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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: 394.0 km/sec
density: 2.8 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: M1
1825 UT Aug07
24-hr: M1
1825 UT Aug07
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 07 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: 49
What is the sunspot number?
Updated 06 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 06 Aug 2010


The Radio Sun
10.7 cm flux: 82 sfu
explanation | more data
Updated 06 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= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 3.1 nT
Bz: 1.5 nT north
explanation | more data
Updated: Today at 2346 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole could reach Earth on August 8th or 9th. Credit: SDO/AIA
SPACE WEATHER
NOAA Forecasts
Updated at: 2010 Aug 07 2201 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
25 %
25 %
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 07 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
What's up in Space
August 7, 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.

 

M-FLARE: At 1825 UT on August 7th, Earth-orbiting satellites detected a long-duration M1-class solar flare. The source of the blast was sunspot 1093. Several amateur astronomers caught the active region in mid-flare. First-look data confirm that the blast produced a CME, but the cloud is not heading directly toward Earth. A glancing blow to our magnetic field on August 9th or 10th might produce auroras, but this does not appear to herald a major space weather event at Earth. Stay tuned for updates.

PERSEID METEOR UPDATE: "The Perseids are booming here in Alabama," reports astronomer Bill Cooke of the Marshall Space Flight Center. "Although the peak of the shower is almost a week away, we saw five Perseid fireballs last night (Aug. 5-6). It's a good sign that this year's shower will be a good one." [live meteor radar] [2009 Perseid gallery] [meteor counts]

FAREWELL SOLAR MINIMUM: Solar activity is picking up and that gives some astronomers reason to wake up in the morning. "Ah the dawn of a new day... and what a day it was!" says Wouter Verhesen of the Netherlands, who took this picture of the morning sun on August 6th:

"There were massive prominences sticking out of the sun everywhere, sunspots galore, and even a small flare in AR1093," says Verhesen. "I can't remember the last time I had so much to do with my small solarscope. Farewell solar minimum, you will not be missed!"

Indeed it will not. Browse the links for more reasons why: from the Solar Dynamics Observatory in Earth orbit; from Alan Friedman of Buffalo, NY; from Michael Buxton of Ocean Beach, California; from Thierry Legault of Elancourt, France; from Cai-Uso Wohler of Bispingen, Germany; from Paul Andrew of Dover, Kent, UK; from Fabio Mariuzza of Biauzzo - Italy

SUNSET PLANETS: When the sun goes down tonight, step outside and look west. You might see something like this:

Babak Tafreshi sends the picture from the Alborz Mountains of Iran. "Venus, Saturn and Mars are in triple conjunction," says Tafreshi, "and they will be at their most beautiful in the nights ahead."

Next week, on August 12th, the trio will become a quartet when the crescent Moon joins the planets for an amazing four-way conjunction. Even more amazing, it happens on the peak-night of the Perseid meteor shower. Astronomy doesn't get much better than this!

sky maps: August 7, 8, 9, 10, 11, 12, 13

more images: from Richard Glenn of Gold Beach, Oregon; from Tom Wagner of Waterloo, Iowa; from Giuseppe Pappa of Mascalucia, Sicily, Italy;


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 7, 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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