You are viewing the page for Sep. 5, 2012
  Select another date:
<<back forward>>
SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 437.4 km/sec
density: 12.0 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: C1
2010 UT Sep05
24-hr: C7
0806 UT Sep05
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 04 Sep 12
Sunspot 1564 is suddenly growing. It has a 'beta-gamma' magnetic field that harbors energy for M-class solar flares. Credit: SDO/HMI
Sunspot number: 150
What is the sunspot number?
Updated 05 Sep 2012

Spotless Days
Current Stretch: 0 days
2012 total: 0 days (0%)
2011 total: 2 days (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
Since 2004: 821 days
Typical Solar Min: 486 days

Update 05 Sep 2012


The Radio Sun
10.7 cm flux: 138 sfu
explanation | more data
Updated 05 Sep 2012

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 3 quiet
24-hr max: Kp= 6
storm
explanation | more data
Interplanetary Mag. Field
Btotal: 6.0 nT
Bz: 3.6 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 04 Sep 12
There are no large coronal holes on the Earthside of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2012 Sep 05 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
25 %
25 %
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: 2012 Sep 05 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
05 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
20 %
25 %
SEVERE
25 %
20 %
 
Wednesday, Sep. 5, 2012
What's up in space
 

Listen to radar echoes from satellites and meteors, live on listener-supported Space Weather Radio.

 
Spaceweather Radio is on the air

NEAR-EARTH ASTEROID: A relatively large asteroid, just discovered on August 28th, will fly past the Earth-Moon system on Sept 14th only 2.8 million km (7.4 lunar distances) away. 2012 QG42 is about as wide as three football fields and comes to us from just beyond the orbit of Mars. Astronomers who are now monitoring the space rock say it shines about as brightly as a 15th magnitude star. [3D orbit] [ephemeris]

MORE STORMING: Earth's polar magnetic field remains stormy and unsettled after the CME impact of Sept. 3rd. Today began with a moderately strong (Kp=6) geomagnetic storm, which sparked bright auroras around the Arctic Circle. Jónína Óskarsdóttir sends this picture of the display from Faskrudsfjordur, Iceland:

"After a long summer with the midnight sun, I'm so happy to see the auroras again," says Óskarsdóttir. "I'm looking forward to all the sleepless nights ahead."

Stay tuned to the aurora gallery for new photos of the storm. Aurora alerts: text, phone.

Realtime Aurora Photo Gallery

THE SOURCE OF THE ACTION: The ongoing geomagnetic storms were caused, originally, by an eruption on the sun. NASA has just released new high-resolution images of the giant magnetic filament that snapped on August 31st:

Each panel shows the eruption in a different wavelength of extreme ultraviolet light. By comparing the colors, which trace different temperatures and densities of solar plasma, researchers can learn more about the dynamics of filaments--and maybe one day to predict when they will erupt.

The blast hurled a coronal mass ejection (CME) not-quite-directly toward Earth. A glancing blow from the cloud on Sept. 3rd set in motion the current spate of geomagnetic storms. Solar Flare alerts: text, phone.

Realtime Space Weather Photo Gallery


Realtime Noctilucent Cloud Photo Gallery
[previous years: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011]

  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 September 5, 2012 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2012 QZ16
Aug 30
7 LD
--
33 m
2012 QG42
Sep 14
7.4 LD
--
345 m
2012 QC8
Sep 14
22.7 LD
--
1.1 km
1998 UO1
Oct 4
60.1 LD
--
2.1 km
2005 GQ21
Oct 12
77 LD
--
1.0 km
1998 ST49
Oct 18
28.7 LD
--
1.3 km
1991 VE
Oct 26
34 LD
--
1.1 km
2012 QF49
Oct 29
77.7 LD
--
1.6 km
2001 CV26
Oct 30
68 LD
--
2.4 km
2007 PA8
Nov 5
16.8 LD
--
2.4 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
Trade Show Displays
   
  more links...
©2010 Spaceweather.com. All rights reserved. This site is penned daily by Dr. Tony Phillips.
©2013 Spaceweather.com. All rights reserved.