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Solar wind
speed: 407.9 km/sec
density: 6.0 protons/cm3
explanation | more data
Updated: Today at 1157 UT
X-ray Solar Flares
6-hr max: B4
1134 UT Aug29
24-hr: C1
0226 UT Aug29
explanation | more data
Updated: Today at: 1200 UT
Daily Sun: 29 Aug 14
Sunspot AR2146 has a delta-class magnetic field that harbors energy for strong solar flares. Credit: SDO/HMI
Sunspot number: 78
What is the sunspot number?
Updated 29 Aug 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
29 Aug 2014

The Radio Sun
10.7 cm flux: 119 sfu
explanation | more data
Updated 29 Aug 2014

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 5 storm
24-hr max: Kp= 5
storm
explanation | more data
Interplanetary Mag. Field
Btotal: 6.7 nT
Bz: 1.5 nT south
explanation | more data
Updated: Today at 1157 UT
Coronal Holes: 29 Aug 14
There are no large coronal holes on the Earthside of the sun. 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: 08-27-2014 13:55:09
SPACE WEATHER
NOAA Forecasts
Updated at: 2014 Aug 28 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
20 %
20 %
CLASS X
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 Aug 28 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
35 %
15 %
MINOR
10 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
20 %
15 %
SEVERE
20 %
10 %
 
Friday, Aug. 29, 2014
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 LANDING SITE SLIDESHOW: In mid-November, ESA's Rosetta spacecraft will make history by dropping a probe onto the surface of a comet. Bristling with 10 sensors including a camera, the Philae lander will touchdown somewhere on the rugged double-lobed core of comet 67P/Churyumov-Gerasimenko. But where? A new slideshow previews 5 candidate landing sites.

AURORAS EXPLODE THROUGH ARTIC TWILIGHT: "After a long summer without stars, the Northern Lights have finally returned," reports Fredrik Broms of Tromsø, Norway (70 deg N latitude). "Last night's display was so strong that, although constellations such as Cassiopeia are still only to be made out very faintly on the blue night sky, the auroras shimmered and danced in an explosion of colors!" This is what he saw almost directly overhead around local midnight on August 28th:

The twilight display was sparked by a pair of CME impacts on August 27th. As Earth passed through the wake of the storm clouds, the interplanetary magnetic field (IMF) around Earth tipped south. This opened a crack in our planet's magnetosphere; solar wind poured in to fuel a light show that lasted for nearly three days and nights.

NOAA forecasters estimate a 20% chance of polar geomagnetic storms on Aug. 29th as CME effects wane. Arctic sky watchers should remain alert for green in the twilight. Aurora alerts: text, voice

Realtime Aurora Photo Gallery

TWILIGHT TRIANGLE: Go outside just after sunset and look southwest. Something there will make you do a double-take. Mars and Saturn have converged alongside the second brightest star in Libra to form a pretty twilight triangle:

"It was an amazing triangle," says photographer Marek Nikodem of Szubin, Poland. The planets are labeled in Nikodem's photo, but that star is not. That's because its name wouldn't fit. The second brightest star in Libra is Zubenelgenubi. Pronounced "zoo-BEN-el-je-NEW-bee," it is a double star 77 light years from Earth easily split by binoculars or a small backyard telescope.

Soon, the threesome will become a foursome. The crescent Moon will pass through the triangle on August 30th and 31st. On those evenings, in the time it takes to scan your telescope around a small patch of sky, you can see a double star, the rings of Saturn, the red disk of Mars, and the cratered landscape of the Moon. Mark your calendar!

Realtime Space Weather Photo Gallery


Realtime Meteor Photo Gallery


Realtime NLC 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 Aug. 28, 2014, the network reported 27 fireballs.
(25 sporadics, 2 Southern delta Aquariids)

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 August 29, 2014 there were 1495 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2014 QY33
Aug 30
6.5 LD
24 m
2014 QO295
Aug 31
4.7 LD
16 m
2014 QT295
Sep 5
6.8 LD
24 m
2013 RZ53
Sep 9
1.9 LD
3 m
2002 CE26
Sep 9
47.9 LD
1.8 km
2009 RR
Sep 16
2 LD
34 m
2006 GQ2
Sep 19
65.9 LD
1.1 km
2009 FG19
Sep 26
34.6 LD
1.1 km
2014 NE52
Sep 30
61.2 LD
1.1 km
2001 EA16
Oct 7
35.5 LD
1.9 km
2011 TB4
Oct 9
5.8 LD
34 m
2003 UC20
Oct 31
52.4 LD
1.0 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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