You are viewing the page for Jun. 16, 2012
  Select another date:
<<back forward>>
SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 506.9 km/sec
density: 21.5 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: C1
2247 UT Jun16
24-hr: C2
0048 UT Jun16
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 16 Jun 12
Sunspot 1504 has developed a delta-class magnetic field that poses a threat for Earth-directed X-flares. Credit: SDO/HMI
Sunspot number: 113
What is the sunspot number?
Updated 15 Jun 2012

Spotless Days
Current Stretch: 0 days
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

Updated 15 Jun 2012


The Radio Sun
10.7 cm flux: 149 sfu
explanation | more data
Updated 15 Jun 2012

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 4 unsettled
24-hr max: Kp= 4
unsettled
explanation | more data
Interplanetary Mag. Field
Btotal: 40.3 nT
Bz: 31.7 nT north
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 13 Jun 12
There are no large coronal holes on the Earthside of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2012 Jun 16 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
60 %
60 %
CLASS X
10 %
10 %
Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at: 2012 Jun 16 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
35 %
25 %
MINOR
25 %
10 %
SEVERE
05 %
05 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
15 %
MINOR
25 %
25 %
SEVERE
55 %
40 %
 
Saturday, Jun. 16, 2012
What's up in space
 

Metallic photos of the sun by renowned photographer Greg Piepol bring together the best of art and science. Buy one or a whole set. They make a stellar gift.

 
Metallic pictures of the Sun

WEAK IMPACT: As expected, an interplanetary shock wave associated with the "double CME" of June 13-14 hit Earth's magnetic field today around 0900 UT. The impact was weak. The solar wind speed in the wake of the CME barely upticked to 400 km/s, and the impact did not trigger a geomagnetic storm.

CHANCE OF FLARES: Sunspot AR1504 has developed a 'beta-gamma-delta' magnetic field that harbors energy for strong solar flares--and the huge sunspot is directly facing Earth. Amateur astronomer Eric von der Heyden photographed the behemoth on June 16th from his backyard observatory in Mühltal-Traisa, Germany:

Each of the dark cores in the image is about twice the size of Earth. The sheer size of the complex makes it an easy target for backyard solar telescopes.

NOAA forecasters estimate a 65% chance of M-flares and a 5% chance of X-flares from AR1504 during the next 24 hours. X-flare alerts: text, voice.

Readers, please scan the Realtime Photo Gallery for constantly updated images of this sunspot plus a huge prominence which has popped up on the sun's western limb.

ELECTRIC-BLUE NOCTILUCENT CLOUDS: Data from NASA's AIM spacecraft show that noctilucent clouds (NLCs) are like a great "geophysical light bulb." They turn on every year in late spring, reaching almost full intensity over a period of no more than 5 to 10 days. News flash: The bulb is glowing. Flying photographer Brian Whittaker photographed these NLCs over Canada on June 13th:

"I was very happy to see my first noctilucent clouds of 2012," says Whittaker. "They were visible to the north for about 3 hours as we flew between Ottawa and Newfoundland at 35,000 feet."

These electric-blue clouds are hanging 85 km above Earth's surface, at the edge of space itself. Their origin is still largely a mystery; various theories associate them with space dust, rocket exhaust, global warming--or some mixture of the three. One thing is sure. They're baaack ... for the summer of 2012.

Observing tips: NLCs favor high latitudes, although they have been sighted as far south as Colorado and Virginia. Look west 30 to 60 minutes after sunset when the Sun has dipped 6o to 16o below the horizon. If you see luminous blue-white tendrils spreading across the sky, you may have spotted a noctilucent cloud.

Realtime Space Weather Photo Gallery
[Submit your photos] [NASA videos: 2012 Transit of Venus, ISS Transit of Venus]

  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 16, 2012 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2012 LA11
Jun 9
3.1 LD
--
27 m
2012 LJ
Jun 10
1.6 LD
--
33 m
2012 LT
Jun 11
5.2 LD
--
30 m
2002 AC
Jun 16
62.2 LD
--
1.2 km
1999 BJ8
Jun 16
68.8 LD
--
1.1 km
2005 GO21
Jun 21
17.1 LD
--
2.2 km
2012 LU
Jun 23
5.8 LD
--
41 m
2003 KU2
Jul 15
40.2 LD
--
1.3 km
2004 EW9
Jul 16
46.8 LD
--
2.1 km
2002 AM31
Jul 22
13.7 LD
--
1.0 km
37655 Illapa
Aug 12
37 LD
--
1.2 km
2000 ET70
Aug 21
58.5 LD
--
1.0 km
1998 TU3
Aug 25
49.2 LD
--
4.9 km
2009 AV
Aug 26
62.8 LD
--
1.1 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
Trade Show Displays
   
  more links...
©2010 Spaceweather.com. All rights reserved. This site is penned daily by Dr. Tony Phillips.
©2013 Spaceweather.com. All rights reserved.