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Solar wind
speed: 649.5 km/sec
density: 2.1 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: C2
2027 UT Feb02
24-hr: C2
2027 UT Feb02
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 02 Feb 15
Sunspots AR2268 and AR2277 have magnetic fields that harbor energy for M-class solar flares: Credit: SDO/HMI

Sunspot number: 132
What is the sunspot number?
Updated 02 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 02 Feb 2015

The Radio Sun
10.7 cm flux: 142 sfu
explanation | more data
Updated 02 Feb 2015

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 4 unsettled
24-hr max: Kp= 5
explanation | more data
Interplanetary Mag. Field
Btotal: 5.4 nT
Bz: 2.6 nT south
explanation | more data
Updated: Today at 2351 UT
Coronal Holes: 02 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 02 2200 UTC
0-24 hr
24-48 hr
40 %
30 %
05 %
05 %
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 02 2200 UTC
0-24 hr
24-48 hr
40 %
20 %
15 %
05 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
10 %
20 %
30 %
35 %
50 %
30 %
Monday, Feb. 2, 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

SNOW MOON AND JUPITER: There's a full Moon this week, and according to folklore it has a special name: the Snow Moon, so-called because northern snow often falls most heavily in February. This year the Snow Moon is in conjunction with Jupiter. Look for the duo rising together in the east just after sunset on Feb. 3rd.

GEOMAGNETIC STORM: A stream of high-speed solar wind is bufteting Earth's magnetic field, and this is sparking G1-class geomagnetic storms around the Arctic Circle. This morning in Alaska, the auroras were bright enough to see through almost-full moonlight:

'It was an amazing show," says photographer Marketa S Murray. "The auroras were south, north ... all over the sky!"

NOAA estimates a 70% chance of continued geomagnetic storming on Feb. 2nd. High-latitude sky watchers should remain alert for auroras tonight as the solar wind continues to blow. Aurora alerts: text, voice

Realtime Aurora Photo Gallery

CLOUDTOP GREEN FLASH: reader Mila Zinkova of San Francisco was photographing the sunset on Jan. 29th when a puff of sun detached itself and turned green. It was a rare cloud-top green flash:

Atmospheric optics expert Les Cowley explains what happened: "San Francisco and the Californian coast is a world top spot for green flashes. Air is cooled by the cold offshore current and topped by warmer air from inland to provide the ideal temperature profile for sunset mirages and flashes."

"Mila's flash might be something extra special - a 'cloud-top' flash.  These are seen as the sun's rays graze a distant cloud bank. Marine stratus can be trapped by temperature inversion layers which could generate some of the flashes. But that is not always the case; there is much unexplained about them.

Realtime Space Weather 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. 2, 2015, the network reported 10 fireballs.
(10 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 2, 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
65 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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