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Solar wind
speed: 319.5 km/sec
density: 1.1 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: B3
2031 UT Aug03
24-hr: B3
0352 UT Aug03
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 03 Aug 13
The sun is peppered with spots, but none of them is actively flaring. Solar activity remains low. Credit: SDO/HMI
Sunspot number: 112
What is the sunspot number?
Updated 03 Aug 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
03 Aug 2013

The Radio Sun
10.7 cm flux: 113sfu
explanation | more data
Updated 03 Aug 2013

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 2.4 nT
Bz: 0.6 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 02 Aug 13
Solar wind flowing from this coronal hole could brush against Earth's magnetic field on August 3-4. 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: 08-03-2013 14:55:03
SPACE WEATHER
NOAA Forecasts
Updated at: 2013 Aug 03 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
05 %
05 %
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: 2013 Aug 03 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
30 %
MINOR
01 %
10 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
20 %
30 %
SEVERE
10 %
40 %
 
Saturday, Aug. 3, 2013
What's up in space
 

Listen to radar echoes from satellites and meteors, live on listener-supported Space Weather Radio.

 
Spaceweather Radio is on the air

HUBBLE SEES THE FIREBALL FROM A 'KILONOVA': NASA's Hubble Space Telescope has detected a new kind of stellar blast called a kilonova, which happens when neutron stars crash together. The observation solves a longstanding mystery of gamma-ray bursts. Get the full story form Science@NASA.

SPACE WEATHER FACT CHECK: Many readers are asking about a report in the Washington Examiner, which states that a Carrington-class solar storm narrowly missed Earth two weeks ago. There was no Carrington-class solar storm two weeks ago. On the contrary, solar activity was low throughout the month of July. The report is erroneous. The possibility of such a storm is, however, worth thinking about: A modern Carrington event would cause significant damage to our high-tech society. Solar flare alerts: text, voice.

PERSEID FIREBALLS: New research by NASA's Meteoroid Environment Office shows that among all annual meteor showers the Perseids are the #1 source of fireballs. The first Perseid fireballs of 2013 are arriving now. Earth is entering a stream of debris from parent comet 109P/Swift-Tuttle, and meteoroids are hitting the top of the atmosphere at 135,000 mph. Petr Horálek photographed this Perseid streaking along the backbone of the Milky Way over Úpice, Czech republic, on August 3rd:

"This was my first Perseid of the season," he says. "During the 35 minutes I watched, I saw 4 more. Can't wait for the maximum..."

The maximum is coming. Meteor rates should remain low for the next week as Earth penetrates the sparse outskirts of the debris stream, then skyrocket to ~100 meteors per hour as the calendar turns to the second week of August. Forecasters expect maximum Perseid activity on the nights of August 12-13. [meteor radar] [NASA: Perseid fireballs].

Realtime Meteor Photo Gallery

MORNING PLANETS: If you wake up before sunrise this weekend, look east. Three planets are preceding the sun into the dawn sky: Jupiter, Mars, and Mercury. Heiko Ulbricht sends this Saturday morning snapshot from Freital, Saxony, Germany:

"The planets and the crescent Moon were a wonderful sight this morning," says Ulbricht. "It's going to be a fantastic sky show in the mornings ahead as the Moon glides past the planets one after another."

On Sunday morning, August 4, the narrowing crescent will appear to the right of Mars. On Monday morning, August 5, the Moon will pass Mercury in deep-red twilight. Binoculars might be required for the Mercury passage. Warning: Do not point the optics at the rising sun. Set your alarm for dawn and enjoy the show!

Realtime Space Weather Photo Gallery


Realtime Aurora Photo Gallery


Realtime Noctilucent Cloud Photo Gallery
[previous years: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011]


Realtime Comet Photo Gallery

  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 3, 2013 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2003 DZ15
Jul 30
9.1 LD
152 m
2005 WK4
Aug 9
8.1 LD
420 m
1999 CF9
Aug 23
24.7 LD
1.1 km
2002 JR9
Aug 31
63.5 LD
1.4 km
1992 SL
Sep 23
70 LD
1.1 km
2000 DK79
Nov 10
49.1 LD
3.2 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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