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Solar wind
speed: 441.5 km/sec
density: 3.8 protons/cm3
explanation | more data
Updated: Today at 2349 UT
X-ray Solar Flares
6-hr max: C1
1911 UT Dec25
24-hr: C4
1212 UT Dec25
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 25 Dec 14
Not one of these sunspots has the kind of unstable magnetic field that poses a threat for strong flares. Solar activity is low. Credit: SDO/HMI
Sunspot number: 86
What is the sunspot number?
Updated 25 Dec 2014

Spotless Days
Current Stretch: 0 days
2014 total: 1 day (<1%)
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%)

Update 25 Dec
2014

The Radio Sun
10.7 cm flux: 151 sfu
explanation | more data
Updated 25 Dec 2014

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 4 unsettled
24-hr max: Kp= 4
unsettled
explanation | more data
Interplanetary Mag. Field
Btotal: 9.2 nT
Bz: 2.6 nT south
explanation | more data
Updated: Today at 2349 UT
Coronal Holes: 25 Dec 14
There are no large coronal holes on the Earthside of he sun. Credit: SDO/AIA.
Noctilucent Clouds As of Nov. 22, 2014, the season for southern hemisphere noctilucent clouds is underway. The south polar "daisy" pictured below is a composite of near-realtime images from NASA's AIM spacecraft.
Switch view: Ross Ice Shelf, Antarctic Penninsula, East Antarctica, Polar
Updated at: 12-24-2014 13:55:04
SPACE WEATHER
NOAA Forecasts
Updated at: 2014 Dec 25 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
25 %
25 %
CLASS X
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 Dec 25 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
15 %
MINOR
01 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
20 %
MINOR
20 %
25 %
SEVERE
10 %
20 %
 
Thursday, Dec. 25, 2014
What's up in space
 

Learn to photograph Northern Lights like a pro. Sign up for Peter Rosen's Aurora Photo Courses in Abisko National Park.

 
Lapland tours

PEACEFUL SUN: With no sunspots actively flaring, the sun is quiet and solar activity is low. NOAA forecasters estimate a waning 10% chance of X-flares on Christmas Day. Solar flare alerts: text, voice

HOLIDAY LIGHTS: A stream of solar wind is bufeting Earths magnetic field, and this is causing geomagnetic unrest around the poles. Last night around the Arctic Circle, Christmas carolers and last minute gift-givers witnessed a beautiful display of holiday lights:

"Vi var ute og leverte julegaver, bare måtte stoppe litt... 5min ble 5timer....," says aurora tour guide Marianne Bergli, who photographed the display in Tromsø, Norway. "God jul alle sammen." Translated: "We were out delivering Christmas gifts and just had to stop a bit ... 5 minutes became 5 hours. Merry Christmas everyone!"

The show's not over. NOAA forecasters estimate a 35% chance of polar geomagnetic storms on Dec. 25th as the solar wind continues to blow. Browse the gallery for latest images from around the Arctic Circle. Aurora alerts: text, voice

Realtime Aurora Photo Gallery

CHRISTMAS COMET: Is there a cylindrical package under your Christmas tree? Open it now. A small telescope is all you need to see Comet Lovejoy (C/2014 Q2). Discovered just last August by Terry Lovejoy in Australia, the green comet is brightening faster than expected as it moves into northern skies just in time for Christmas. Trace the comet's tail down the page for more information:

Gerald Rhemann took this picture on Dec. 21st using a remotely-operated telescope in Namibia. The comet's sinuous blue ion tail contrasts beautifully with its puffy green atmosphere. The colors come from ionized carbon monoxide (CO+) and diatomic carbon (C2), which glow blue and green, respectively, in the near-vacuum of interplanetary space.

"Last night (Dec. 23rd), the comet was easy to see in binoculars as a 5th magnitude fuzzy star," reports Alan Dyer of New Mexico. "I could just see the comet naked eye knowing exactly where to look south of Orion in the constellation Columba the dove."

Where is that? These finder charts from Sky and Telescope can help you find the comet. Better yet, if that cylindrical object is a GOTO telescope, just plug in the comet's coordinates and let the telecope find it for you.

Realtime Comet Photo Gallery


Realtime Space Weather 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 Spaceweather.com.

On Dec. 25, 2014, the network reported 4 fireballs.
(3 sporadics, 1 December Leonis Minorid)

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 December 25, 2014 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2007 EJ
Jan 12
68.9 LD
1.1 km
1991 VE
Jan 17
40.6 LD
1.0 km
2004 BL86
Jan 26
3.1 LD
650 m
2008 CQ
Jan 31
4.8 LD
36 m
2000 EE14
Feb 27
72.5 LD
1.6 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
Heliophysics
  the underlying science of space weather
Space Weather Alerts
   
  more links...
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