You are viewing the page for Jan. 14, 2011
  Select another date:
<<back forward>> -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
Solar wind
speed: 477.5 km/sec
density: 1.8 protons/cm3
explanation | more data
Updated: Today at 2343 UT
X-ray Solar Flares
6-hr max: B2
1709 UT Jan14
24-hr: C1
0331 UT Jan14
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 14 Jan 11
Sunspot 1146 is rapidly fading away. Credit: SDO/HMI
Sunspot number: 14
What is the sunspot number?
Updated 13 Jan 2011

Spotless Days
Current Stretch: 0 days
2011 total: 0 days (0%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
Since 2004: 819 days
Typical Solar Min: 486 days

Updated 13 Jan 2011

The Radio Sun
10.7 cm flux: 80 sfu
explanation | more data
Updated 13 Jan 2011

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 3
explanation | more data
Interplanetary Mag. Field
Btotal: 3.8 nT
Bz: 1.1 nT north
explanation | more data
Updated: Today at 2345 UT
Coronal Holes: 14 Jan 10
Earth is entering a solar wind stream flowing from the indicated coronal hole. Credit: SDO/AIA.
NOAA Forecasts
Updated at: 2011 Jan 14 2200 UTC
0-24 hr
24-48 hr
01 %
01 %
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 Jan 14 2200 UTC
0-24 hr
24-48 hr
20 %
10 %
10 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
30 %
15 %
15 %
01 %
01 %
01 %
Friday, Jan. 14, 2011
What's up in space

Turn your cell phone into a field-tested satellite tracker. Works for Android and iPhone.

Satellite flybys

SUNDIVING COMET STORM: 2010 ended with an unprecedented flurry of small comets diving into the Sun. Researchers say this could herald a much larger comet still to come. Get the full story from Science@NASA.

MISSISSIPI FIREBALL: On Jan. 11th around 8:45 pm CST, many people in the southeastern USA saw something streak across the sky and explode. The blast produced infrasound waves detected as far away as Canada. Data from a University of Western Ontario monitoring station reveals the nature of the event: "It was a meter-size meteor with more than a metric ton of mass, exploding like 40 to 80 tons of TNT," says Bill Cooke of NASA's Meteoroid Environment Office. "This was one big rock, and the odds are good that there are fragments on the ground." An analysis of sightings by meteorite hunter Rob Matson suggests the fall zone is in central Mississippi, possibly around Jackson. People in the area should be alert for odd-looking rocks.

FARSIDE ACTIVITY CONTINUES: For the second day in a row, an active region on the far side of the sun is exploding and hurling CMEs into space. Click on the image to view a movie of the latest:

Today's eruption was almost as dramatic as yesterday's, and suggests that more eruptions are in the offing.

These explosions are occuring almost directly beneath NASA's STEREO-B spacecraft. An onboard telescope has recorded bright flashes of extreme UV radiation and shadowy shock waves emanating from the blast site (Jan. 13th movie). The telescope has also pinpointed the source: It is located just over the sun's eastern limb. Solar rotation is turning the region toward Earth, so geoeffective solar activity could commence within days. Stay tuned.

NORTHERN LIGHTS: Last night in Tromsø, Norway, the solar wind combined with moonlight and snow to produce a scene that had onlookers asking themselves, can it get any better than this? One of those onlookers was Thilo Bubek, and he took this picture:

"The whole evening was a perfect show with strong auroras in many colours," says Bubek. "We were able to capture some fantastic images."

But can it get any better? Maybe later today: A solar wind stream is due to hit Earth's magnetic field on Jan. 14-15, possibly sparking even stronger displays. NOAA forecasters estimate a 30% chance of high-latitude geomagnetic activity when the solar wind stream arrives.

January 2011 Aurora Photo Gallery
[previous Januaries: 2010, 2009, 2008, 2007, 2005, 2004]

Solar Eclipse Photo Gallery
[NASA: Hinode Observes Annular Solar Eclipse]

  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 14, 2011 there were 1179 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2011 AZ22
Jan 9
1.3 LD
8 m
2011 AN4
Jan 9
5.1 LD
23 m
2011 AN1
Jan 10
5.5 LD
12 m
2009 BS5
Jan 11
3.4 LD
14 m
2011 AH5
Jan 13
3.3 LD
28 m
2011 AY22
Jan 14
4.1 LD
17 m
2011 AB37
Jan 19
9.5 LD
29 m
2003 YG118
Feb 20
67.7 LD
1.8 km
2000 PN9
Mar 10
45.5 LD
2.6 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
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.
  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
  the underlying science of space weather
Science Central
  more links...
©2010 All rights reserved. This site is penned daily by Dr. Tony Phillips.
Spaceweather Text

©2019 All rights reserved.