Space Weather Update: 08/31/2016
By Spaceweather.com, 08/31/2016
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:
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 galleryfor sightings. Aurora alerts: text or voice
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 thatentanglement can exist between particles separated by orbital distances.
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 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:Asteroid
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.
speed: 440.2 km/sec
density: 6.7 protons/cm3
explanation | more data
Updated: Today at 2015 UTX-ray Solar Flares
6-hr max: B6 1446 UT Aug31
24-hr: C1 0819 UT Aug31
explanation | more data
Updated: Today at: 2000 UTDaily Sun: 30 Aug 16Sunspot complex AR2582-2583 is crackling with minor C-class solar flares. Other than that, solar activity is very low. Credit: SDO/HMI
Sunspot number: 64
What is the sunspot number?
Updated 30 Aug 2016
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 30 Aug 2016
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/OvationPlanetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 4 unsettled
explanation | more data
Interplanetary Mag. Field
Btotal: 6.4 nT
Bz: 5.1 nT south
explanation | more data
Updated: Today at 2014 UTCoronal 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, PolarUpdated at: 08-06-2016 16:55:02
Updated at: 2016 Aug 30 2200 UTC
Probabilities for significant disturbances in Earth’s magnetic field are given for three activity levels: active, minor storm, severe stormUpdated at: 2016 Aug 30 2200 UTCMid-latitudes