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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
SPACE WEATHER
Current conditions
Solar wind
speed: 549.8 km/sec
density: 0.4 protons/cm3
explanation | more data
Updated: Today at 2344 UT
X-ray Solar Flares
6-hr max: A0
2340 UT Mar13
24-hr: A0
2340 UT Mar13
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 13 Mar 09
The sun is blank--no sunspots. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 11 Mar. 2009
Far side of the Sun:
This holographic image reveals no sunspots on the far side of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 5
storm
explanation | more data
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
What is the auroral oval?
Interplanetary Mag. Field
Btotal: 3.5 nT
Bz: 2.1 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole is buffeting Earth's magnetic field. Credit: SOHO Extreme UV Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2009 Mar 13 2201 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: 2009 Mar 13 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
10 %
MINOR
10 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
30 %
15 %
MINOR
20 %
05 %
SEVERE
05 %
01 %
What's up in Space
March 13, 2009

AURORA ALERT: Did you sleep through the Northern Lights? Next time get a wake-up call: Spaceweather PHONE.

 

DISCOVERY LAUNCH UPDATE: NASA engineers say they understand why space shuttle Discovery sprung a hydrogen leak on March 11th. Replacing a faulty junction in the shuttle's hydrogen vent line should solve the problem, putting Discovery back on track for a March 15th launch from Kennedy Space Center at 7:43 pm EDT. Stay tuned for updates.

GEOMAGNETIC STORM: A solar wind stream hit Earth last light, sparking a magnetic storm around the Arctic Circle. Rune Christianse sends this picture from Nuuk, Greenland:

"The Northern Lights were bright and quick-shifting," he says. "I photographed the display using my Canon 5D."

High-latitude sky watchers should be alert for more auroras tonight as the solar wind continues to blow. NOAA forecasters estimate a 30% chance of geomagnetic activity during the next 24 hours.

UPDATED: March 2009 Aurora Gallery
[previous Marches: 2008, 2007, 2006, 2005, 2004, 2003, 2002]

TITAN TRANSIT: Last night, March 12th, Saturn's giant moon Titan cast its shadow on the ringed planet's cloudtops. In the Phillipines, astrophotographer Christopher Go was waiting and took this well-timed shot through his 11-inch Celestron:


Click to view the movie

"Titan skimmed over Saturn's north pole with its shadow following behind," says Go. The ruddy disk of Titan is located just above the much darker shadow, he points out. "Also, I was also to capture the EZn white spot--a pale storm raging near Saturn's equator." To see it, play the movie.


Explore the Sunspot Cycle

       
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 13, 2009 there were 1037 potentially hazardous asteroids.
March 2009 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2009 DS43
Mar. 1
6.9 LD
18
32 m
2009 DD45
Mar. 2
0.2 LD
11
35 m
2009 DN4
Mar. 3
8.1 LD
21
27 m
2009 EA
Mar. 4
7.4 LD
19
24 m
2009 EW
Mar. 6
0.9 LD
16
23 m
161989 Cacus
Mar. 7
70.5 LD
16
1.7 km
2009 EH1
Mar. 8
1.6 LD
18
12 m
2009 ET
Mar. 9
9.5 LD
21
15 m
2009 DV43
Mar. 10
8.5 LD
18
80 m
2009 EU
Mar. 11
3.5 LD
18
21 m
1998 OR2
Mar. 12
69.8 LD
14
3.3 km
2009 DR3
Mar. 14
7.2 LD
16
225 m
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 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 and Heliospheric Observatory
  Realtime and archival images of the Sun from SOHO.
STEREO
  3D views of the sun from NASA's Solar and Terrestrial Relations Observatory
Daily Sunspot Summaries
  from the NOAA Space Environment Center
Current Solar Images
  from the National Solar Data Analysis Center
Science Central
   
  more links...
   
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