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<<back forward>> -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
Current conditions
Solar wind
speed: 663.6 km/sec
density: 0.4 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: A7
2205 UT Aug25
24-hr: A7
2205 UT Aug25
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 25 Aug 10
Sunspot 1101 is big but quiet. Overall, solar activity is very low.
Resolutions: 4096, 1024, 512
Sunspot number: 11
What is the sunspot number?
Updated 24 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 24 Aug 2010

The Radio Sun
10.7 cm flux: 74 sfu
explanation | more data
Updated 24 Aug2010

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 5
explanation | more data
Interplanetary Mag. Field
Btotal: 3.3 nT
Bz: 2.4 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes:
Earth is entering a solar wind stream flowing from the indicated coronal hole. Credit: SDO/AIA
NOAA Forecasts
Updated at: 2010 Aug 25 2201 UTC
0-24 hr
24-48 hr
01 %
01 %
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 25 2201 UTC
0-24 hr
24-48 hr
50 %
40 %
20 %
10 %
05 %
01 %
High latitudes
0-24 hr
24-48 hr
50 %
50 %
25 %
15 %
10 %
01 %
What's up in Space
August 25, 2010

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


THE MUTATING MARS HOAX: Warning: The Mars Hoax is back and it's trickier than ever. Read today's story from Science@NASA to find out what's really going to happen in the night sky on August 27th.

NORTHERN LIGHTS: A high-speed solar wind stream is buffeting Earth's magnetic field and causing geomagnetic storms around the Arctic circle. Last night in Tromsø, Norway, the auroras were so bright, they could be seen in evening twilight:

At Tromsø's latitude (69°40′ N, 300 miles inside the Arctic circle), the midnight sun has overwhelmed Northern Lights since June, but visibility is improving as autumn nears. "I wasn't sure it would be dark enough yet, especially with the full Moon out as well," says photographer Hanneke Luijting. "I was jumping for joy when I saw that the aurora was strong enough to be visible! This was a great start to the season."

NOAA forecasters estimate a 30% chance of geomagnetic activity during the next 24 hours. High-latitude sky watchers should remain alert for auroras.

more images: from Dave Swartz of Toolik Lake, Alaska; from Andrew Colvin of Yellowknife, Northwest Territories, Canada; from Sævar Helgi Bragason of Bardastrond, Iceland; from Sylvain Serre of Salluit, Nunavik, Quebec, Canada; from Gilles Boutin of St-Michel de Bellechasse, Quebec; from Olivier Du Tré of Cochrane, Alberta

FULL MOON: How can you tell this Moon is full? Is it the enormous disk? The glaring moonlight? No. The real clue is the orange color of the office windows. Scroll down for the reason why:

"The orange light in the windows is reflection of the sunset," explains photographer M. Raşid Tuğral of Ankara, Turkey. "The sun and Moon were on opposite sides of the sky--the defining geometry of a full Moon!"

Last night's sun-Moon geometry attracted the attention of photographers around the world. Browse the links for more examples: from Stefano De Rosa of Isola d' Elba, Italy; from Tamás Ábrahám of Tök, Hungary; from Tamas Ladanyi of Veszprem, Hungary; from Mohammad Rahimi of Esfahan, Iran; from George Kristiansen of Upton, Lincolnshire, UK; from Fredrik Broms of Kvaløya, Norway; from Christophe Stolz of Riggisberg, Switzerland; from Alan Dyer of Dinosaur Provincial Park, Alberta, Canada

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

2010 Perseid Photo Gallery
[meteor radar] [Perseid fireball cam]

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 25, 2010 there were 1144 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2002 CY46
Sep 2
63.8 LD
2.4 km
2010 LY63
Sep 7
56 LD
1.2 km
2009 SH2
Sep 30
7.1 LD
45 m
1998 UO1
Oct 1
32.1 LD
2.1 km
2005 GE59
Oct 1
77 LD
1.1 km
2001 WN5
Oct 10
41.8 LD
1.0 km
1999 VO6
Oct 14
34.3 LD
1.8 km
1998 TU3
Oct 17
69.1 LD
5.3 km
1998 MQ
Oct 23
77.7 LD
1.9 km
2007 RU17
Oct 29
40.6 LD
1.0 km
2003 UV11
Oct 30
5 LD
595 m
3838 Epona
Nov 7
76.8 LD
3.4 km
2005 QY151
Nov 16
77.7 LD
1.3 km
2008 KT
Nov 23
5.6 LD
10 m
2002 EZ16
Nov 30
73.9 LD
1.0 km
2000 JH5
Dec 7
47 LD
1.5 km
2010 JL33
Dec 9
16.6 LD
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.
  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...
©2008, -- This site is penned daily by Dr. Tony Phillips.













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