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Solar wind
speed: 494.6 km/sec
density: 2.2 protons/cm3
explanation | more data
Updated: Today at 2350 UT
X-ray Solar Flares
6-hr max: C4
1726 UT Jun11
24-hr: M1
0855 UT Jun11
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 11 Jun 15
Decaying sunspot AR2360 has a 'beta-gamma' magnetic field that harbors energy for M-class solar flares. Credit: SDO/HMI

Sunspot number: 105
What is the sunspot number?
Updated 11 Jun 2015

Spotless Days
Current Stretch: 0 days
2015 total: 0 days (0%)

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%)

Updated 11 Jun 2015

The Radio Sun
10.7 cm flux: 135 sfu
explanation | more data
Updated 11 Jun 2015

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 3
explanation | more data
Interplanetary Mag. Field
Btotal: 2.9 nT
Bz: 0.3 nT south
explanation | more data
Updated: Today at 2350 UT
Coronal Holes: 11 Jun 15

Solar wind flowing from this coronal hole should reach Earth on June 14-15. Credit: SDO/AIA.
Noctilucent Clouds The northern season for NLCs is underway. NASA's AIM spacecraft spotted the first noctilucent clouds over the Arctic Circle on May 19th.
Switch view: Europe, USA, Asia, Polar
Updated at: 06-09-2015 16:55:02
NOAA Forecasts
Updated at: 2015 Jun 11 2200 UTC
0-24 hr
24-48 hr
25 %
25 %
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: 2015 Jun 11 2200 UTC
0-24 hr
24-48 hr
35 %
35 %
25 %
10 %
05 %
01 %
High latitudes
0-24 hr
24-48 hr
10 %
15 %
30 %
30 %
55 %
45 %
Thursday, Jun. 11, 2015
What's up in space

Come to Tromsø and share Marianne's passion for rural photography: invites you to experience "Heaven on Earth" with an aurora, fjord, fishing, whale watching, photography or sightseeing tour.

Chase the Light Tours

CHANCE OF STORMS: NOAA forecasters estimate a 55% chance of polar geomagnetic storms on June 12th when a CME is expected to hit Earth's magnetic field. The solar storm cloud was hurled in our direction on June 9th by an eruption near sunspot AR2364. High-latitude sky watchers should be alert for auroras. Aurora alerts: text, voice

NOCTILUCENT CLOUDS REACH THE USA: For weeks, sky watchers have been reporting noctilucent clouds (NLCs) in the evening skies of Canada and northern Europe. Here they are on June 7th over Penmon Point in Anglesey, Wales:

"The stunning display of noctilucent clouds lasted 4 hours," says photographer Kevin Lewis. "A meteor breaking up in one shot was an added bonus."

The 2015 season for NLCs started on May 19th when NASA's AIM spacecraft spotted a patch of electric blue over the Arctic Circle. Since then, the clouds have been creeping south and, on June 8-9, they crossed the border into the lower 48 US states. "I caught sight of them around 3:45 a.m. local time," reports Dustin Guy, who sends this picture from Seattle, Washington:

"I had to do a double take," says Guy. "It's been awhile since I last saw them!" Electric-blue ripples were also sighted in Polebridge, Montana.

Noctilucent clouds first appeared in the 19th century. At the time, they were a polar phenomenon usually restricted to regions around the Arctic and Antarctic Circles. In recent years, NLCs have intensified and spread with sightings as far south as Utah and Colorado. This could be a sign of increasing greenhouse gases in Earth's atmosphere.

At the moment, NLCs over the USA are little more than wan ripples. As summer unfolds, however, they could turn into something truly bright and eye-catching. Observing tips: 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 NLC Photo Gallery

MICROBES IN THE STRATOSPHERE: On June 8th, and the students of Earth to Sky Calculus flew another batch of halobacteria to the stratosphere onboard a suborbital helium balloon. Two species made the trip: Halorubrum lacusprofundi from Antarctica and NRC-1 from North America. Here is the view from the payload 106,661 feet above Earth's surface:

Tiny white vials on top of the payload (inset) contain the halobacteria--more than 1011 individual microbes. En route to the stratosphere they were exposed to temperatures as low as -63 C and cosmic radiation dose rates more than 100x greater than on the ground below. Amazingly, billions of the microbes survived this harsh treatment as the flight went on more almost three hours. The Antarctic microbes appear to be especially resiliant.

Astrobiologists have often asked themselves, could halobacteria survive on the planet Mars? Ultimately, balloon flights could help answer that question. Microbiologists Shil and Priya DasSarma are analyzing our flown samples at their NASA-supported laboratory at the University of Maryland. They may be able to unravel the high-altitude survival strategies of this amazing terrestrial extremophile.

HEY THANKS! The students wish to thank reader Stuart Bayne for sponsoring this flight. Stuart's $500 contribution paid for the helium and other supplies necessary to get the balloon off the ground. To say "thanks," we flew a picture of Stuart's older brother to the edge of space:

"My brother's birthday is next month," he explains. "I plan to use this picture to make an out-of-this-world birthday card."

Readers, if you would like to sponsor a launch, we can send your family to the edge of space, too. Contact Dr. Tony Phillips to book a flight.

Realtime Space Weather Photo Gallery

Realtime Aurora Photo Gallery

Realtime Sprite 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

On Jun. 11, 2015, the network reported 19 fireballs.
(19 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 June 11, 2015 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2015 KA122
Jun 6
3.3 LD
95 m
2015 KU121
Jun 7
7.5 LD
115 m
2015 LF
Jun 8
0.5 LD
22 m
2015 LH2
Jun 9
5.2 LD
26 m
2015 LH
Jun 10
3.7 LD
15 m
2012 XB112
Jun 11
10.1 LD
2 m
2015 LK
Jun 17
7.8 LD
39 m
2015 LG
Jun 18
8.8 LD
53 m
2015 KK57
Jun 23
8.3 LD
13 m
2005 VN5
Jul 7
12.6 LD
18 m
2015 HM10
Jul 7
1.1 LD
73 m
1994 AW1
Jul 15
25.3 LD
1.4 km
2011 UW158
Jul 19
6.4 LD
565 m
2013 BQ18
Jul 20
7.9 LD
38 m
1999 JD6
Jul 25
18.8 LD
1.6 km
2005 NZ6
Aug 6
76.5 LD
1.4 km
2005 JF21
Aug 16
20.1 LD
1.6 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
Columbia Northern High School
  Web-based high school science course with free enrollment
  more links...
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