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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: 518.7 km/sec
density: 1.0 protons/cm3
explanation | more data
Updated: Today at 2346 UT
X-ray Solar Flares
6-hr max: C1
2135 UT Aug05
24-hr: C1
2135 UT Aug05
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 05 Aug 10
Sunspots 1092 and 1093 pose a threat for C-class solar flares. Two small, un-numbered sunspots may be found at the circled locations. Credit: SDO/HMI
Resolutions: 4096, 1024, 512
Sunspot number: 27
What is the sunspot number?
Updated 04 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 04 Aug 2010


The Radio Sun
10.7 cm flux: 81 sfu
explanation | more data
Updated 04 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= 4
unsettled
explanation | more data
Interplanetary Mag. Field
Btotal: 2.6 nT
Bz: 0.7 nT north
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 05 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 05 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
20 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
25 %
25 %
MINOR
10 %
10 %
SEVERE
01 %
01 %
What's up in Space
August 5, 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.

 

AURORA AUSTRALIS: Not all the lights in the sky this week were Northern. The geomagnetic storm of August 3rd and 4th also triggered a ring of Southern Lights (aurora australis) around Antarctica. Australian researcher Tom Luttrell sends these snapshots from Casey Base on the Antarctic coast.

MORE AURORAS IN THE OFFING? Earth's magnetic field is still reverberating from the CME impact of August 3rd, which sparked auroras as far south as Wisconsin and Iowa in the United States. Analysts believe a second CME is not far behind it, due to arrive on August 5th. A second impact could re-energize the fading geomagnetic storm and spark a new round of Northern Lights. High-latitude sky watchers should remain alert for auroras.

At the height of the August 3rd display "the whole sky over northern Quebec filled with green and purple," says photographer Michel Tournay. "I couldn't decide where to point my camera!" Fortunately, he had a wide-angle lens:

Meanwhile in Ringsaker, Norway, the auroras were so bright "we could see them through clouds, moonlight and midnight sunlight," says Ragnar Johnskås. "It was a lovely show."

Browse the gallery for more!

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

EARLY PERSEID FIREBALL: This week, Earth is entering a stream of dusty debris from Comet Swift-Tuttle, the parent of the annual Perseid meteor shower. We're only in the outskirts of the stream now. The shower won't peak until August 12th and 13th when we're much deeper inside. Nevertheless, sky watchers are already seeing some early Perseids. This one, recorded by a NASA meteor camera in Alabama on August 3rd, was a doozy:


Click to view a 1 MB Quicktime movie

"On Monday night, a Perseid meteoroid, about 1 inch in diameter and traveling at 134,000 mph, entered the atmosphere 70 miles above Paint Rock, Alabama," reports Bill Cooke of NASA's Marshall Space Flight Center. "Moving at such a tremendous speed, the meteor cut a path some 65 miles long above that state, finally burning up 56 miles above Macay Lake. It was 6 times brighter than the planet Venus--a good start to the Perseid meteor shower!"

Stay tuned for more Perseids as Earth moves deeper into the debris stream.


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 5, 2010 there were 1140 potentially hazardous asteroids.
Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2010 KZ117
Aug 4
72.6 LD
18
1.0 km
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
56.1 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
2.0 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
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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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