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Solar wind
speed: 369.4 km/sec
density: 6.3 protons/cm3
explanation | more data
Updated: Today at 2351 UT
X-ray Solar Flares
6-hr max: C1
2015 UT Feb20
24-hr: C2
1522 UT Feb20
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 20 Feb 15
None of these sunspots poses a threat for strong flares. Solar activity is low. Credit: SDO/HMI

Sunspot number: 86
What is the sunspot number?
Updated 20 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 20 Feb 2015


The Radio Sun
10.7 cm flux: 119 sfu
explanation | more data
Updated 20 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= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 7.1 nT
Bz: 2.3 nT south
explanation | more data
Updated: Today at 2351 UT
Coronal Holes: 20 Feb 15
A Solar wind flowing from these polar coronal holes should reach Earth on Feb. 21-22. 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: 02-20-2015 03:55:05
SPACE WEATHER
NOAA Forecasts
Updated at: 2015 Feb 20 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
01 %
01 %
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: 2015 Feb 20 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
30 %
MINOR
01 %
10 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
25 %
30 %
SEVERE
20 %
40 %
 
Friday, Feb. 20, 2015
What's up in space
 

Come to Tromsø and share Marianne's passion for rural photography: Chasethelighttours.co.uk invites you to experience "Heaven on Earth" with an aurora, fjord, fishing, whale watching, photography or sightseeing tour.

 
Chase the Light Tours

SUNSET SKY ALERT: When the sun goes down tonight, step outside and look west. Venus, Mars and the 6% crescent Moon have gathered in the twilight for a beautiful three-way conjunction. It's a nice way to end the day: photo gallery.

UNUSUAL COMET DIVE-BOMBS THE SUN: Astronomers are puzzling over a comet that passed "insanely close" to the sun on Feb. 19th. At first glance it appeared to be a small object, not much bigger than a comet-boulder, doomed to disintegrate in the fierce heat. Instead, it has emerged apparently intact and is actually brightening as it recedes from the sun. Click to view a post-flyby movie recorded on Feb. 20th by the Solar and Heliospheric Observatory (SOHO):

Unofficially, the icy visitor is being called "SOHO-2875," because it is SOHO's 2,875th comet discovery.

Karl Battams of the Naval Research Lab explains what's odd about SOHO-2875: "It's a 'non-group comet,' meaning that it does not appear to be related to any other comet or comet family that we have on record."

Most comets that SOHO sees belong to the Kreutz family. Kreutz sungrazers are fragments from the breakup of a single giant comet many centuries ago. They get their name from 19th century German astronomer Heinrich Kreutz, who studied them in detail. SOHO-2875, however, is not one of those fragments.

"Non-group comets like this appear a few times a year, so in that sense it's not too unusual," continues Battams. "But this one is relatively bright. The big question most people will have now is, Can I see it, or will I be able to see it, from Earth? At first I thought the answer was no. But I am very pleasantly surprised--shocked in fact! The comet has brightened dramatically and now is sporting an increasingly impressive tail. Visibility from Earth in a few weeks is no longer out of the question, although I still wouldn't put money on it."

"I'll continue to tweet updates on my twitter.com/SungrazerComets feed, so folks can follow along there too."

Realtime Comet Photo Gallery

(ALMOST NO) CHANCE OF FLARES: Solar activity is very low, and it is likely to remain so for the next 24 hours. All of the sunspots on the solar disk are small and quiet. NOAA forecasters estimate a 1% chance of M- or X-class solar flares on Feb. 20th. Solar flare alerts: text, voice

The face of the sun is mostly blank. For a closer look, click on this image taken by NASA's Solar Dynamics Observatory on Feb. 20th:

There are six sunspot groups, all fading. If their decay continues, a spotless day could be in the offing--the first since July 2014. Stay tuned for quiet

Realtime Space Weather Photo Gallery


Realtime Aurora 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 Spaceweather.com.

On Feb. 20, 2015, the network reported 5 fireballs.
(5 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 20, 2015 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2015 DD1
Feb 17
0.1 LD
4 m
2015 CQ13
Feb 18
6.7 LD
31 m
2015 DB
Feb 18
1.3 LD
12 m
2015 DU
Feb 23
8 LD
21 m
2015 CA40
Feb 23
6.3 LD
50 m
2000 EE14
Feb 27
72.5 LD
1.6 km
2063 Bacchus
Apr 7
76 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.
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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