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Solar wind
speed: 322.7 km/sec
density: 11.4 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: C1
1710 UT Jun19
24-hr: C8
0954 UT Jun19
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 19 Jun 13
Sunspot AR1775 poses a slim threat for M-class solar flares. Credit: SDO/HMI
Sunspot number: 120
What is the sunspot number?
Updated 19 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

19 Jun 2013

The Radio Sun
10.7 cm flux: 125 sfu
explanation | more data
Updated 19 Jun 2013

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
explanation | more data
Interplanetary Mag. Field
Btotal: 6.3 nT
Bz: 4.3 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 18 Jun 13
Solar wind flowing from this coronal hole could brush against Earth's magnetic field on June 23-24. Credit: SDO/AIA.

NEW: 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: 06-19-2013 11:55:02
NOAA Forecasts
Updated at: 2013 Jun 19 2200 UTC
0-24 hr
24-48 hr
30 %
30 %
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 19 2200 UTC
0-24 hr
24-48 hr
25 %
35 %
05 %
20 %
01 %
05 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
35 %
30 %
30 %
55 %
Wednesday, Jun. 19, 2013
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

EARTH THROUGH THE RINGS OF SATURN: One month from now, on July 19th, NASA's Cassini spacecraft will photograph Earth from Saturn. The unprecedented image will show the "Pale Blue Dot" in natural color, as it would appear to the human eye, framed by the rings of another world. Get the full story from Science@NASA.

CORONAL HOLE: A large "coronal hole" has formed in the atmosphere above the sun's northern hemisphere, and it is spewing solar wind into space. NASA's Solar Dynamics Observatory took this picture of the UV-dark gap during the early hours of June 19th:

Coronal holes are places where the sun's magnetic field opens up and allows the solar wind to escape. A wide stream of plasma flowing from this particular coronal hole will reach Earth, and brush against our planet's magnetic field, on June 23-24. High-latitude sky watchers should be alert for auroras on those dates. Aurora alerts: text, voice.

Realtime Space Weather Photo Gallery

SPACE WEATHER BALLOON LAUNCH: On June14th high school students in Bishop, California, launched their seventh "space weather balloon." Its mission: To investigate the effect of solar flares and radiation storms on Earth's ozone layer. The group's mentor, Dr. Tony Phillips, photographed the balloon moments before liftoff from their "Edge of Space Port" in the Sierra Nevada mountains:

The balloon's payload carried two cameras, an ozone sensor, a cryogenic thermometer, and a GPS altimeter to an altitude of 110,000 feet above Earth's surface. All of the payload's core space weather instrumentation was built by the students themselves. After the balloon popped, as planned, the payload parachuted back to Earth, landing near the ancient Bristlecone Pine Forest in California's White Mountains. A recovery team has already retrieved the payload, and students are inspecting the data now.

The students launched the balloon on June 14th, a period of low solar activity, because they wanted to compare quiet sun data with a similar data set they collected on May 22nd during a strong solar radiation storm. Stay tuned for their results!

Sponsor a space weather balloon: Would you like to sponsor a flight? The students, who call themselves Earth to Sky Calculus, offer a service for sponsors called "Edge of Space Advertising." During the "ozone flight" on June 14th they flew an ad for Interpret America (flight photo), which paid for the helium in the balloon. The students have also flown banners, cards, cows, running shoes, presidents and other items. If there's something you'd like to fly, please contact Dr. Tony Phillips for rates and details.

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 19, 2013 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
1999 WC2
Jun 12
39.2 LD
1.9 km
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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