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Solar wind
speed: 523.5 km/sec
density: 1.1 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: C3
2050 UT Jun24
24-hr: C9
1132 UT Jun24
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 24 Jun 13
Sunspots AR1775, AR1776 and AR1778 pose a threat for M-class solar flares. Credit: SDO/HMI
Sunspot number: 118
What is the sunspot number?
Updated 24 Jun 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

24 Jun 2013

The Radio Sun
10.7 cm flux: 128 sfu
explanation | more data
Updated 24 Jun 2013

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 4 unsettled
24-hr max: Kp= 4
explanation | more data
Interplanetary Mag. Field
Btotal: 4.1 nT
Bz: 1.8 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 23 Jun 13
Earth is inside a stream of solar wind flowing from the indicated coronal hole. Credit: SDO/AIA. 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: 06-24-2013 13:55:01
NOAA Forecasts
Updated at: 2013 Jun 24 2200 UTC
0-24 hr
24-48 hr
30 %
20 %
05 %
05 %
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 Jun 24 2200 UTC
0-24 hr
24-48 hr
15 %
10 %
01 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
25 %
20 %
20 %
15 %
Monday, Jun. 24, 2013
What's up in space

They came from outer space--and you can have one! Genuine meteorites are now on sale in the Space Weather Store.

Own your own meteorite

RADIATION STORM IS OVER: A solar radiation storm that peaked as a minor S1-category event on June 23rd is over. Proton counts near Earth have subsided to normal levels. SWx alerts: text, voice.

M-CLASS SOLAR FLARE: Sunspot AR1778 produced an impulsive M2-class solar flare on June 23rd at 20:56 UT. NASA's Solar Dynamics Observatory recorded the extreme ultraviolet flash:

The eruption flung material away from the blast site, but the debris does not appear to be heading toward Earth. Except for the effects of the UV flash, which created a short-lived wave of ionization in Earth's upper atmosphere, this flare was not geo-effective.

More flares could be in the offing. In addition to AR1778, sunspots AR1775 and AR1776 have 'beta-gamma' magnetic fields that harbor energy for significant eruptions. NOAA forecasters estimate a 40% chance of M-flares and a 5% chance of X-flares on June 24th. Solar Flare alerts: text, voice.

SPECTACULAR PHOTOS OF THE SUPERMOON: Over the weekend, sky watchers around the world witnessed an unusually bright and beautiful full moon--a "supermoon." Elias Chasiotis photographed the swollen orb rising over the ancient Greek temple of Poseidon at Sounion, Greece:

The supermoon was as much as 14% bigger and 30% brighter than other full Moons of 2013. "Perigee moon" is the scientific term for the phenomenon. Full Moons vary in size because of the oval shape of the Moon's orbit. The Moon follows an elliptical path around Earth with one side ("perigee") about 50,000 km closer than the other ("apogee"). Full Moons that occur on the perigee side of the Moon's orbit seem extra big and bright. On June 23rd, the Moon became full at 11:34 UT, only 23 minutes after perigee--a near-perfect coincidence.

More spectacular pictures of the super-perigee Moon may be found in the realtime photo gallery. Browse and enjoy.

Realtime Moon Photo Gallery

CHINESE SPACE STATION CROSSES THE SUN: Earlier this week in the sunny skies above the south of France, China's experimental Tiangong-1 space station flew directly in front of the sun. Using a filtered 6-inch telescope, astrophotographer Thierry Legault recorded the station's silhouette alongside big sunspot AR1775:

"I recorded two transits--one on June 16 and another on June 17th," says Legault. "They show the Tiangong-1 with 3 taikonauts inside."

Most readers are familiar with the 450-ton International Space Station. Fewer, perhaps, know about China's 8.5-ton Tiangong-1 (Heavenly Palace-1). It was launched in Sept. 2011 to establish a foothold in Earth orbit for China's fledgling space program. Tiangong-1 was briefly boarded by taikonauts (Chinese astronauts) in June 2012, and a second group is onboard now. Three Taikonauts arrived on June 13, 2013, on a 15-day mission to practice rendevous and docking maneuvers and to gain experience living in space. Their expedition is attracting little attention in Western press, but it is being widely followed in China. Earlier this week, more than 60 million students and teachers at 80,000 Chinese schools watched a live lecture by the crew of the Tiangong-1.

According to some reports, the Tiangong-1 will be de-orbited in late 2013 to make way for more advanced experimental stations, Tiangong-2 and Tiangong-3 in the years ahead. Ultimately, China hopes to place an Mir-class station in orbit by 2020.

See the Tiangong-1 before it goes! Spaceweather's Simple Flybys app turns your smartphone into a field-tested space station tracker. It works for both the ISS and the Tiangong-1.

Realtime Space Weather Photo Gallery

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

Realtime Aurora Photo Gallery

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 June 24, 2013 there were 1397 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2006 RO36
Jun 18
70.9 LD
1.2 km
2001 PJ9
Jul 17
29.2 LD
1.1 km
2006 BL8
Jul 26
9.3 LD
48 m
2003 DZ15
Jul 29
7.6 LD
153 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
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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