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Solar wind
speed: 575.6 km/sec
density: 2.9 protons/cm3
explanation | more data
Updated: Today at 2346 UT
X-ray Solar Flares
6-hr max: C2
1653 UT Feb10
24-hr: C3
0514 UT Feb10
explanation | more data
Updated: Today at: 2229 UT
Daily Sun: 10 Feb 14
Sunspots AR1974, AR1975 and AR1976 have 'beta-gamma' magnetic fields that harbor energy for M-class solar flares. Credit: SDO/HMI
Sunspot number: 180
What is the sunspot number?
Updated 10 Feb 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%)

10 Feb 2014

The Radio Sun
10.7 cm flux: 169 sfu
explanation | more data
Updated 10 Feb 2014

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 4 unsettled
24-hr max: Kp= 4
explanation | more data
Interplanetary Mag. Field
Btotal: 4.3 nT
Bz: 1.7 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 10 Feb 14
There are no large coronal holes on the Earthside of the sun. 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: 02-10-2014 11:55:02
NOAA Forecasts
Updated at: 2014 Feb 10 2200 UTC
0-24 hr
24-48 hr
30 %
30 %
05 %
05 %
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 Feb 10 2200 UTC
0-24 hr
24-48 hr
15 %
05 %
05 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
25 %
15 %
25 %
05 %
Monday, Feb. 10, 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

EDGE OF SPACE VALENTINE'S CARD: It's heavenly, it's romantic, and most of all it's experimental.  We're talking about an Edge of Space Valentine's Card! If you would like to have a picture of your choice photographed 120,000 feet above Earth's surface, submit your graphic and a $49.95 flight fee today. The student balloonists of Earth to Sky Calculus will fly it to the stratosphere on Feb. 11th.  If all goes as planned, you'll have the photo back in time for Valentine's Day. Money back guarantee if it doesn't work  Email Dr. Tony Phillips for details.

JUPITER AND THE MOON: When the sun goes down tonight, step outside and look up. Jupiter and the gibbous Moon are only 5o apart--tight enough to fit inside the bowl of the Big Dipper. The bright conjunction is easy to see even from light-polluted cities. Take a look!

EMERGING SUNSPOTS: Over the weekend, active sunspots AR1967 and AR1968 rotated off the solar disk. However, the chance of flares has not decreased very much. Three new active regions have popped up to take their place:

The circled sunspots, AR1974 - AR1976, have 'beta-gamma' magnetic fields that harbor energy for medium-sized eruptions. And they are growing. NOAA forecasters estimate a 40% chance of M-class flares and a 5% chance of X-flares on Feb. 10th. Solar flare alerts: text, voice

Realtime Space Weather Photo Gallery

'MAGICAL' ICE HALOS OVER CALGARY: Yesterday, sky watchers around Calgary, Canada, witnessed a magnificent display of ice halos around the sun. "It was magical--the best I've ever seen," reports photographer Dee Cresswell, who needed four exposures to capture all of the glowing arcs:

"The temperature was around -22 C, with a windchill in the mid minus thirties," she continues. "You could actually see the ice crystals shimmering in the air. There was a 22° halo, a 46° halo, infralateral arcs, tangent arcs, circumzenithal arc, a parhelic circle and more."

Atmospheric optics expert Les Cowley created a diagram labeling the halos: click here. He says they were created by a special kind of ice crystal called "diamond dust."

"Diamond dust--that is, low level ice crystals shaped as hexagonal plates and columns--make the very best halos because the crystals are large and of good optical quality," explains Cowley. "Plates made the bright sundogs and the circumzenithal arc while column crystals generated the upper tangent arc and the rarer supralateral and infralateral arcs. More peculiarly oriented columns gave the not often seen Parry arc. A few randomly tilted crystals produced the faint 22-degree halo and only a hint of the 46-degree circle. Supralateral arcs and the rarer 46° halo can be hard to tell apart."

"Even though wintry diamond dust is the king of halos,ordinary ice crystals in high clouds can give fine displays all year long. No matter where you live, or what time of year, keep an eye out for halos."

Realtime Space Weather Photo Gallery

Realtime Aurora Photo Gallery

Realtime Comet 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 Feb. 8, 2014, the network reported 4 fireballs.
(4 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]

On Feb. 5, 2014, the network reported 2 fireballs.
(2 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 February 10, 2014 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2014 BP43
Feb 8
5.5 LD
22 m
2006 DP14
Feb 10
6.2 LD
730 m
2014 BT43
Feb 11
9.8 LD
31 m
2014 CB3
Feb 12
8.8 LD
27 m
2000 EM26
Feb 18
8.8 LD
195 m
2014 BR57
Feb 20
4.4 LD
68 m
2014 CR
Feb 23
8.3 LD
123 m
2000 EE14
Mar 6
64.6 LD
1.8 km
2003 QQ47
Mar 26
49.9 LD
1.4 km
1995 SA
Apr 2
73.1 LD
1.6 km
2000 HD24
Apr 4
42.2 LD
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.
  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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