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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: 408.7 km/sec
density: 0.9 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: C1
1805 UT Aug14
24-hr: C4
1005 UT Aug14
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 14 Aug 10
Sunspot complex 1093-1099 poses a threat for C-class solar flarres. Credit: SDO/HMI
Resolutions: 4096, 1024, 512
Sunspot number: 51
What is the sunspot number?
Updated 12 Aug 2010

Spotless Days
Current Stretch: 0 days
2010 total: 35 days (15%)
2009 total: 260 days (71%)
Since 2004: 803 days
Typical Solar Min: 486 days
explanation | more info
Updated 12 Aug 2010


The Radio Sun
10.7 cm flux: 84 sfu
explanation | more data
Updated 12 Aug2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 1
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 5.5 nT
Bz: 2.2 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes:
A narrow ssolar wind stream flowing from this sinuous coronal hole could reach Earth on August 15th. Credit: SDO/AIA
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Aug 14 2201 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
05 %
05 %
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 14 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
20 %
MINOR
01 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
30 %
MINOR
05 %
10 %
SEVERE
01 %
01 %
What's up in Space
August 14, 2010

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

 

SUNSPOT TYTONIDAE: Sunspot 1093 continues to amaze onlookers. Earlier this week, it divided like a giant amoeba undergoing mitosis. And "today it looks like an owl (family Tytonidae)," reports Rogerio Marcon of Campinas, Brasil. "What a beautiful configuration!" What's next? Readers with solar telescopes are encouraged to monitor developments.

SUNSPOTS ERUPT IN TANDEM: Today at 1005 UT, magnetic fields connecting sunspot 1093 and 1099 erupted, producing a two-sunspot solar flare (C4-class) and hurling a huge blob of plasma into space. Click on the image to launch a Solar Dynamics Observatory (SDO) movie of the event:


movie formats: 2.4 MB mpeg; 0.9 MB iPhone; 0.7 MB iPad

The explosion lasted for more than two hours, giving many amateur astronomers time to catch the eruption in action. Other than photo-ops, however, this explosion will probably not affect Earth much. The cloud ejected by the blast is not heading our way.

more images: from Cai-Uso Wohler of Bispingen, Germany; from Z. Roy and J.Stetson of South Portland, Maine; from Jan Timmermans of Valkenswaard, The Netherlands

SUBSIDING PERSEIDS: Earth is exiting the debris stream of Comet Swift-Tuttle, source of the Perseid meteor shower. According to the International Meteor Organization, dark-sky observers are now counting fewer than 20 to 30 Perseids per hour, a sharp drop from the peak of 100 per hour on August 13th. The show is essentially over, except for some lingering debris:

"At about 1:05 a.m. PDT on August 13th, a bright Perseid raced over Borrego Springs, California, illuminating our desert surroundings," reports photographer Dennis Mammana. "We could see the fireball's debris for several minutes as it twisted in the upper atmospheric winds--very pretty!"

Browse the gallery for more reports and images.

Key Perseid Resources:


Solar Eclipse Photo Gallery
[NASA: South Pacific Eclipse] [animated map]


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

 

 
       
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 14, 2010 there were 1142 potentially hazardous asteroids.
Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2005 NZ6
Aug 14
60.5 LD
18
1.3 km
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
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 and Heliospheric Observatory
  Realtime and archival images of the Sun from SOHO.
STEREO
  3D views of the sun from NASA's Solar and Terrestrial Relations Observatory
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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