Solar wind
speed: 429.2 km/sec
density: 6.0 protons/cm3
explanation | more data
Updated: Today at 2211 UT
X-ray Solar Flares
6-hr max: C2
2019 UT Aug31
24-hr: C2
2019 UT Aug31
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 31 Aug 16
A new and possibly large sunspot is emerging at the circled location. Credit: SDO/HMI

Sunspot number: 64
What is the sunspot number?
Updated 31 Aug 2016

Spotless Days
Current Stretch: 0 days
2016 total: 20 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 31 Aug 2016


The Radio Sun
10.7 cm flux: 100 sfu
explanation | more data
Updated 31 Aug 2016

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 3 quiet
24-hr max: Kp= 3
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 6.2 nT
Bz: 1.2 nT south
explanation | more data
Updated: Today at 2212 UT
Coronal Holes: 30 Aug 16

Solar wind flowing from the indicated minor coronal hole could reach Earth on Aug. 30-31. Credit: NASA/SDO.
Noctilucent Clouds NASA's AIM spacecraft has suffered an anomaly, and a software patch is required to fix it. As a result, current noctilucent cloud images will not return until late September 2016.
Switch view: Europe, USA, Asia, Polar
Updated at: 08-06-2016 16:55:02
SPACE WEATHER
NOAA Forecasts
Updated at: 2016 Aug 31 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
10 %
20 %
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: 2016 Aug 31 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
15 %
MINOR
05 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
20 %
15 %
SEVERE
15 %
05 %
 
Wednesday, Aug. 31, 2016
What's up in space
       
 

Directly under the Arctic Circle! Marianne's Arctic Xpress in Tromsø offers fjord, whale and wildlife tours by day, aurora tours by night. Book Now and get a 10% discount on combo day and night adventures.

 

AFRICAN SOLAR ECLIPSE: Sky watchers in more than 50 African countries are about to witness a solar eclipse. On Thursday, Sept.1st, the Moon will pass in front of the sun, covering as much as 97% of the solar disk. Click on the image to view an animated eclipse map created by Larry Koehn of ShadowandSubstance.com:

This is not a total eclipse, but rather an annular one, in which maximum coverage leaves a thin strip of sun shining around the lunar limb. The narrow path of annularity snakes across Gabon, Republic of Congo, Democratic Republic of Congo, Tanzania, Mozambique, and Madagascar. For as much as three minutes, people in those countries can see the "ring of fire":


Photo copyright and credit: Dennis L. Mammana

Outside the path of annularity, the eclipse will be partial. This means the sun will turn into a crescent. Observers in the eclipse zone should look at the sun-dappled ground beneath leafy trees for a unique view of the shadows. The sight of a thousand crescent-shaped sunbeams swaying back and forth on a grassy lawn or sidewalk is unforgettable.

Monitor the solar eclipse gallery for images from Africa:

Realtime Solar Eclipse Photo Gallery

ROOM WITH A VIEW: Eric Fokke is renovating his summer house in Norway. What's wrong with it? The window's not big enough. He can only see this much aurora:

It might look like a framed painting, but it's not. This was the actual view through Fokke's living room window last night, Aug. 30th.

"Next week we get a new and bigger window," says Fokke. "That's going to give stunning views over the Gimsøystraumen and Northern Lights from the sofa. Of course," he allows, "last night wasn't bad."

More lights could be in the offing on Aug. 31st. The same stream of solar wind that filled Fokke's window with auroras last night is still active. Monitor the photo gallery for sightings. Aurora alerts: text or voice

Realtime Aurora Photo Gallery

CHINESE QUANTUM PHYSICS SATELLITE: On Aug. 16th, the Chinese space agency launched a new kind of satellite from the Gobi Desert in Mongolia. Nicknamed "Micius," after 5th century Chinese philosopher, the Quantum Experiments at Space Scale mission intends to establish an un-crackable quantum communications network and to test exotic theories of quantum teleportation.  This extraordinary picture taken by Yingwei Chen just a few days ago shows that Micius is working:

"In the early morning of Aug. 27th, I photographed an alignment test between the satellite and a telescope at the Xinglong Observation Station," explains Chen. "This is one of the five stations used for communicating with Micius. The telescope sends up a red laser beam to the satellite. Once the red laser is received, the satellite responds with a green laser beam. The telescope captures the beam and feeds it into an optical fiber if successful communication is established. The whole send-and receive process takes less than 3 seconds. In the picture, the red light has a wavelength of 671 nm and the green light has a wavelength of 532 nm."

One of the main goals of Micius will be to demonstrate quantum key distribution (QKD) between the satellite and stations on the ground. A quantum key is a string of ones and zeros, representing the quantum states of particles. These can be used to encode and decode hack-proof messages.

Another goal is to test some of the strange theories of quantum physics. For instance, Chinese physicists will attempt to quantum teleport a photon state from the Ali observatory on the Tibetan Plateau to the satellite, proving if successful that entanglement can exist between particles separated by orbital distances.

Realtime Space Weather Photo Gallery


Realtime Aurora Photo Gallery


Realtime Sprite Photo Gallery



  Cosmic Rays in the Atmosphere

Updated
: Aug. 30, 2016 // Next Flight: Sept. 2, 2016

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 almost 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.

THIS RESEARCH IS CROWD-FUNDED: The cosmic ray research presented on Spaceweather.com is done by students, driven by curiosity, and funded entirely by readers.  Our latest flight over California on Aug. 21st was sponsored by World Tech Toys of Valencia CA.  In exchange for their generous donation of $750, we flew a toy Striker Drone to the edge of space:

HD video and poster-quality images of the drone in space are now being used by World Tech Toys for marketing and outreach--an out-of-this-world bargain.

Our next flights on Sept. 2nd and Sept. 10th need sponsors. Would you like to assist?  Contact Dr. Tony Phillips to make arrangements.

  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 Aug. 31, 2016, the network reported 20 fireballs.
(19 sporadics, 1 Northern iota Aquariid)

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 August 31, 2016 there were 1726 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2016 PS26
Aug 25
13.8 LD
34 m
2016 QA2
Aug 28
0.2 LD
40 m
2016 PA40
Aug 29
14.5 LD
54 m
2016 QB11
Aug 31
3.5 LD
30 m
2004 BO41
Sep 7
38.9 LD
1.1 km
2015 KE
Sep 10
14.9 LD
23 m
2009 UG
Sep 30
7.3 LD
101 m
2100 Ra-Shalom
Oct 9
58.3 LD
1.1 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.
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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