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Solar wind
speed: 337.7 km/sec
density: 0.8 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: C1
1701 UT Nov24
24-hr: C4
0752 UT Nov24
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 24 Nov 13
Sunspots AR1904 and AR1905 have 'beta-gamma' magnetic fields that harbor energy for M-class solar flares. Neither sunspot, however, is facing Earth. Credit: SDO/HMI
Sunspot number: 65
What is the sunspot number?
Updated 24 Nov 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

24 Nov 2013

The Radio Sun
10.7 cm flux: 143 sfu
explanation | more data
Updated 24 Nov 2013

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 1
explanation | more data
Interplanetary Mag. Field
Btotal: 3.3 nT
Bz: 1.8 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 24 Nov 13
There are no large 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: 11-24-2013 12:55:02
NOAA Forecasts
Updated at: 2013 Nov 24 2200 UTC
0-24 hr
24-48 hr
25 %
25 %
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: 2013 Nov 24 2200 UTC
0-24 hr
24-48 hr
10 %
15 %
01 %
05 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
20 %
25 %
20 %
25 %
Sunday, Nov. 24, 2013
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

WHAT HAPPENS IF A SOLAR STORM HITS COMET ISON? On Nov. 28th, Thanksgiving Day in the USA, Comet ISON will swoop through the sun's atmosphere little more than a million kilometers above the sun's fiery surface. What might happen if, at that moment, Comet ISON gets hit by a solar storm? Experts discuss the answer in today's story from Science@NASA. Solar flare alerts: text, voice

COMET ISON, PARTING SHOTS: As Comet ISON approaches the sun, it is becoming increasingly difficult for observers on Earth to photograph the comet. Indeed, by Nov. 24th it seemed impossible. But it only seemed that way. Working from a high-altitude site in the Canary islands, Juan Carlos Casado successfully imaged Comet ISON on Sunday morning deep inside the rosy glow of dawn:

"I took this picture of Comet ISON on Nov. 24th at 6: 25 UT from the Teide Observatory," says Casado. "The comet was over the distant island of Gran Canaria above a sea of clouds about 1 hour before sunrise and only 16° from the sun. The exceptional atmospheric conditions of Teide Observatory allowed me to capture the image."

Could this be the last clear photo of Comet ISON taken from Earth? No one knows. Stay tuned to the realtime photo gallery for more parting shots:

Realtime Comet ISON Photo Gallery

COMETS IN THE SOLAR WIND: NASA's STEREO-A spacecraft is monitoring Comet ISON as it approaches the sun. The latest movie from the spacecraft's Heliospheric Imager captures not only Comet ISON but also Earth, Mercury, and Comet Encke. Click to set the scene in motion:

In the movie, which spans a two+ day period from Nov. 20 to Nov. 22, the sun is to the right, off-screen. "The dark 'clouds' coming from that direction are density enhancements in the solar wind, and these are what are causing the ripples you see in the comet tails," explains Karl Battams of NASA's Comet ISON Observing Campaign.

Although the two comets seem to be experiencing the same solar wind, their tails ripple differently. "Encke has kind of long waves in the tail, whereas ISON's seems almost like high-frequency puffs," points out Battams.

Appearances notwithstanding, the two comets might be in two different streams. "The most likely explanation is that ISON is in a faster stream of solar wind," he continues. "Imagine holding a flag on a slightly breezy day. The flag will waft gently in the breeze. Now imagine holding it in really strong winds. The flag will be rippling violently, but those ripples will be smaller in amplitude."

Battams also suggests a second, more speculative possibility for the difference. You can read about it here. And stay tuned for more images from NASA's solar fleet.

Realtime Comet ISON Photo Gallery

Realtime Space Weather 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 Nov. 23, 2013, the network reported 6 fireballs.
(6 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 November 24, 2013 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2001 AV43
Nov 18
3 LD
52 m
2013 VK13
Nov 19
8.1 LD
26 m
2010 CL19
Nov 25
37.6 LD
1.3 km
2013 NJ
Nov 26
2.5 LD
190 m
2011 YD29
Dec 28
6.1 LD
24 m
2007 SJ
Jan 21
18.9 LD
1.9 km
2012 BX34
Jan 28
9.6 LD
13 m
2006 DP14
Feb 10
6.2 LD
730 m
2000 EM26
Feb 18
8.8 LD
195 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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