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Solar wind
speed: 274.4 km/sec
density: 4.0 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: C1
2052 UT Jul06
24-hr: C4
0025 UT Jul06
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 06 Jul 14
Big sunspots AR2104, AR2107, AR2108 and AR2109 all have "beta-gamma" magnetic fields that harbor energy for M-class solar flares. Credit: SDO/HMI
Sunspot number: 213
What is the sunspot number?
Updated 06 Jul 2014

Spotless Days
Current Stretch: 0 days
2014 total: 0 days (0%)
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%)

06 Jul 2014

The Radio Sun
10.7 cm flux: 188 sfu
explanation | more data
Updated 06 Jul 2014

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
explanation | more data
Interplanetary Mag. Field
Btotal: 5.0 nT
Bz: 4.8 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 06 Jul 14
A stream of solar wind flowing from this minor coronal hole should reach Earth on July 9-10..Credit: SDO/AIA. posts 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: 07-06-2014 10:55:05
NOAA Forecasts
Updated at: 2014 Jul 06 2200 UTC
0-24 hr
24-48 hr
60 %
60 %
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: 2014 Jul 06 2200 UTC
0-24 hr
24-48 hr
05 %
05 %
01 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
15 %
15 %
05 %
05 %
Sunday, Jul. 6, 2014
What's up in space

Listen to radar echoes from satellites and meteors, live on listener-supported Space Weather Radio.

Spaceweather Radio is on the air

MOSTLY QUIET WITH A CHANCE OF FLARES: Solar activity is low. However, there are four sunspots facing Earth that pose a threat for geoeffective flares: AR2104, AR2107, AR2108, AR2109. NOAA forecasters estimate a 60% chance that one of those active regions will produce an M-flare during the 4th of July weekend. Solar flare alerts: text, voice

SPACE STATION TRANSITS THE SUN: As wide as a World Cup football field, the biggest spacecraft ever built makes a impressive silhouette when it passes in front of the sun. Yesterday, Maximilian Teodorescu of Romania caught the winged shadow of the International Space Station in conjuncton with sunspots AR2104 and AR2107:

"This is my first attempt to catch the station with a small-sensor camera at high magnification," he says. "I managed to catch the ISS in three frames."

His wife Eliza was right beside him with her own camera and solar filter, and she caught it too. "The moment was all the more spectacular because the ISS path was almost parallel to the very numerous string of sunspots," she notes. One conjunction after another unfolded as their cameras rolled.

With the sunspot number so high, now is a good time to catch ISS-sunspot conjunctions. Check Calsky for local transit predictions.

Realtime Space Weather Photo Gallery

MONSTER ASTEROIDS CONVERGE: The two most massive objects in the asteroid belt, dwarf planet Ceres and minor planet Vesta, are converging for a close encounter in the night sky on July 4th and 5th. Last night in Italy, Gianluca Masi used a remotely operated telescope to photograph the monster asteroids only 13 arcminutes apart--less than half the width of a full Moon. The line splitting the two is a terrestrial satellite:

At closest approach on July 5th, the two asteroids will be only 10 arcminutes apart in the constellation Virgo. They are too dim to see with the unaided eye, but easy targets for binoculars and small telescopes. Observing tips are available from Sky and Telescope.

Got clouds? You can watch the close encounter online. Choose between Gianluca Masi's Virtual Telescope Project (which begins July 5th at 4:00 p.m. EDT) or Slooh's webcast (July 3rd at 8 p.m. Eastern Daylight Time).

Quite near the two asteroids on the sky, though utterly invisible, is NASA's Dawn spacecraft. Dawn recently finished visiting Vesta and is now en route to Ceres. The ion-propelled spacecraft will enter orbit around Ceres next March. Cameras on Dawn will resolve the pinprick of light you see this weekend into a full-fledged world of unknown wonders. Stay tuned for that!

Realtime NLC Photo Gallery

Realtime Comet Photo Gallery

Realtime Aurora Photo Gallery

  All Sky Fireball Network

Every night, a network of NASA all-sky cameras scans the skies above the United States for meteoritic fireballs. Automated software maintained by NASA's Meteoroid Environment Office calculates their orbits, velocity, penetration depth in Earth's atmosphere and many other characteristics. Daily results are presented here on

On Jul. 6, 2014, the network reported 9 fireballs.
( 9 sporadics)

In this diagram of the inner solar system, all of the fireball orbits intersect at a single point--Earth. The orbits are color-coded by velocity, from slow (red) to fast (blue). [Larger image] [movies]

  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 July 6, 2014 there were 1489 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2014 MV18
Jun 30
7.2 LD
80 m
2014 MJ26
Jul 2
9.7 LD
47 m
2013 AG69
Jul 8
2.7 LD
15 m
2014 MF6
Jul 9
9.1 LD
305 m
2011 PU1
Jul 17
7.9 LD
43 m
2002 JN97
Aug 2
61.4 LD
2.0 km
2001 RZ11
Aug 17
34.2 LD
2.2 km
2013 WT67
Aug 17
16.1 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.
  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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