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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: 431.3 km/sec
density: 2.0 protons/cm3
explanation | more data
Updated: Today at 2346 UT
X-ray Solar Flares
6-hr max: B1
1900 UT Feb18
24-hr: B1
1135 UT Feb18
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 18 Feb. 10
New sunspot 1049 is growing but does not yet pose a threat for strong solar flares. Image credit: SOHO/MDI
Sunspot number: 49
What is the sunspot number?
Updated 17 Feb 2010

Spotless Days
Current Stretch: 0 days
2010 total: 2 days (4%)
2009 total: 260 days (71%)
Since 2004: 772 days
Typical Solar Min: 485 days
explanation | more info
Updated 17 Feb 2010


The Radio Sun
10.7 cm flux: 87 sfu
explanation | more data
Updated 17 Feb 2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 8.3 nT
Bz: 4.3 nT north
explanation | more data
Updated: Today at 2151 UT
Coronal Holes:
There are no large coronal holes on the Earth-facing side of the sun. Credit: SOHO Extreme UV Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Feb 18 2201 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
05 %
05 %
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: 2010 Feb 18 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
25 %
15 %
MINOR
10 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
30 %
20 %
MINOR
15 %
10 %
SEVERE
01 %
01 %
What's up in Space
February 18, 2010

SATELLITE FLYBYS APP: Turn your iPhone or iPod into a field-tested satellite tracker! Spaceweather.com presents the Satellite Flybys app.

 

3D SUN FOR THE iPHONE: Imagine holding the entire sun in the palm of your hand. Now you can. A new iPhone app developed by NASA-supported programmers delivers a live global view of the sun directly to your cell phone. Get the full story from Science@NASA.

NORTHERN LIGHTS: All week long, the Arctic Circle has been aglow with auroras. "The lights have been incredibly bright and active," says Øystein Lunde Ingvaldsen of Bø i Vesterålen, Norway. He took this picture on Feb. 17th:

"This has been a very nice month for auroras," agrees Wioleta Zarzycka of Iceland, where coastal waters have been turning green in reflection of the sky above. The lights have even descended as far south as Scotland. "On Monday night, we had the first auroras I have seen here in years," reports Gordon Mackay of Campsie Fells.

All this activity is a sign that the sun is coming back to life after a long, deep solar minimum. Sunspots have returned crackling with solar flares, and coronal mass ejections (CMEs) are once again buffeting Earth's magnetic field. NOAA forecasters estimate a 25% to 30% chance of more geomagnetic activity tonight.

UPDATED: February Northern Lights Gallery
[previous Februarys: 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 February 18, 2010 there were 1100 potentially hazardous asteroids.
Feb. 2010 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2009 UN3
Feb. 9
14.3 LD
12
1.2 km
2010 CK19
Feb. 17
0.9 LD
17
11 m
2001 FD58
Feb. 19
58.5 LD
17
0.9 km
2010 CJ18
Feb. 19
3.3 LD
18
20 m
2002 EZ11
Feb. 24
77.5 LD
18
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 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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