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Solar wind
speed: 317.2 km/sec
density: 5.7 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: B7
2202 UT Jul24
24-hr: C2
0151 UT Jul24
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 24 Jul 14
Sunspot AR2121 poses an increasing threat for C-class solar flares. Credit: SDO/HMI
Sunspot number: 55
What is the sunspot number?
Updated 24 Jul 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
24 Jul 2014

The Radio Sun
10.7 cm flux: 99 sfu
explanation | more data
Updated 24 Jul 2014

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: 5.3 nT
Bz: 4.7 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 24 Jul 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: 07-23-2014 13:55:07
SPACE WEATHER
NOAA Forecasts
Updated at: 2014 Jul 24 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
01 %
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: 2014 Jul 24 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
20 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
20 %
20 %
SEVERE
15 %
15 %
 
Thursday, Jul. 24, 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

THE SOLAR SUPERSTORM OF JULY 2012: This week marks the second anniversary of a scary near-miss. On July 23, 2012, Earth narrowly evaded a powerful solar storm capable of knocking civilization back into the 19th century. The event confirms that "solar superstorms" are real, and the odds of impact may be higher than previously supposed: full story.

NOCTILUCENT CLOUDS: Noctilucent clouds (NLCs), which ring the Arctic Circle during the months of northern summer, often begin to fade in late July/early August. This year, they are still going strong. "Last night we witnessed another vivid display of NLCs," reports Timo Newton-Syms, who sends this picture from Helsinki, Finland:

Seeded by meteor smoke, NLCs are Earth's highest clouds. They glow electric-blue when sunlight strikes them more than 80 km above Earth's surface. Meanwhile, closer to the ground, ordinary tropospheric clouds are relatively dark as they are shadowed by the body of the planet below.

"The contrast between the two types of clouds is evident in my photo," says Newton-Syms.

The natural habitat of noctilucent clouds is the Arctic Circle. In recent years, however, they have spread to lower latitudes with sightings as far south as Utah and Colorado. This may yet happen in 2014 even as the season comes to an end. Observing tips: Look west 30 to 60 minutes after sunset when the Sun has dipped 6o to 16o below the horizon. If you see blue-white tendrils zig-zagging across the sky, you may have spotted a noctilucent cloud.

Realtime NLC Photo Gallery

RADIO BURSTS FROM JUPITER: This week, Jupiter is passing behind the sun. Normally solar interference would make it difficult for radio astronomers to pick up Jupiter's shortwave radio bursts. Because the sun is so quiet, however, Jupiter is still able to maake itself heard. "I was able to capture distinct narrow-band radio emissions from Jupiter on July 21st," reports Thomas Ashcraft of New Mexico. They are the sloping lines in this dynamic spectrum he recorded using a RadioJove Project dual dipole antenna:

"At the time Jupiter was 6.3 Astronomical Units (585,621,586 miles) distant from Earth," he adds. "I think this is a neat observation because it means there is always the possibility of receiving Jupiter radio emissions here on Earth--even when the sun is in the way and Jupiter is very distant."

Jupiter's radio storms are caused by natural radio lasers in the planet's magnetosphere that sweep past Earth as Jupiter rotates. Electrical currents flowing between Jupiter's upper atmosphere and the volcanic moon Io can boost these emissions to power levels easily detected by ham radio antennas on Earth. Jovian "S-bursts" and "L-bursts" mimic the sounds of woodpeckers, whales, and waves crashing on the beach. Here are a few audio samples: S-bursts, S-bursts (slowed down 128:1), L-Bursts. The type of emissions Ashcraft picked up on July 21st were S-bursts.

Realtime Space Weather Photo Gallery


Realtime Aurora 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 Spaceweather.com.

On Jul. 24, 2014, the network reported 18 fireballs.
( 18 sporadics)

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 July 24, 2014 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2002 JN97
Aug 2
61.4 LD
2.0 km
2001 RZ11
Aug 17
34.2 LD
2.2 km
2013 WT67
Aug 17
16.1 LD
1.1 km
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
1.0 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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