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Solar wind
speed: 433.7 km/sec
density: 0.5 protons/cm3
explanation | more data
Updated: Today at 2346 UT
X-ray Solar Flares
6-hr max: C8
1844 UT Feb05
24-hr: M1
1620 UT Feb05
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 05 Feb 14
Earth-facing sunspot AR1967 has a 'beta-gamma-delta' magnetic field that harbors energy for X-class solar flares. Credit: SDO/HMI
Sunspot number: 183
What is the sunspot number?
Updated 05 Feb 2014

Spotless Days
Current Stretch: 0 days
2014 total: 0 days (0%)
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%)

05 Feb 2014

The Radio Sun
10.7 cm flux: 188 sfu
explanation | more data
Updated 05 Feb 2014

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
explanation | more data
Interplanetary Mag. Field
Btotal: 8.2 nT
Bz: 3.4 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 05 Feb 14
A solar wind stream flowing from the indicated coronal hole should reach Earth on or about Feb. 9th. Credit: SDO/AIA. posts daily satellite images of noctilucent clouds (NLCs), which hover over Earth's poles at the edge of space. The data come from NASA's AIM spacecraft. The north polar "daisy" pictured below is a composite of near-realtime images from AIM assembled by researchers at the University of Colorado's Laboratory for Atmospheric and Space Physics (LASP).
Noctilucent Clouds
Switch view: Europe, USA, Asia, Polar
Updated at: 02-04-2014 11:55:02
NOAA Forecasts
Updated at: 2014 Feb 05 2200 UTC
0-24 hr
24-48 hr
80 %
80 %
25 %
25 %
Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at: 2014 Feb 05 2200 UTC
0-24 hr
24-48 hr
05 %
05 %
01 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
15 %
15 %
05 %
05 %
Wednesday, Feb. 5, 2014
What's up in space

When is the best time to see auroras? Where is the best place to go? And how do you photograph them? These questions and more are answered in a new book, Northern Lights - a Guide, by Pal Brekke & Fredrik Broms.

Northern Lights - a Guide

WEAK IMPACT: A weak disturbance in the solar wind swept past Earth on Feb 5th at ~1400 UT. It may have been the long-overdue CME of Jan 31st, finally arriving after five days in transit. The weak impact did not spark a geomagnetic storm. Aurora alerts: text, voice

AS THE SUN TURNS: Carried along by the sun's 27-day rotation, big sunspot AR1967 is turning away from Earth. Ironically this is making the active region even more dangerous. AR1967 is moving toward a location where the sun's spiraling magnetic field is well-connected to our planet and energetic particles can be funneled in our direction. An explosion there could spark a radiation storm around Earth. Click to watch the sun turn:

AR1967 has a 'beta-gamma-delta' magnetic field that harbors energy for strong eruptions. The past 24 hours has been relatively quiet, but that could be the calm before the storm. NOAA forecasters estimate an 80% chance of M-class solar flares and a 50% chance of X-class solar flares on Feb. 5th.. Solar flare alerts: text, voice

Realtime Space Weather Photo Gallery

MUST-SEE AURORA MOVIE: "We are enjoying one of our best years ever," reports Chad Blakley, an aurora tour guide in Sweden's Abisko National Park. "So far we have seen auroras on 29 out of the 31 nights we have looked. Last night was extra special. The sky exploded in color and I was lucky to capture the phenomenon with several different cameras from multiple angles." Click to view the resulting footage:

"The lights were so powerful that the images became overexposed with a shutter speed of less than one second," he continues. "I can honestly say that this was one of the greatest displays of natural beauty that I have ever seen."

The show is apt to continue tonight. NOAA forecasters estimate a 25% chance of geomagnetic storms on Feb. 3-4 when an approaching CME is expected to deliver a glancing blow to our planet's magnetic field. Aurora alerts: text, voice

Realtime Aurora Photo Gallery

Realtime Supernova Photo Gallery

  All Sky Fireball Network

Every night, a network of NASA all-sky cameras scans the skies above the United States for meteoritic fireballs. Automated software maintained by NASA's Meteoroid Environment Office calculates their orbits, velocity, penetration depth in Earth's atmosphere and many other characteristics. Daily results are presented here on

On Feb. 4, 2014, the network reported 6 fireballs.
(6 sporadics)

In this diagram of the inner solar system, all of the fireball orbits intersect at a single point--Earth. The orbits are color-coded by velocity, from slow (red) to fast (blue). [Larger image] [movies]

On Feb. 3, 2014, the network reported 0 fireballs.

  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 5, 2014 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2014 CE
Feb 1
1.4 LD
17 m
2014 BX43
Feb 2
9 LD
30 m
2014 BM62
Feb 2
3.2 LD
38 m
2014 BW32
Feb 3
1.9 LD
23 m
2014 BP43
Feb 8
5.5 LD
22 m
2006 DP14
Feb 10
6.2 LD
730 m
2014 BT43
Feb 11
9.8 LD
32 m
2000 EM26
Feb 18
8.8 LD
195 m
2014 BR57
Feb 20
4.4 LD
70 m
2000 EE14
Mar 6
64.6 LD
1.8 km
2003 QQ47
Mar 26
49.9 LD
1.4 km
1995 SA
Apr 2
73.1 LD
1.6 km
2000 HD24
Apr 4
42.2 LD
1.3 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
Space Weather Alerts
  more links...
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