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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 313.4 km/sec
density: 11.1 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 2349 UT
X-ray Solar Flares
6-hr max: B4
1701 UT Jun07
24-hr: C1
0334 UT Jun07
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 07 Jun 17
AR2661 is decaying and poses a declining threat for solar flares. Credit: SDO/HMI

Sunspot number: 18
What is the sunspot number?
Updated 07 Jun 2017

Spotless Days
Current Stretch: 0 days
2017 total: 38 days (24%)
2016 total: 32 days (9%)
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 07 Jun 2017


The Radio Sun
10.7 cm flux: 75 sfu
explanation | more data
Updated 07 Jun 2017

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 2.8 nT
Bz: -0.8 nT south
more data: ACE, DSCOVR
Updated: Today at 2348 UT
Coronal Holes: 06 Jun 17

There are no large coronal holes on the Earthside of the sun. Credit: NASA/SDO.
Noctilucent Clouds NASA's AIM spacecraft, which monitors NLCs from space, recent moved into a new orbit around Earth. Daily data are currently unavailable while the spacecraft's pointing settles. Polar images should resume in early June. Stay tuned!
Switch view: Ross Ice Shelf, Antarctic Peninsula, East Antarctica, Polar
Updated at: 02-24-2017 17:55:02
SPACE WEATHER
NOAA Forecasts
Updated at: 2017 Jun 07 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
01 %
01 %
CLASS X
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: 2017 Jun 07 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
15 %
15 %
SEVERE
10 %
10 %
 
Wednesday, Jun. 7, 2017
What's up in space
       
 

Lights Over lapland is excited to announce that Autumn Aurora Adventures are available for immediate booking! Reserve your adventure of a lifetime in Abisko National Park, Sweden today!

 

STRAWBERRY MOON: There's a full Moon this Friday, June 9th. According to folklore it has a special name: the "Strawberry Moon." It gets its name from June-bearing strawberry plants, which have a short (three week) harvest season that begins about now. Sink your teeth into a Fragaria ananassa, and enjoy the strawberry moonlight.

SLOW SOLAR FLARE: Solar flares occur when magnetic fields get tangled. Lines of magnetic force above sunspots criss, cross, and explode in a flash of electromagnetic radiation. This process, called "magnetic reconnection", usually happens in a matter of minutes. Earlier today, NASA's Solar Dynamics Observatory witnessed an explosion that took two hours to unfold:

This leisurely C1-class solar flare happened in the magnetic canopy of sunspot AR2661. Often, slow explosions like this one use their time to gather momentum and hurl a CME into space. Not this time, though. No one knows why a fraction of slow flares fail to produce CMES. It's a minor mystery that underscores the continued unpredictability of space weather.

Realtime Space Weather Photo Gallery

DOUBLE SOLAR ECLIPSE ON JUPITER: Millions of people are looking forward to a total eclipse of the sun on Aug. 21, 2017. That's nothing. Jupiter just had TWO solar eclipses at the same time. On June 3rd, Ed Lomeli of Sacramento, California, video-recorded the shadows of Io and Ganymede lancing across the giant planet's cloudtops:

Within those dark circular shadows, Jovian day turned to night as the moons overhead blocked the sun. Two total eclipses were underway at the same time.

Envious Earthlings can take solace: Eclipses on Jupiter aren't nearly as beautiful as they are on our planet. Here on Earth, the Moon and sun are almost precisely the same size--an incredible coincidence that produces phenomena such as Baily's Beads and the Diamond ring. When the disk of the sun is so precisely covered, we can see the ghostly tendrils of the sun's outer atmosphere (the corona) shimmering across the sky.

On Jupiter, however, local moons appear to be much larger than the distant sun. Io, for example, is 6 times wider than the solar disk; it completely swallows the sun's corona. This mismatch in size mitigates the beauty of the occasion. The best eclipses are homegrown, after all.

THE SPACE HAMMER FOR FATHER'S DAY: Just in time for Father's Day: The Space Hammer. On June 2nd, the students of Earth to Sky Calculus flew a payload of hammers to the edge of space, 35.0 km (115,000 feet) above Earth's surface on board a high altitude helium balloon. You can have one for $99.95:

These compact 8 oz. hammers are light enough to fly on a balloon yet dense enough to deliver a powerful blow. The magnetic head holds a nail for one-handed starting, and the stubby 6 in. length is perfect for tight work areas.

Each space hammer comes with a unique gift card showing the tool floating at the top of Earth's atmosphere. The interior of the card tells the story of the flight and confirms that this gift has been to the edge of space and back again.

More edge of space Father's Day gifts may be found in the Earth to Sky Store.

 Far Out Gifts: Earth to Sky Store
All proceeds support hands-on STEM education


Realtime Aurora Photo Gallery


Realtime Comet 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 Spaceweather.com.

On Jun. 7, 2017, the network reported 1 fireballs.
(1 sporadic)

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 7, 2017 there were 1803 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Velocity (km/s)
Diameter (m)
2017 KJ3
2017-Jun-03
11.1 LD
11.3
48
2017 KJ5
2017-Jun-04
11.6 LD
3.7
17
2017 LG
2017-Jun-04
12.2 LD
6.3
39
2017 KK27
2017-Jun-04
15.7 LD
6.5
29
2017 LD
2017-Jun-05
3 LD
4.8
10
2017 KR27
2017-Jun-06
7 LD
12.6
72
2017 KQ27
2017-Jun-06
1 LD
10.7
24
2017 LE
2017-Jun-07
5.2 LD
9
19
2017 HV4
2017-Jun-10
19.5 LD
3.9
50
2017 KF3
2017-Jun-11
12.9 LD
11.2
40
2010 VB1
2017-Jun-16
10.3 LD
8.3
81
471984
2017-Jun-18
19.1 LD
7.7
102
441987
2017-Jun-24
7.9 LD
12.7
178
2017 BS5
2017-Jul-23
3.2 LD
5.8
54
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.
  Cosmic Rays in the Atmosphere

Readers, thank you for your patience while we continue to develop this new section of Spaceweather.com. We've been working to streamline our data reduction, allowing us to post results from balloon flights much more rapidly, and we have developed a new data product, shown here:

This plot displays radiation measurements not only in the stratosphere, but also at aviation altitudes. Dose rates are expessed as multiples of sea level. For instance, we see that boarding a plane that flies at 25,000 feet exposes passengers to dose rates ~10x higher than sea level. At 40,000 feet, the multiplier is closer to 50x. These measurements are made by our usual cosmic ray payload as it passes through aviation altitudes en route to the stratosphere over California.

What is this all about? Approximately once a week, Spaceweather.com and the students of Earth to Sky Calculus fly space weather balloons to the stratosphere over California. These balloons are equipped with radiation sensors that detect cosmic rays, a surprisingly "down to Earth" form of space weather. Cosmic rays can seed clouds, trigger lightning, and penetrate commercial airplanes. Furthermore, there are studies ( #1, #2, #3, #4) linking cosmic rays with cardiac arrhythmias and sudden cardiac death in the general population. Our latest measurements show that cosmic rays are intensifying, with an increase of more than 13% since 2015:


Why are cosmic rays intensifying? The main reason is the sun. Solar storm clouds such as coronal mass ejections (CMEs) sweep aside cosmic rays when they pass by Earth. During Solar Maximum, CMEs are abundant and cosmic rays are held at bay. Now, however, the solar cycle is swinging toward Solar Minimum, allowing cosmic rays to return. Another reason could be the weakening of Earth's magnetic field, which helps protect us from deep-space radiation.

The radiation sensors onboard our helium balloons detect X-rays and gamma-rays in the energy range 10 keV to 20 MeV. These energies span the range of medical X-ray machines and airport security scanners.

The data points in the graph above correspond to the peak of the Reneger-Pfotzer maximum, which lies about 67,000 feet above central California. When cosmic rays crash into Earth's atmosphere, they produce a spray of secondary particles that is most intense at the entrance to the stratosphere. Physicists Eric Reneger and Georg Pfotzer discovered the maximum using balloons in the 1930s and it is what we are measuring today.

  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
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NOAA 27-Day Space Weather Forecasts
  fun to read, but should be taken with a grain of salt! Forecasts looking ahead more than a few days are often wrong.
Aurora 30 min forecast
  from the NOAA Space Environment Center
Heliophysics
  the underlying science of space weather
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