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Solar wind
speed: 255.3 km/sec
density: 2.3 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: M3
2021 UT Aug25
24-hr: M3
2021 UT Aug25
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 25 Aug 14
Sunspot AR2149 has a 'beta-gamma-delta' magnetic field that harbors energy for X-class solar flares. Credit: SDO/HMI
Sunspot number: 128
What is the sunspot number?
Updated 25 Aug 2014

Spotless Days
Current Stretch: 0 days
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%)

Update
25 Aug 2014

The Radio Sun
10.7 cm flux: 141 sfu
explanation | more data
Updated 25 Aug 2014

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 1
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 1.9 nT
Bz: 0.3 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 25 Aug 14
There are no large coronal holes on the Earthside of the sun. Credit: SDO/AIA.

Spaceweather.com posts daily satellite images of noctilucent clouds (NLCs), which hover over Earth's poles at the edge of space. The data come from NASA's AIM spacecraft. The north polar "daisy" pictured below is a composite of near-realtime images from AIM assembled by researchers at the University of Colorado's Laboratory for Atmospheric and Space Physics (LASP).
Noctilucent Clouds
Switch view: Europe, USA, Asia, Polar
Updated at: 08-25-2014 11:55:07
SPACE WEATHER
NOAA Forecasts
Updated at: 2014 Aug 25 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
55 %
55 %
CLASS X
10 %
10 %
Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at: 2014 Aug 25 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
35 %
30 %
MINOR
20 %
15 %
SEVERE
05 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
20 %
20 %
SEVERE
15 %
20 %
 
Monday, Aug. 25, 2014
What's up in space
 

When is the best time to see auroras? Where is the best place to go? And how do you photograph them? These questions and more are answered in a new book, Northern Lights - a Guide, by Pal Brekke & Fredrik Broms.

 
Northern Lights - a Guide

SOLAR FLARE AND CME: An M2-class explosion in the magnetic canopy of sunspot AR2146 has hurled a bright CME into space on August 25th at 1511 UT. Although the storm cloud is well off the sun-Earth line, our planet might receive a glancing blow on Aug. 28-29. With another CME already en route, due to arrrive tomorrow, Earth could experience minor geomagnetic storming throughout the period Aug. 26-29. Aurora alerts: text, voice

STRATOSPHERIC SPACE WEATHER BUOY: Have you ever wondered what a lunchbox suspended 112,000 feet above Earth's surface would look like? The answer is, this:

This is actually a Space Weather Buoy--a lunchbox containing a cosmic ray detector, cameras, GPS trackers, a thermometer and other sensors. It flew to the stratosphere on August 22nd tethered to a suborbital helium balloon. In collaboration with Spaceweather.com, the students of Earth to Sky Calculus have been launching these buoys on a regular basis to study the effect of solar activity on Earth's upper atmosphere. Soon, they will release results from a year-long campaign covering altitudes of interest to aviation, space tourism, and ozone research.

The students wish to thank Eden Botanicals for sponsoring the August 22nd flight. (Note their logo on the corner of the payload.) This was the student group's 58th successful launch--almost all paid for by a combination of donations and commercial advertising.

Readers, would you like to sponsor the next flight of the Space Weather Buoy? For only $500 you can send your logo to the edge of space and help students continue their explorations of the stratosphere. Contact Dr. Tony Phillips for more information.

Realtime Space Weather Photo Gallery

"M" FOR MAGNIFICENT: In the vocabulary of space weather, an "M-flare" is a medium-sized explosion. Yesterday it had a different meaning: magnificent. On August 24th at 12:17 UT, NASA's Solar Dynamics Observatory recorded this M5.6-category explosion near the eastern limb of the sun:

The source of the blast was sunspot AR2151. As the movie shows, an instability in the suspot's magnetic canopy hurled a dense plume of plasma into space. If that plasma cloud were to hit Earth, the likely result would be strong geomagnetic storms. However, because of the sunspot's location near the edge of the solar disk, Earth was not in the line of fire.

Even so, the flare did produce some Earth effects. A pulse of extreme UV radiation from the explosion partially ionized our planet's upper atmosphere, resulting in a Sudden Ionospheric Disturbance (SID). Waves of ionization altered the normal propagation of VLF (very low frequency) radio transmissions over the the dayside of Earth, an effect recorded at the Polarlightcenter in Lofoten, Norway: data.

Sunspot AR2151 will turn toward Earth in the days ahead, which means subsequent explosions could be more geoeffective. Follow the action @spaceweatherman

Realtime Aurora Photo Gallery


Realtime Comet Photo Gallery


Realtime Meteor Photo Gallery


Realtime NLC 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 Aug. 25, 2014, the network reported 7 fireballs.
(7 sporadics)

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 25, 2014 there were 1495 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2014 QY33
Aug 30
6.5 LD
23 m
2013 RZ53
Sep 9
1.9 LD
3 m
2002 CE26
Sep 9
47.9 LD
1.8 km
2009 RR
Sep 16
2 LD
34 m
2006 GQ2
Sep 19
65.9 LD
1.1 km
2009 FG19
Sep 26
34.6 LD
1.1 km
2014 NE52
Sep 30
61.2 LD
1.1 km
2001 EA16
Oct 7
35.5 LD
1.9 km
2011 TB4
Oct 9
5.8 LD
34 m
2003 UC20
Oct 31
52.4 LD
1.0 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
Heliophysics
  the underlying science of space weather
Space Weather Alerts
   
  more links...
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