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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 398.6 km/sec
density: 2.2 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: M3
1746 UT Mar02
24-hr: M3
1746 UT Mar02
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 02 Mar 12
New sunspot 1427 poses no threat for strong flares. Solar activity remains low. Credit: SDO/HMI
Sunspot number: 24
What is the sunspot number?
Updated 01 Mar 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

Updated 01 Mar 2012


The Radio Sun
10.7 cm flux: 103 sfu
explanation | more data
Updated 01 Mar 2012

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 3
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 6.0 nT
Bz: 4.4 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 02 Mar 12
A solar wind stream flowing from this minor coronal hole could reach Earth on March 4-5. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2012 Mar 02 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
55 %
55 %
CLASS X
05 %
05 %
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 Mar 02 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
05 %
MINOR
05 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
15 %
MINOR
15 %
10 %
SEVERE
05 %
01 %
 
Friday, Mar. 2, 2012
What's up in space
 

Metallic photos of the sun by renowned photographer Greg Piepol bring together the best of art and science. Buy one or a whole set. They make a stellar gift.

 
Metallic pictures of the Sun

FLYING THROUGH A GEOMAGNETIC STORM: Lately, the International Space Station has been flying through geomagnetic storms, giving astronauts a close-up view of the aurora borealis just outside their windows. ISS Flight Engineer Don Pettit shares the experience in a new video from Science@NASA.

FIRST AURORAS OF MARCH: A magnetic disturbance rippled around the Arctic Circle during the waning hours of March 1st, sparking bright auroras just as night fell over northern Europe. "The show was stunning and amazing," says Thomas Albin, who sends this picture from Esrange, Sweden:

"There were three different colors visible and the dynamics of the lights were incredible!" he says.

A medium-speed solar wind stream is buffeting Earth's magnetic field. By itself, this was not enough to explain what happened. The extra ingrediant was the IMF: the interplanetary magnetic field near Earth tilted south, opening a crack in our planet's magnetosphere. Solar wind poured in and fueled the display.

NOAA forecasters estimate a 15% to 25% chance of polar geomagnetic storms during the next 24 hours. High-latitude sky watchers should remain alert for auroras. Aurora alerts: text, phone.

more images: from Peter Rosén of Kiruna, Swedish Lapland; from Chad Blakley of Abisko Touriststation, Abisko National Park, Sweden; from Lee Petersen of Fairbanks, Alaska; from Timothy Boocock of Trysil, Norway;

BLUE FLASH: We've all heard of the green flash, the fleeting emerald light that sometimes appears just above the setting sun. Once thought to be a fable, the green flash was popularized by Jules Verne in his 1882 novel "Le Rayon Vert" (The Green Ray). Now it is generally known to be real.

But what of the even rarer blue flash? Turns out, that's real too. Peter Rosén photographed one from Stockholm, Sweden, on Feb. 29th:

"I was shooting the sunset when, suddenly, just as the sun was about to disappear behind the treetops, there was a mighty blue flash," says Rosén.

Blues flashes are formed in the same way as green flashes: a mirage magnifies tiny differences in the atmospheric refraction of red, green and blue light. Blue flashes are generally harder to see than green flashes, because blue flashes blend into the surrounding blue sky. When the air is exceptionally clear, however, the blue flash emerges.

Verne described the green flash as something "which no artist could ever obtain on his palette, a green of which neither the varied tints of vegetation nor the shades of the most limpid sea could ever produce the like! If there is a green in Paradise, it cannot be but of this shade, which most surely is the true green of Hope."

Ditto the blue.


February 2012 Aurora Gallery
[previous Februaries: 2011, 2010, 2009, 2008, 2007, 2006, 2004, 2003, 2002]

  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 March 2, 2012 there were 1287 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2012 CS46
Feb 25
2.7 LD
--
12 m
2012 DS32
Mar 1
1.9 LD
--
24 m
2012 DN31
Mar 1
8 LD
--
79 m
2012 DR32
Mar 2
8.7 LD
--
51 m
2012 EA
Mar 3
2.6 LD
--
18 m
2012 DU60
Mar 3
9.1 LD
--
35 m
2008 EJ85
Mar 6
9.1 LD
--
44 m
2012 DH54
Mar 10
3.4 LD
--
13 m
2012 DW60
Mar 12
2.5 LD
--
24 m
1999 RD32
Mar 14
57.9 LD
--
2.4 km
2011 YU62
Mar 16
73.4 LD
--
1.3 km
1996 SK
Apr 18
67.2 LD
--
1.6 km
2007 HV4
Apr 19
4.8 LD
--
8 m
2011 WV134
Apr 28
38.6 LD
--
1.8 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...
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