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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: 451.1 km/sec
density: 2.5 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: B1
2155 UT Aug10
24-hr: B7
1655 UT Aug10
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 10 Aug 10
A new sunspot is emerging at the circle location. Credit: SDO/HMI
Resolutions: 4096, 1024, 512
Sunspot number: 53
What is the sunspot number?
Updated 09 Aug 2010

Spotless Days
Current Stretch: 0 days
2010 total: 35 days (16%)
2009 total: 260 days (71%)
Since 2004: 803 days
Typical Solar Min: 486 days
explanation | more info
Updated 09 Aug 2010


The Radio Sun
10.7 cm flux: 84 sfu
explanation | more data
Updated 09 Aug2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 5.2 nT
Bz: 3.1 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes:
There are no large coronal holes on the Earth-facing side of the Sun. Credit: SDO/AIA
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Aug 10 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 10 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
10 %
MINOR
05 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
30 %
15 %
MINOR
10 %
01 %
SEVERE
01 %
01 %
What's up in Space
August 10, 2010

iPHONE VS ANDROID! Actually, it doesn't matter which phone you carry. Our cool, new app turns both smartphones into field-tested satellite trackers. Learn more.

 

PERSEID METEOR UPDATE: Earth is entering the debris stream of comet Swift-Tuttle and this is causing the annual Perseid meteor shower. According to the International Meteor Organization, observers are now counting as many as 25 meteors Perseids per hour during the dark hours before dawn. It's going to get even better: The shower is expected to peak on August 12th with rates as high as 100 per hour. Stay tuned for updates. [live meteor radar] [2010 meteor counts] [Bill Cooke's Perseid Twitter Feed]

INCOMING CME: The solar eruption of August 7th might affect Earth after all. Newly-arriving data from the Solar and Heliospheric Observatory (SOHO) show a CME heading our way with a significant Earth-directed component. Click on the image to launch a "difference movie" of the expanding cloud:

The impact of this lopsided CME probably won't trigger a major geomagnetic storm---but the SOHO data show it could be bigger than expected. High latitude sky watchers should be alert for auroras when the cloud arrives probably on August 10th.

ANTARCTIC AURORAS: The stage is set for a good display of auroras over Antarctica. The skies are already shimmering even before the CME arrives. J. Dana Hrubes sends this picture from the geographic South Pole:

Hrubes is wintering over at the Amundsen-Scott Station where he oversees operations of the South Pole Telescope (SPoT), silhouetted above by aurora australis. "After one of the windiest Julys on record, we finally got some very clear skies on August 9th," he says. "The auroras were a welcome surprise. The sun will be returning to the South Pole in a little over 6 weeks, so I'm hoping for more auroras soon."

He may get them. NOAA forecasters estimate a 30% chance of polar geomagnetic activity when the incoming CME arrives. Stay tuned for Southern Lights!

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


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

 
       
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 10, 2010 there were 1141 potentially hazardous asteroids.
Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2010 PJ9
Aug 9
2.8 LD
25
55 m
6239 Minos
Aug 10
38.3 LD
18
1.1 km
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
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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