You are viewing the page for Jan. 18, 2013
  Select another date:
<<back forward>>
SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 438.9 km/sec
density: 8.7 protons/cm3
explanation | more data
Updated: Today at 2346 UT
X-ray Solar Flares
6-hr max: C5
1707 UT Jan18
24-hr: C5
1707 UT Jan18
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 18 Jan 13
Decaying sunspot AR1654 has a beta-gamma magnetic field that harbors energy for M-class solar flares. Credit: SDO/HMI
Sunspot number: 74
What is the sunspot number?
Updated 18 Jan 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
18 Jan 2013

The Radio Sun
10.7 cm flux: 123 sfu
explanation | more data
Updated 18 Jan 2013

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: 5.8 nT
Bz: 5.5 nT north
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 18 Jan 13
There are no large coronal holes on the Earthside of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2013 Jan 18 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
10 %
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: 2013 Jan 18 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
25 %
35 %
MINOR
10 %
15 %
SEVERE
01 %
05 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
10 %
MINOR
30 %
30 %
SEVERE
35 %
55 %
 
Friday, Jan. 18, 2013
What's up in space
 

Thirty-five new items have just been added to our Meteorite Jewelry collection. Browse the Space Weather Store for something out of this world.

 
Meteorite jewelry

CHANCE OF STORMS: NOAA forecasters estimate a 30% chance of polar geomagnetic storms today. The reason is an incoming CME, which could deliver a minor blow to Earth's magnetic field during the next 24 hours. Arctic sky watchers should be alert for auroras. Aurora alerts: text, voice.

Even before the CME arrives, Arctic skies are glowing. Göran Strand sends this picture, taken on Jan. 17th, from Kall, Åre, Sweden:

"Two friends and I went out last night to capture the aurora that was forecast," says Strand. "It turned out to be a fantastic night with a half moon lighting up the landscape in a lovely way. In the distance you can the mountain Åreskutan, the biggest ski resort in Sweden."

Realtime Aurora Photo Gallery

COMET OF THE CENTURY? Later this year, Comet ISON could become bright enough to see in broad daylight when it passes through the atmosphere of the sun. At the moment, however, it is a cold and lonely speck barely visible through backyard telescopes. Two nights ago, Pete Lawrence of Selsey, UK, photographed the potentially-great comet moving through space near the orbit of Jupiter:

"I created this animation using images taken through a 4-inch refractor, starting at 23h on the 15th of January and ending at 01h on the 16th," says Lawrence. "The comet is clearly visible moving among the stars of Gemini, in an area just to the south of Castor."

Comet ISON looks so puny now because it is more than 600 million km away. In late 2013, however, it will be much closer. A key date is Nov. 28th when Comet ISON flies through the solar corona only 1.2 million km from the surface of the sun. If the comet survives the encounter--a big IF--it could emerge glowing as brightly as the Moon with a sensational tail sure to create a worldwide sensation. Stay tuned!

Realtime Comet Photo Gallery

RESTLESS SUNSPOT: The magnetic canopy of sunspot AR1654 is in a state of unrest, relentlessly shifting, reconnecting, and crackling with minor flares. This movie from NASA's Solar Dynamics Observatory shows six days (Jan. 9-15) of action:

The sunspot's magnetic field, illuminated above by the extreme UV glow of hot plasma and flares, has a 'beta-gamma-delta' configuration. That means it harbors energy for powerful X-class eruptions. So far, however, the sunspot has failed to produce a major eruption. Perhaps the tension is being relieved prematurely by restless fidgeting. NOAA forecasters estimate a 5% chance of X-flares during the next 24 hours. Solar flare alerts: text, voice.

Realtime Space Weather 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 January 18, 2013 there were 1367 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2013 AP72
Jan 16
1.9 LD
20 m
2013 AT72
Jan 20
9.9 LD
68 m
1999 HA2
Feb 5
58 LD
1.3 km
3752 Camillo
Feb 12
57.5 LD
3.4 km
1999 YK5
Feb 15
49.1 LD
2.1 km
2012 DA14
Feb 15
0.09 LD
58 m
2009 AV
Feb 25
59.7 LD
1.0 km
2007 EO88
Mar 18
4.4 LD
23 m
1993 UC
Mar 20
49 LD
3.8 km
1997 AP10
Mar 28
45.9 LD
1.8 km
2010 GM23
Apr 13
3.9 LD
50 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 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...
©2010 Spaceweather.com. All rights reserved. This site is penned daily by Dr. Tony Phillips.
©2013 Spaceweather.com. All rights reserved.