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Solar wind
speed: 293.5 km/sec
density: 5.0 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: B6
1941 UT Mar13
24-hr: C1
0018 UT Mar13
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 13 Mar 13
Sunspot complex AR1690-1691 is crackling with long-duration C-class solar flares. Credit: SDO/HMI
Sunspot number: 95
What is the sunspot number?
Updated 13 Mar 2013

Spotless Days
Current Stretch: 0 days
2013 total: 0 days (0%)
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
13 Mar 2013

The Radio Sun
10.7 cm flux: 123 sfu
explanation | more data
Updated 13 Mar 2013

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 1
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 2.6 nT
Bz: 0.6 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 13 Mar 13
There are no large equatorial coronal holes on the Earthside of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2013 Mar 13 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
10 %
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: 2013 Mar 13 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
45 %
MINOR
05 %
25 %
SEVERE
01 %
05 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
10 %
MINOR
25 %
25 %
SEVERE
25 %
65 %
 
Wednesday, Mar. 13, 2013
What's up in space
 

Hang the Transit of Venus on your wall! Hubble-quality images from NASA's Solar Dynamics Observatory are now available as metallic posters in the Space Weather Store.

 
Venus Transit metal posters

CHANCE OF STORMS: NOAA forecasters estimate a 65% chance of polar geomagnetic storms on March 15th when a CME might deliver a glancing blow to Earth's magnetic field. The CME was launched by a filament of solar magnetism that erupted on March 12th. High-latitude sky watchers should be alert for auroras when the cloud arrives. Aurora alerts: text, voice.

THE COMET SHOW BEGINS: Last night, March 12th, a rare meeting occured in the sunset sky. Comet Pan-STARRS (C/2011 L4) was only a few degrees away from the exquisitely-slender crescent Moon. Brian Klimowski sends this picture from the countryside near Flagstaff, Arizona:


Photo details: Canon 7D, 125 mm, 1s @ F/5.6. ISO 1250.

"Beautiful show this evening!" says Klimowski. "I took the photo from an altitude of about 9500 feet in the San Francisco Peaks near Flagstaff. A 1-second exposure with my Canon digital camera easily revealed the comet."

Because of the sunset glow, Comet Pan-STARRS remains at the lower limit of naked-eye visibility. A small number of observers have reported seeing the comet with averted vision but, for the most part, binoculars are required. The situation will improve in the nights ahead as Comet Pan-STARRS moves away from the sun into darker skies. Later this week it might be possible to walk outside after nightfall, look west, and see the comet with the unaided eye. If you would like to try tonight, look for Comet Pan-STARRS directly underneath the waxing crescent Moon: sky map.

The show is just getting started. Stay tuned! More: NASA video, 3D orbit, ephemeris, light curves.

Realtime Comet Photo Gallery

MAGNETIC ERUPTION ON MARCH 12th: A magnetic filament in the sun's northern hemisphere slowly erupted on March 12th for more than two hours around 1107 UT. Extreme ultraviolet telescopes onboard NASA's Solar Dynamics Observatory recorded the action:

The source of the explosion was active region AR1690 on the sun's central meridian. Although AR1690 is almost directly facing our planet, debris from the blast will mostly miss Earth. A CME produced by the explosion is traveling north of the sun-Earth line. Nevertheless, the southern fringe of the CME might hit Earth's magnetic field on March 15th. NOAA forecasters estimate a 65% chance of polar geomagnetic storms when the cloud arrives. Aurora alerts: text, voice.

Realtime Space Weather Photo Gallery


Realtime Aurora 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 March 13, 2013 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2013 EC20
Mar 9
0.4 LD
7 m
2013 ET
Mar 9
2.5 LD
102 m
2013 EN20
Mar 10
1.2 LD
7 m
2013 ES41
Mar 13
6.5 LD
21 m
2013 EA29
Mar 14
3.5 LD
22 m
2007 EO88
Mar 18
4.4 LD
23 m
1993 UC
Mar 20
49 LD
3.8 km
2013 ES11
Mar 22
6.3 LD
86 m
1997 AP10
Mar 28
45.9 LD
1.8 km
2010 GM23
Apr 13
3.9 LD
50 m
2005 NZ6
Apr 29
24.9 LD
1.3 km
2001 DQ8
Apr 30
74.3 LD
1.1 km
2004 BV102
May 25
69.9 LD
1.4 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
Space Weather Alerts
   
  more links...
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