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Solar wind
speed: 423.4 km/sec
density: 22.1 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: M6
2240 UT Nov03
24-hr: M6
2240 UT Nov03
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 03 Nov 14
None of these sunspots poses a threat for strong flares. Credit: SDO/HMI
Sunspot number: 91
What is the sunspot number?
Updated 03 Nov 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 03 Nov

The Radio Sun
10.7 cm flux: 124 sfu
explanation | more data
Updated 03 Nov 2014

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 3
explanation | more data
Interplanetary Mag. Field
Btotal: 7.3 nT
Bz: 4.7 nT north
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 03 Nov 14
Solar wind flowing from the indicated coronal hole should reach Earth on Nov. 4. 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: 09-02-2014 12:55:12
NOAA Forecasts
Updated at: 2014 Nov 03 2200 UTC
0-24 hr
24-48 hr
25 %
25 %
01 %
01 %
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 Nov 03 2200 UTC
0-24 hr
24-48 hr
25 %
30 %
05 %
10 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
30 %
30 %
30 %
40 %
Monday, Nov. 3, 2014
What's up in space

Would you like a call when things are happening in the night sky? Sign up for backyard astronomy alerts from voice or text.


HUMAN MISSIONS TO VENUS? Venus is hellishly hot and has a crushing atmosphere 90 times denser than Earth's. So why would anyone want to go there? A new blog post from Astrobiology Magazine suggests it might be possible, and maybe even desirable, for humans to visit the second planet from the sun. Hint: It's done using balloons. Read it!

SOMETHING IS COMING: None of the sunspots on the Earthside of the sun are actively flaring. A sunspot just around the bend, however, could break the quiet. Earth-orbiting satellites are detecting flare activity behind the sun's northeastern limb. NASA's Solar Dynamics Observaory recorded this flash of extreme UV radiation on Nov. 3rd at 11:56 UT:

Although the eruption was partially eclipsed by the edge of the sun, it registered M2.2 on the Richter Scale of Solar Flares. This means the actual flare was much stronger, possibly even an X-flare. The same hidden active region produced a C9-class flare and CME on Nov. 2nd: movie. Again, because the flare was eclipsed, the actual eruption was probably much stronger than its nominal classification.

In summary, something is coming. Soon, the sun's rotation will carry this active region into view and it will be possible to assess its potential for more flares. Stay tuned for updates. Solar flare alerts: text, voice

Realtime Aurora Photo Gallery

SOLAR ACTIVITY ... BY THE NUMBERS: During the last two weeks of October, the biggest sunspot in nearly 25 years, AR2192, rotated across the solar disk crackling with strong flares. reader Sean Barnes
has prepared a summary of the eruptions. There were 26 M-flares, 6 X-flares and, perhaps most astronishly of all, zero Earth-directed CMEs. Click on the image below to browse the numbers in detail:

The monster sunspot was remarkable for both the large number of flares it produced and the small number of CMEs. When the magnetic canopy of a sunspot explodes, it typically produces a flash of electromagnetic radiation (a solar flare) and hurls a billion-ton cloud of gas (a CME) into space. The two phenomena don't always go together, but they often do. AR2192, however, was "all flash." It produced lots of solar flares but very few CMEs--only one, in fact. No one knows why.

Because AR2192 hurled zero CMEs toward Earth, our planet did not experience any geomagnetic storms during the sunspot's apparition. For aurora watchers, the Great Sunspot was actually a bit of a dud.

Right now AR2192 is transiting the farside of the sun. If it does not decay too much while it is there, the sunspot could return intact to the Earthside before mid-November. Then the numbers will start increasing again. Stay tuned. Solar flare alerts: text, voice

Realtime Space Weather Photo Gallery

Realtime Eclipse 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 Nov. 3, 2014, the network reported 21 fireballs.
(18 sporadics, 2 Orionids, 1 Northern Taurid)

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 3, 2014 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2003 UC20
Oct 31
52.4 LD
1.0 km
2014 UA176
Nov 6
4.8 LD
18 m
2014 UX57
Nov 6
3.6 LD
23 m
2014 UD192
Nov 9
3.1 LD
29 m
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.
  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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