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Solar wind
speed: 367.1 km/sec
density: 5.8 protons/cm3
explanation | more data
Updated: Today at 0627 UT
X-ray Solar Flares
6-hr max: B5
0600 UT Jul01
24-hr: B5
0600 UT Jul01
explanation | more data
Updated: Today at: 0600 UT
Daily Sun: 01 Jul 15
Sunspot AR2376 has a 'beta-gamma' magnetic field that harbors energy for M-class solar flares. Credit: SDO/HMI

Sunspot number: 41
What is the sunspot number?
Updated 01 Jul 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 01 Jul 2015

The Radio Sun
10.7 cm flux: 101 sfu
explanation | more data
Updated 01 Jul 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: 6.3 nT
Bz: 1.9 nT north
explanation | more data
Updated: Today at 0627 UT
Coronal Holes: 01 Jul 15

Solar wind flowing from the indicated coronal hole should reach Earth on July 6-7. 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: 06-30-2015 17:55:03
NOAA Forecasts
Updated at: 2015 Jun 30 2200 UTC
0-24 hr
24-48 hr
10 %
10 %
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 30 2200 UTC
0-24 hr
24-48 hr
20 %
10 %
05 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
20 %
30 %
20 %
25 %
10 %
Wednesday, Jul. 1, 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

QUIET SUN: Solar activity has returned to low levels. Indeed, with no sunspots actively flaring, the sun's X-ray output is flatlining. NOAA forecasters estimate a 10% chance of M-class solar flares and a scant 1% chance of X-flares on July 1st. Solar flare alerts: text or voice.

BEAUTIFUL--BUT NO 'CHRISTMAS STAR': When the sun goes down tonight, step outside and look west. Venus and Jupiter are having a beautiful close encounter in the sunset sky. Here is photographer Marek Nikodem with a friend enjoying the view from Bydgoszcz, Poland:

"It was an amazing evening," says Nikodem, who caught the planets on June 30th at closest approach--about 0.3 degrees apart.

As July begins Venus and Jupiter are separating, but slowly, so they will remain a beautiful pair for some nights to come. Browse the photo gallery for more sightings:

Realtime Space Weather Photo Gallery

Extra: Some media reports have compared the June 30, 2015, conjunction to the 2 B.C. conjunction of the same planets often identified as the "Christmas Star" reported in the book of Matthew. In fact, there is no comparison. The conjunction of 2 B.C. was almost 200 times tighter than last night's meeting. In "The Star of Bethlehem: An Astronomical and Historical Perspective," Susan S. Carroll writes:

On June 17, 2 BC, Venus and Jupiter joined .... in the constellation Leo. The two planets were at best 6” arcseconds apart; some calculations indicate that they actually overlapped each other. This conjunction occurred during the evening and would have appeared as one very bright star. Even if they were 6” arcseconds apart, it would have required the sharpest of eyes to split the two, because of their brightness.

By the numbers: The June 30, 2015, conjunction was 0.3 degrees (1080 arcseconds) wide. The 2 B.C. conjunction was no more than 0.002 degrees (6 arcseconds) wide. Last night was beautiful, but it was no Christmas Star!

DRAGON DEBRIS: On Sunday morning, a SpaceX Falcon 9 rocket lifted off from Cape Canaveral bound for the International Space Station. Two minutes and 19 seconds later, it exploded. The Dragon spacecraft on top of the rocket was carrying more than 4,000 pounds of food and supplies--suddenly turned to ash. A weather radar in Melbourne FL tracked the airborne debris:

"Figuring that the debris cloud would likely show up on Doppler, I pulled the NEXRAD data for the Melbourne radar," says Rob Matson, who created the graphic. "High altitude (21.5-km) debris first appears a little after 14:28 UT (10:28 am EDT), which was a little less than 5 minutes after the failure. This image is a composite of 29 sweeps over a period of about 12 minutes."

"I figure debris will starting washing ashore near Daytona in the next day or two," he adds.

Matson has also supplied a kmz file for the radar data. Using that file, you can explore the debris plume in Google Earth. "You can get an idea of the early cloud
evolution by clicking on the right tab of the slider bar at upper left and sliding
your mouse left and right," he advises.

SPACE WEATHER MUTATES MICROBES: Regular readers know that and the students of Earth to Sky Calculus have been launching microbes to the edge of space, more than half a dozen times since April. Carried aloft by helium balloons, halobacteria are now frequent fliers to the stratosphere. An early finding of this ongoing experiment is that the microbes are mutated during their trip, probably by exposure to galactic cosmic rays. Would they be mutated even more by a solar storm? That's what the students wanted to find out, so on June 22nd they launched a new batch of microbes during the strongest solar storm of 2015. Here is the payload 108,213 feet above Earth's surface:

At the time of the flight, a severe G4-class geomagnetic storm was underway. After nightfall, people would see auroras as far south as California and Arizona. In addition, a maelstrom of solar protons were bombarding Earth's magnetic field, producing a moderately-strong S2-class radiation storm.

Will any of this affect the mutation rate of the microbes? Microbiologists Shil and Priya DasSarma are culturing the halobacteria now in their NASA-funded laboratory at the University of Maryland. When their results are available and confirmed, we will share them.

Astrobiologists have a special interest in halobacteria. This extremophile has the ability to shield itself from harmful radiation and to repair damaged DNA. Researchers have speculated that it might be able to survive on the planet Mars. The temperature, air pressure, and radiation environment in Earth's stratosphere is similar to Mars, so a balloon flight is a good way to test halobacteria's "Red Planet readiness."

HEY, THANKS! All of the high-altitude astrobiology research featured on is crowd-funded. This particular flight was sponsored by Stuart Bayne, a.k.a. The Fire P.I., an expert investigator of fires and explosions. Here is his logo at the apex of the flight:

His generous donation of $500 paid for the helium, the balloon, and other supplies required to get this mission off the ground. In return, he will receive a full-length HD video of the flight. Thanks, Stuart!

Readers, would you like to sponsor a research flight and see your favorite photo or business logo at the edge of space? If so, please contact Dr. Tony Phillips to make arrangements.

Realtime Aurora Photo Gallery

Realtime NLC 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. 30, 2015, the network reported 88 fireballs.
(86 sporadics, 1 Microscorpiid, 1)

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 July 1, 2015 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2015 MA54
Jun 25
6.8 LD
37 m
2005 VN5
Jul 7
12.6 LD
18 m
2015 HM10
Jul 7
1.1 LD
81 m
1994 AW1
Jul 15
25.3 LD
1.3 km
2011 UW158
Jul 19
6.4 LD
540 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
2004 BO41
Aug 31
57.3 LD
1.2 km
1991 CS
Sep 4
62.1 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
Columbia Northern High School
  Web-based high school science course with free enrollment
  more links...


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