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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 331.1 km/sec
density: 1.4 protons/cm3
explanation | more data
Updated: Today at 2208 UT
X-ray Solar Flares
6-hr max: B3
2016 UT Mar19
24-hr: B3
2016 UT Mar19
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 19 Mar 11
New sunspot 1175 is growing rapidly, but so far it poses no threat for strong flares. Credit: SDO/HMI
Sunspot number: 35
What is the sunspot number?
Updated 18 Mar 2011

Spotless Days
Current Stretch: 0 days
2011 total: 1 day (1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
Since 2004: 820 days
Typical Solar Min: 486 days

Updated 18 Mar 2011


The Radio Sun
10.7 cm flux: 88 sfu
explanation | more data
Updated 18 Mar 2011

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 3.4 nT
Bz: 2.4 nT south
explanation | more data
Updated: Today at 2209 UT
Coronal Holes: 19 Mar 11
A solar wind stream flowing from this minor coronal hole could reach Earth on or about March 23rd. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2011 Mar 19 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
01 %
10 %
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: 2011 Mar 19 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
 
Saturday, Mar. 19, 2011
What's up in space
 

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Satellite flybys

ICONIC ERUPTION: A huge filament of magnetism and hot plasma blasted off the sun's southwestern limb today, March 19th, at around 1200 UT. The eruption was not Earth-directed, but it was iconic. Just look at this snapshot recorded by NASA's Solar Dynamics Observatory:


Click to view a full-disk, high-resolution image

Many amateur astronomers in Europe witnessed the blast and said it was the biggest one they'd ever seen. This event continues the recent trend of increasing solar activity, and shows anew that Solar Cycle 24 is gaining steam after a long period of relative quiet.

more images: from P-M Hedén of Vallentuna, Sweden; from Sebastien Kersten of Le Cocq, Belgium; from Steve Wainwright of Gower S.Wales UK; from Strikis Iakovos - Marios of Athens Greece; from Günther Strauch of Borken, NRW, Germany; from Peter Desypris of Athens,Greece; from Emiel Veldhuis of Zwolle, the Netherlands;

SUPER MOON: Watch out for the Moon on Saturday night. It's the biggest full Moon in 18 years. Astronomers call it a "perigee Moon," and it raises extra-high perigean tides. Contrary to some reports, however, this event will not trigger any natural disasters. Science@NASA has the full story.

On March 18th, "Supermoon's Eve," something told Tom Wagner he should stop for a quick photo of the waxing lunar disk:

"I can't wait to see the real thing on March 19th," he says.

more moonshots: from Rick Ellis of Toronto, Canada; from Anthony Ayiomamitis of Athens, Greece; from David Dickinson of Hudson, Florida; from John Stetson of Fort Williams Park, Cape Elizabeth, Maine; from Martin McKenna of Maghera, Co. Derry, Ireland; from Mark Seibold of Sandy, Oregon;


March 2011 Aurora Photo Gallery
[previous Marches: 2010, 2009, 2008, 2007, 2006, 2005, 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 19, 2011 there were 1204 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2011 EB74
Mar 16
0.9 LD
--
18 m
2011 BE38
Apr 10
48 LD
--
1.0 km
2002 DB4
Apr 15
62.5 LD
--
2.2 km
2008 UC202
Apr 27
8.9 LD
--
10 m
2009 UK20
May 2
8.6 LD
--
23 m
2008 FU6
May 5
75.5 LD
--
1.2 km
2003 YT1
May 5
65.3 LD
--
2.5 km
2002 JC
Jun 1
57.5 LD
--
1.6 km
2009 BD
Jun 2
0.9 LD
--
9 m
2002 JB9
Jun 11
71.5 LD
--
3.2 km
2001 VH75
Jun 12
42.2 LD
--
1.1 km
2004 LO2
Jun 15
9.9 LD
--
48 m
2001 QP181
Jul 2
35.1 LD
--
1.1 km
2003 YS117
Jul 14
73.9 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
Conquest Graphics
  for out-of-this-world printing and graphics
Science Central
   
  more links...
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