon, although areas around the launch site will fare better. Orbital Sciences' prediction page lays out the details of when and which way to look.

The launch will kick off LADEE's mission to investigate the Moon's surprising atmosphere. Yes, the "airless Moon" has an atmosphere. It is ten thousand billion times thinner than Earth's, but nevertheless there. Apollo astronauts actually saw it with their own eyes.

LADEE, short for "Lunar Atmosphere and Dust Environment Explorer," will circle the Moon on a 100 day mission to assay the lunar atmosphere. Instruments onboard the spacecraft will look for signs of humidity, electrified dust, and atoms hopping across the lunar surface. A NASA video about LADEE previews the mission.

Photographers, if you catch LADEE blasting off, submit your images here.

Realtime Space Weather Photo Gallery

SOLAR ECLIPSE: Twice every year, around the time of the equinoxes, Earth can pass directly between the Sun and NASA's Solar Dynamics Observatory (SDO), producing a series of beautiful eclipses from the point of view of the spacecraft. SDO's autumnal eclipse season began this week, producing a partial blackout of the sun:

During the eclipse, which was centered around 0658 UT on Sept. 2nd, Earth covered about half of the sun. Because these eclipses typically last for only minutes each day (maximum=72 minutes), there is still plenty of uninterrupted time for SDO to monitor activity on the sun. The ongoing eclipse season will end on Sept. 25th. Between now and then, stay tuned for some rare blackouts.

Realtime Space Weather Photo Gallery

Realtime Aurora Photo Gallery

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

Realtime Comet Photo Gallery

  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 6, 2013 there were 1424 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2013 RG
Sep 3
0.6 LD
6 m
2013 RZ5
Sep 4
1.1 LD
10 m
2013 QE16
Sep 5
8.2 LD
22 m
2013 RQ5
Sep 6
4.8 LD
27 m
2000 DK79
Nov 10
49.1 LD
3.2 km
2011 JY1
Nov 13
8.2 LD
57 m
2001 AV43
Nov 18
2.9 LD
58 m
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.
  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
  the underlying science of space weather
Space Weather Alerts
  more links...
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