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Solar wind
speed: 427.5 km/sec
density: 0.0 protons/cm3
explanation | more data
Updated: Today at 2351 UT
X-ray Solar Flares
6-hr max: C3
1912 UT Feb04
24-hr: M1
0216 UT Feb04
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 04 Feb 15
Sunspot AR2277 has a 'beta-gamma' magnetic field that harbors energy for M-class solar flares: Credit: SDO/HMI

Sunspot number: 112
What is the sunspot number?
Updated 04 Feb 2015

Spotless Days
Current Stretch: 0 days
2015 total: 0 days (0%)

2014 total: 1 day (<1%)
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%)

Update 04 Feb 2015

The Radio Sun
10.7 cm flux: 149 sfu
explanation | more data
Updated 04 Feb 2015

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 3
explanation | more data
Interplanetary Mag. Field
Btotal: 3.5 nT
Bz: 2.9 nT south
explanation | more data
Updated: Today at 2351 UT
Coronal Holes: 04 Feb 15
A Earth is inside a stream of solar wind flowing from this large southern coronal hole. Credit: SDO/AIA.
Noctilucent Clouds As of Nov. 22, 2014, the season for southern hemisphere noctilucent clouds is underway. The south polar "daisy" pictured below is a composite of near-realtime images from NASA's AIM spacecraft.
Switch view: Ross Ice Shelf, Antarctic Penninsula, East Antarctica, Polar
Updated at: 02-02-2015 16:55:02
NOAA Forecasts
Updated at: 2015 Feb 04 2200 UTC
0-24 hr
24-48 hr
20 %
20 %
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: 2015 Feb 04 2200 UTC
0-24 hr
24-48 hr
15 %
15 %
05 %
05 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
20 %
20 %
30 %
30 %
25 %
25 %
Wednesday, Feb. 4, 2015
What's up in space

Learn to photograph Northern Lights like a pro. Sign up for Peter Rosen's Aurora Photo Courses in Abisko National Park.

Lapland tours

CHANCE OF MAGNETIC STORMS: For the third day in a row, a high-speed stream of solar wind is buffeting Earth's magnetic field. Observers around the Arctic Circle have been seeing bright auroras, and the display could continue tonight. NOAA forecasters estimate a 35% chance of polar geomagnetic storms on Feb. 4th. Aurora alerts: text, voice

TRUE COLORS OF THE MOON: What color is the Moon? If you had to pick a single hue, it would probably be gray. There are light-gray lunar highlands, dark-gray lunar seas, and miles and miles of gray moondust everywhere. Yet the Moon is not monochromatic. Astronomers have long known that the Moon's terrain is actually rich in subtle color. Consider this image of the "Snow Moon" taken last night by Maximilian Teodorescu of Comana Woods, Romania:

Teodorescu boosted the natural colors of the Moon using Photoshop. "This is how the Moon would look like if we could have an saturation-enhancement filter integrated in our eyes," he says.

The colors reveal the Moon's mineral composition. Blue denotes areas rich in titanium, while orange is titanium poor. Pink traces iron-poor, aluminum-rich feldspars found in the lunar highlands. A challenge to astrophotographers: Capture the colors of tonight's Moon. It's not as gray as you think.

Realtime Space Weather Photo Gallery

SPACE ROSES FOR VALENTINE'S DAY: Valentine's Day is just around the corner, and many people are preparing to give the gift of roses. But wait. How about space roses, instead? On Jan. 28th, and the students of Earth to Sky Calculus flew a batch of rose seeds to the stratosphere. They went aloft inside a standard Space Weather Buoy, nestled alongside cameras, radiation sensors and GPS trackers. Here is a picture of the seeds 107,300 above Earth's surface:

En route to the edge of space, the seeds experienced cosmic radiation levels, temperatures, and pressures akin to those on the planet Mars. What kind of roses will these "space seeds" produce? We only know this: A seed packet of space roses would make a unique Valentine's gift.

Get yours now. For only $49.95 we will mail you a packet of seeds along with a Valentine's card authenticating their flight. 100% of funds received will be used for student research. For more information, contact Dr. Tony Phillips.

Realtime Space Weather Photo Gallery

SOLAR FILAMENT: Most solar flares come from sunspots. The next big explosion, however, could come from a different source: A huge filament of magnetism is rotating over the sun's southeastern limb, shown here in a Feb. 4th image from NASA's Solar Dynamics Observatory:

This structure is, essentially, a tendril of plasma more than 350,000 km long held suspended above the surface of the sun by magnetic forces. If it becomes unstable and erupts, it could hurl parts of itself into space. Pieces of the filament falling back to the solar surface would explode upon impact, creating one or more Hyder flares.

Astronomers with backyard solar telescopes are encouraged to monitor the structure as it turns toward Earth. A photogenic explosion may be in the offing. Solar flare alerts: text, voice

Realtime Aurora Photo Gallery

Realtime Comet 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, 2015, the network reported 15 fireballs.
(15 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]

  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 4, 2015 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2015 BE92
Jan 29
3.2 LD
10 m
2015 BD511
Jan 30
4.5 LD
19 m
2008 CQ
Jan 31
4.8 LD
36 m
2015 BF92
Feb 7
8.5 LD
63 m
2015 AZ43
Feb 15
7.7 LD
87 m
2000 EE14
Feb 27
72.5 LD
1.6 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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