 |
|
Solar wind
speed: 403.4
km/sec
density: 6.7
protons/cm3
more data: ACE, DSCOVR
Updated: Today at 2006
UT
X-ray Solar Flares
6-hr max: A7
1321
UT
Aug10
24-hr:
A7
1321
UT
Aug10
explanation
| more
data
Updated: Today at: 1900
UT
Daily Sun: 10 Aug 17
Sunspot AR2670 has a stable magnetic field that poses little threat for solar flares. Credit: SDO/HMI
Sunspot number:
11
What
is the sunspot number?
Updated 10 Aug 2017
Spotless Days
Current Stretch: 0 days
2017 total: 56 days (25%)
2016 total: 32 days (9%)
2015 total: 0 days (0%)
2014 total: 1 day (<1 br="">
2013 total: 0 days (0%)
2012 total: 0 days (0%)
2011 total: 2 days (<1 br="">
2010 total: 51 days (14%)
2009 total: 260 days (71%)
Updated 10 Aug 2017
The Radio
Sun
10.7 cm flux: 72 sfu
explanation
| more
data
Updated 10 Aug 2017
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 quiet
explanation | more
data
Interplanetary Mag. Field
Btotal: 4.6
nT
Bz: 0.8
nT north
more data: ACE, DSCOVR
Updated: Today at 2006
UT
Coronal Holes: 10 Aug 17
Solar wind flowing from this donut-shaped
coronal hole could reach Earth on Aug. 11-12. Credit: NASA/SDO.
Noctilucent Clouds They're
back! Images of noctilucent clouds from NASA's AIM spacecraft are
available again. The spacecraft's orbit had recently changed, requiring a
new way to point AIM's science instruments. This problem has now been
solved, and "daily daisies" have returned to Spaceweather.com.
Switch view: Europe, USA, Asia, Polar
Updated at: 08-10-2017 16:55:06
SPACE WEATHER
NOAA Forecasts |
|
Updated at: 2017 Aug 09 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 Aug 09 2200 UTC
Mid-latitudes
|
0-24
hr
|
24-48
hr
|
ACTIVE
|
10
%
|
20
%
|
MINOR
|
01
%
|
05
%
|
SEVERE
|
01
%
|
01
%
|
High latitudes
|
0-24
hr
|
24-48
hr
|
ACTIVE
|
15
%
|
15
%
|
MINOR
|
20
%
|
30
%
|
SEVERE
|
15
%
|
30
%
|
|
|
|
 |
|
|
|
|
|
|
|
|
| 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!
|
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|
CASSINI DIVES TOWARD SATURN: Next
month, NASA's Cassini spacecraft will end its 13-year mission to
Saturn by plunging into the body of the ringed planet. But first....
Cassini is going to skim the atmosphere of Saturn five times. This will
alter the spacecraft's orbit in preparation for its suicide plunge
while giving researchers an opportunity for point-blank study of the
planet's gases. The first graze occurs on Aug. 14th. Get the full story from JPL.
A HOLE IN THE SUN'S ATMOSPHERE: A
hole has opened in the sun's atmosphere and it is turning toward
Earth. NASA's Solar Dynamics Observatory is monitoring the structure,
which straddles the sun's equator just behind sunspot AR2670:
This is a "coronal hole", a region where
the sun's magnetic field has peeled back and allowed gaseous material
to escape. A stream of solar wind flowing from this hole should reach
our planet during the early hours of August 12th. Enhanced magnetic
fields at the leading edge of the stream will interact with our
planet's magnetosphere, possibly sparking mild geomagnetic storms.
Coincidentally, the solar wind will arrive
during the peak of the Perseid meteor shower. High-latitude sky
watchers might detect the green glow of auroras in their photos of
disintegrating meteoroids. Free: Aurora Alerts
SOLAR ECLIPSE IN A VEGETABLE STEAMER: During the Great American Solar Eclipse
on Aug. 21, 2017, only a narrow slice of the USA will experience
totality--the magical moment when the disk of the Moon completely
covers the sun. The rest of the country will see a partial eclipse.
But wait. How do you actually see it? Believe it or not, you
probably already own a partial solar eclipse viewer. Just go into your
kitchen and find the vegetable steamer. John Stetson of Maine
demonstrates:
"During the eclipse on the 21st, sunbeams
projected through holes in the steamer will appear as crescents,"
says Stetson. "It will be a good day to walk around with your
vegetable steamer."
"The Chinese were the first to record the use of pinhole projection to
observe eclipses in 500 BCE," he adds. "At the beginning of Western
Civilization, Aristotle also wrote about this phenomenon."
Don;t have a vegetable steamer? Colanders
work, too! Even a tree will do the trick. Sunbeams lancing through
gaps in the leafy canopy form crescent shaped spots on sidewalks and
other surfaces. " Here is my son,
Charley, standing behind a bush on June 10, 2002 during a partial
eclipse," says Stetson. "Crescents may be seen projected onto his
shirt."
SOLAR ECLIPSE PENDANTS: Would you like to support our Solar Eclipse Balloon Network? Here's
one way: Buy a space pendant. This solar eclipse-themed necklace flew
to the stratosphere on July 2, 2017, attached to the payload of an
Earth to Sky Calculus space weather balloon:
The payload contained more just like it. If you buy one now for $89.95,
we will fly it back to the stratosphere during the Great American
Solar Eclipse on August 21, 2017, where it will be enveloped by the
Moon's cool shadow above our launch site in Oregon. No additional
charge! Just make a note in the COMMENTS BOX of the shopping cart:
"Please fly my pendant into the eclipse!" Each pendant comes with a
greeting card showing the jewelry in flight and telling the story of its
journey to the stratosphere and back again.
More items from the edge of space may be found in the Earth to Sky Store. All proceeds support atmospheric radiation monitoring and hands-on STEM education.
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. 10, 2017, the network reported 38 fireballs.
(24 sporadics, 12 Perseids, 1 Southern delta Aquariid, 1 alpha Capricornid)
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]
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 10, 2017 there were 1803
potentially hazardous asteroids.
 |
Recent
& Upcoming Earth-asteroid encounters:
| Asteroid |
Date(UT)
|
Miss Distance
|
Velocity (km/s)
|
Diameter (m)
|
| 2011 CC22 |
2017-Aug-04
|
15.5 LD
|
18.4
|
186
|
| 2017 NB7 |
2017-Aug-06
|
6.9 LD
|
6
|
80
|
| 2017 OF7 |
2017-Aug-10
|
19.2 LD
|
8.2
|
87
|
| 2014 OA339 |
2017-Aug-13
|
12.3 LD
|
10
|
47
|
| 2017 PE |
2017-Aug-24
|
19.5 LD
|
7.1
|
46
|
| 3122 |
2017-Sep-01
|
18.5 LD
|
13.5
|
5376
|
| 2014 RC |
2017-Sep-11
|
15.1 LD
|
8.9
|
16
|
| 1989 VB |
2017-Sep-29
|
7.9 LD
|
6.3
|
408
|
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.
|
The
official U.S. government space weather bureau |
|
The
first place to look for information about sundogs,
pillars, rainbows and related phenomena. |
|
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 |
|
Realtime
and archival images of the Sun from SOHO. |
|
from
the NOAA Space Environment Center |
|
a proud supporter of science education and Spaceweather.com |
|
fun to read, but should be taken with a grain of salt! Forecasts looking ahead more than a few days are often wrong. |
|
from the NOAA Space Environment Center |
|
the
underlying science of space weather |
 |
Beautyz for top beauty products reviews and their buying guides |
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Reviews here can help you to pick up best memory foam mattresses. |
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