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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
SPACE WEATHER
Current conditions
Solar wind
speed: 348.2 km/sec
density: 0.1 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: A7
2000 UT Aug30
24-hr: B1
1220 UT Aug30
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 30 Aug 10
Sunspot 1101 is remarkably stable and quiet. It is too soon to say what kind of solar activity new sunspot 1102 might bring. So far it seems quiet, too.
Resolutions: 4096, 1024, 512
Sunspot number: 25
What is the sunspot number?
Updated 29 Aug 2010

Spotless Days
Current Stretch: 0 days
2010 total: 39 days (16%)
2009 total: 260 days (71%)
Since 2004: 807 days
Typical Solar Min: 486 days
explanation | more info
Updated 29 Aug 2010


The Radio Sun
10.7 cm flux: 74 sfu
explanation | more data
Updated 29 Aug2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 1
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 2.8 nT
Bz: 0.1 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes:
Earth is exiting a solar wind stream flowing from the indicated coronal hole. Credit: SDO/AIA
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Aug 30 2201 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: 2010 Aug 30 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
10 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
15 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
What's up in Space
August 30, 2010

AURORA ALERTS: Did you miss the Northern Lights? Next time get a wake-up call from Space Weather PHONE

 

MUST-SEE ASTEROID VIDEO: Astronomer and programmer Scott Manley, formerly of the Armagh Observatory in Northern Ireland, has created a movie showing 30 years of asteroid discoveries in only 3 minutes. Warning: Feelings of claustrophobia have been reported among some viewers. It's crowded out there! Click to play.

AURORA AUSTRALIS: Earth is exiting a solar wind stream that has been causing bright auroras around the poles--both poles. Michael Zupanc sends this picture from Australia's Davis Station on the coast of Antarctica:

"The tail end of the solar wind stream produced a nice outburst on Aug. 27th," says Zupanc. "Despite having to contend with a nearly full Moon, the auroras were easy to see."

The green laser lancing into the sky is the station's lidar, the optical equivalent of a radar. "We use it to study stratospheric clouds," says Zupanc. The polar atmosphere is a sensitive 'barometer' of climate change and ozone recovery, and the Davis Station lidar is a key tool for researchers. It is able to measure the density, temperature, wind velocity and aerosol loading of critical atmospheric layers above the frozen continent. Plus it looks great during a geomagnetic storm!

Browse the gallery for latest images from the recent display:

UPDATED: August 2010 Northern Lights Gallery
[previous Augusts: 2009, 2008, 2007, 2006, 2005, 2004, 2003]

FOGBOW SEASON BEGINS: Northern autumn is just around the corner, which means the time for fogbows has arrived. Moisture rising from the sun-heated ground condenses in the cool night air, producing low-hanging fogs. When light from the morning sun or Moon hits the mist--voilĂ --a fogbow:

 

This is a lunar fogbow, photographed by Mike Hollingshead of Blair, Nebraska, just before dawn on August 25th. "I'm finding it rather fun to go lunar fogbow hunting," says Hollingshead. "It takes a pretty calm and cool night to get the fog, and the lunar phase needs to be around full so the Moon is big and low before sunrise. When everything comes together--wow! It's pretty cool to see vivid lunar fogbows arcing over fields in the darkness of night."

"Also seen on August 25th were steamdevils and deer swimming all the way across a lake!" he adds. "It pays to wake up early on cool fall mornings."

more images: from Tom Soetaert of Lawrence, Kansas

 
       
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 August 30, 2010 there were 1144 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2002 CY46
Sep 2
63.8 LD
16
2.4 km
2010 LY63
Sep 7
56 LD
18
1.2 km
2009 SH2
Sep 30
7.1 LD
25
45 m
1998 UO1
Oct 1
32.1 LD
17
2.1 km
2005 GE59
Oct 1
77 LD
18
1.1 km
2001 WN5
Oct 10
41.8 LD
18
1.0 km
1999 VO6
Oct 14
34.3 LD
17
1.8 km
1998 TU3
Oct 17
69.1 LD
15
5.3 km
1998 MQ
Oct 23
77.7 LD
17
1.9 km
2007 RU17
Oct 29
40.6 LD
18
1.0 km
2003 UV11
Oct 30
5 LD
19
595 m
3838 Epona
Nov 7
76.8 LD
16
3.4 km
2005 QY151
Nov 16
77.7 LD
18
1.3 km
2008 KT
Nov 23
5.6 LD
28
10 m
2002 EZ16
Nov 30
73.9 LD
18
1.0 km
2000 JH5
Dec 7
47 LD
17
1.5 km
2010 JL33
Dec 9
16.6 LD
18
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 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
Current Solar Images
  from the National Solar Data Analysis Center
Science Central
   
  more links...
   
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