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Solar wind
speed: 267.4 km/sec
density: 2.8 protons/cm3
explanation | more data
Updated: Today at 2346 UT
X-ray Solar Flares
6-hr max: C1
1707 UT Nov28
24-hr: C1
0041 UT Nov28
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 28 Nov 13
Sunspots AR1907 - AR1909 are rapidly growing, but they are not yet flaring. Solar activity remains low. Credit: SDO/HMI
Sunspot number: 76
What is the sunspot number?
Updated 28 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

Update
28 Nov 2013

The Radio Sun
10.7 cm flux: 129 sfu
explanation | more data
Updated 28 Nov 2013

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 1
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 6.0 nT
Bz: 0.8 nT north
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 28 Nov 13
There are no large coronal holes on the Earthside of the sun. Credit: SDO/AIA.

Spaceweather.com 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: 11-28-2013 10:55:02
SPACE WEATHER
NOAA Forecasts
Updated at: 2013 Nov 28 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: 2013 Nov 28 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
05 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
15 %
15 %
SEVERE
05 %
05 %
 
Thursday, Nov. 28, 2013
What's up in space
 

When is the best time to see auroras? Where is the best place to go? And how do you photograph them? These questions and more are answered in a new book, Northern Lights - a Guide, by Pal Brekke & Fredrik Broms.

 
Northern Lights - a Guide

COMET ISON--UPDATE: New images from SOHO show something emerging from behind the sun. It could be a small fragment of Comet ISON's nucleus or perhaps a "headless comet"--a stream of debris marking the remains of the comet's disintegrated core. Watch the movie and stay tuned for updates.

COMET ISON, R.I.P? Evidence is mounting that comet ISON did not survive its brush with the sun earlier today. At 01:45 EST on Nov. 28th, Thanksgiving Day in the USA, the comet was supposed to pass a little more than a million miles above the surface of the sun. As a new movie from SOHO shows, the comet had already disintegrated. Click to set the scene in motion, and pay careful attention to the head of the comet:

In the movie, Comet ISON is clearly falling apart as it approaches the sun. Researchers working with the Solar Dynamics Observatory report that they are saw nothing along the track that ISON was expected to follow through the sun's atmosphere. Update: Nevertheless, something has emerged from the sun's atmosphere. Watch this movie all the way to the end. Whether this is a small fragment of Comet ISON's nucleus or perhaps a "headless comet"--a stream of debris marking the remains of the comet's disintegrated core--remains to be seen.

An earlier movie from SOHO shows more of the comet's approach:

The movie spans a day and a half period from Nov. 27th (01:41 UT) to 28th (15:22 UT). We see that Comet ISON brightened dramatically on Nov. 27th before fading on Nov. 28th. That brightening might have been the disintegration event, in which the comet cracked open and spilled its vaporizing contents into space.

There is still a chance that some fraction of Comet ISON has survived. (That would make ISON a headless comet--more appropriate for Halloween than Thanksgiving.) Stay tuned for more movies as we watch for debris emerging behind the occulting disk of SOHO coronagraphs. Solar flare alerts: text, voice

Realtime Comet ISON Photo Gallery

WHICH SIDE OF THE SUN IS FACING COMET ISON? When Comet ISON sweeps through the sun's atmosphere on Nov. 28th, it will be in the 'hot zone' for CMEs. A strike by one of the massive storm clouds probably wouldn't destroy the comet, but it could have a dramatic effect on the comet's fragile tail. The odds of a strike depend on which side of the sun is facing the comet at the time of the flyby. This is something you can monitor using a NASA iPhone app called the Interplanetary 3D Sun:

The app displays an interactive 3D model of the entire sun photographed by extreme UV cameras onboard NASA's twin STEREO probes. The data are realtime and fully interactive (pinch, spin and zoom). As shown in this target list, you can view the sun from many locations around the solar system--including Comet ISON.

Active regions are color-coded by their potential for flares: Orange means "expect M-class solar flares," while red denotes sunspots capable of X-flares. In the screen shot above we see that, on Nov. 25th, Comet ISON was bearing down on an active region, AR1904, that posed a threat for M-class eruptions. What is targeting the comet today? Download the app and find out. Solar flare alerts: text, voice

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 Spaceweather.com.

On Nov. 28, 2013, the network reported 20 fireballs.
(18 sporadics, 1 Quadrantid, 1 November omega Oriond)

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 28, 2013 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2013 WY
Nov 25
7 LD
24 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
2000 EE14
Mar 6
64.6 LD
1.8 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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