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Solar wind
speed: 528.5 km/sec
density: 4.2 protons/cm3
explanation | more data
Updated: Today at 0157 UT
X-ray Solar Flares
6-hr max: M1
2004 UT Oct20
24-hr: M4
1638 UT Oct20
explanation | more data
Updated: Today at: 2359 UT
Daily Sun: 21 Oct 14
Huge sunspot AR2192 poses a continued threat for X-class solar flares. Credit: SDO/HMI
Sunspot number: 86
What is the sunspot number?
Updated 20 Oct 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 20 Oct
2014

The Radio Sun
10.7 cm flux: 160 sfu
explanation | more data
Updated 20 Oct 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= 5
storm
explanation | more data
Interplanetary Mag. Field
Btotal: 8.3 nT
Bz: 2.8 nT north
explanation | more data
Updated: Today at 0156 UT
Coronal Holes: 20 Oct 14
Solar wind flowing from the indicated coronal hole should reach Earth on or about Oct 22-23. Credit: SDO/AIA.

Spaceweather.com 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: 09-02-2014 12:55:12
SPACE WEATHER
NOAA Forecasts
Updated at: 2014 Oct 20 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
60 %
60 %
CLASS X
20 %
20 %
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 Oct 20 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
30 %
25 %
MINOR
15 %
10 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
15 %
MINOR
25 %
30 %
SEVERE
45 %
40 %
 
Tuesday, Oct. 21, 2014
What's up in space
 

On October 23rd there will be a partial eclipse of the Sun. Got clouds? No problem. The event will be broadcast live on the web by the Coca-Cola Science Center.

 
Solar Eclipse Live

METEORS FROM HALLEY'S COMET: Earth is passing through a stream of debris from Halley's Comet, source of the annual Orionid meteor shower. Forecasters expect the shower to peak on Tuesday, Oct. 21st, with as many as 25 meteors per hour. The best time to look is during the dark hours before local sunrise. [full story] [sky map] [meteor radar]

SOLAR WIND SPARKS NORTHERN LIGHTS: A high-speed stream of solar wind is buffeting Earth's magnetic field, sparking bright lights around both poles. "This evening the auroras appeared everywhere," reports Anne Birgitte Fyhn, who photographed the display from a pond on Kvaløya island, Tromsø, Norway:

"They were amazing," she says. "I ran around the pond a couple of times taking pictures from different spots. Finally, I decided to just sit down, look up, and enjoy the show."

High-latitude sky watchers should remain alert for auroras on Oct. 21-22. NOAA forecasters estmate a 45% chance of geomagnetic storms as the solar wind continues to blow. Aurora alerts: text, voice

Realtime Aurora Photo Gallery

GROWING CHANCE OF FLARES: Big sunspot AR2192 has grown even bigger, spreading across 1/3rd more solar terrain today than it did yesterday. NASA's Solar Dynamics Observatory recorded the expansion:

The chances of an explosion are growing along with the sunspot. On Oct. 20th, NOAA forecasters boosted the odds of an M-class flare to 60% and an X-flare to 20%. Solar flare alerts: text, voice

Yesterday, the sunspot produced a long-duration X1-flare (movie) and a strong HF radio blackout over Asia and Australia. The next X-flare, if one occurs, will be even more geoeffective as the sunspot turns toward Earth.

If you have a solar telescope, now is a great time to look at the sun. AR2192 looks absolutely spectacular. Snapshots from around the world may be found in the realtime photo gallery.

Realtime Space Weather Photo Gallery


Realtime Comet Photo Gallery


Realtime Eclipse 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 Oct. 20, 2014, the network reported 28 fireballs.
(20 sporadics, 8 Orionids)

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 October 21, 2014 there were 1508 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2014 TV
Oct 18
4.5 LD
60 m
2014 UR
Oct 18
2.9 LD
21 m
2014 TT35
Oct 22
6.9 LD
27 m
2014 TP57
Oct 22
8.2 LD
23 m
2014 SC324
Oct 24
1.5 LD
65 m
2003 UC20
Oct 31
52.4 LD
1.0 km
2004 JN13
Nov 18
52.4 LD
4.1 km
1998 SS49
Nov 18
73.9 LD
3.1 km
2005 UH3
Nov 22
44.4 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.
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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