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Solar wind
speed: 311.7 km/sec
density: 1.8 protons/cm3
explanation | more data
Updated: Today at 2350 UT
X-ray Solar Flares
6-hr max: C1
2148 UT Jun03
24-hr: C1
2148 UT Jun03
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 03 Jun 15
All of these sunspots are quiet and stable. Solar activity remains very low. Credit: SDO/HMI

Sunspot number: 39
What is the sunspot number?
Updated 03 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 03 Jun 2015

The Radio Sun
10.7 cm flux: 101 sfu
explanation | more data
Updated 03 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= 2
explanation | more data
Interplanetary Mag. Field
Btotal: 4.0 nT
Bz: 1.4 nT north
explanation | more data
Updated: Today at 2351 UT
Coronal Holes: 03 Jun 15

There are no large coronal holes on the Earthside of the sun. 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: 06-03-2015 16:55:02
NOAA Forecasts
Updated at: 2015 Jun 03 2200 UTC
0-24 hr
24-48 hr
01 %
01 %
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 03 2200 UTC
0-24 hr
24-48 hr
10 %
10 %
01 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
20 %
20 %
20 %
20 %
10 %
10 %
Wednesday, Jun. 3, 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

SPACE WEATHER TEDx TALK: Living on the doorstep of an active star is fraught with peril and beauty. Ryan McGranaghan, a Ph.D. candidate studying space weather at the University of Colorado Boulder, talks about both in a TEDx talk entitled "Living with a Star (and how it will change everything you thought you knew about weather)." Watch it now.

SPACE STATION MARATHON: What's better than seeing the International Space Station glide brightly among the stars on a warm summer night? How about seeing it four times? For the next few weeks, sky watchers in the northern hemisphere can catch the ISS making multiple passes over their home towns. Photographer Alan Dyer sends this report from Gleichen, Alberta: "On the night of May 31/June 1, I was able to shoot the passage of the International Space Station on each of four successive orbits, at 90-minute intervals, from dusk to dawn."

"Seeing the space station on not one but two, three, or even four orbits in one night is possible at this time of year near northern summer solstice because the Station is now continuously lit by sunlight -- the Sun never sets from the altitude of the ISS," explains Dyer. "When the ISS should be entering night, sunlight streaming over the north pole still lights the station at its altitude of 400 km."

Satellite enthusiasts call this an "ISS marathon." Find out when to look using's Simple Satellite Tracker.

Realtime Space Weather Photo Gallery

NOCTILUCENT CLOUD SIGHTINGS: We often say that noctilucent clouds are "electric blue." One glance at this photo from Kristianstad, Sweden, explains why:

"On Monday night, pale ripples spread across 90 degrees of the northern sky," says photographer Jonas Carlsson. "This is a great beginning to the 2015 season."

Since June began, sky watchers have seen noctilucent clouds over Ireland, Sweden, Denmark, Scotland and Russia. And more are in the offing.... Data from NASA's AIM spacecraft have shown 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, and it is definitely electric blue.

Noctilucent clouds first appeared in the 19th century after the eruption of super-volcano Krakatoa. At the time, people thought NLCs were caused by the eruption, but long after Krakatoa's ash settled, the clouds remained. 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.

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

SUNSET SKY SHOW: If you love stargazing, there's a date you should mark on your calendar. It's June. That's right, the whole month. Throughout the month of June 2015, the two brightest planets in the night sky are converging for an amazing sunset sky show. At closest approach on June 30th, Venus and Jupiter will be less than 1/3rd of a degree apart. Even now, a month ahead of time, the gathering is beautiful. Leo Caldas sends this picture from Brasilia, Brazil:

"The Hubble Space Telescope flew by the planets just as I was photographing the conjunction," says Caldas. "Perfect timing."

In the weeks ahead, Venus and Jupiter will draw steadily closer together. You can see the distance shrink every night. Dates of special interest include June 12th, when Venus passes by the Beehive star cluster. Using binoculars, scan the sky around Venus to observe the cluster. On June 19th, the crescent Moon joins Venus and Jupiter to form a bright isosceles triangle in the sunset sky. One night later, on June 20th, the triangle reappears with shape-shifted vertices. From then until the end of the month, the converging planets will rush together, seemingly on a collision course, but actually en route to a near-miss on June 30th-July 1st.

Keep an eye on the sunset sky for the rest of the month. Backyard astronomy alerts: text, voice

Realtime Space Weather Photo Gallery

Realtime Sprite Photo Gallery

Realtime Aurora 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. 3, 2015, the network reported 13 fireballs.
(13 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 3, 2015 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2015 KP57
May 28
10.4 LD
44 m
2015 KW120
May 29
1.1 LD
27 m
2015 KH
May 29
14.3 LD
53 m
2015 KQ120
May 31
8.5 LD
20 m
2015 KM57
Jun 3
6.6 LD
36 m
2005 XL80
Jun 4
38.1 LD
1.0 km
2015 KA122
Jun 6
3.3 LD
101 m
2015 KU121
Jun 7
7.5 LD
109 m
2012 XB112
Jun 11
10.1 LD
2 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
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...
©2015 All rights reserved. This site is penned daily by Dr. Tony Phillips.
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