You are viewing the page for Oct. 2, 2012
  Select another date:
<<back forward>>
SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 449.4 km/sec
density: 0.1 protons/cm3
explanation | more data
Updated: Today at 2346 UT
X-ray Solar Flares
6-hr max: B6
2254 UT Oct02
24-hr: C1
1332 UT Oct02
explanation | more data
Updated: Today at: 2259 UT
Daily Sun: 02 Oct 12
There is some flare activity on the sun's NW limb; otherwise, the solar disk is mostly quiet. Credit: SDO/HMI
Sunspot number: 59
What is the sunspot number?
Updated 02 Oct 2012

Spotless Days
Current Stretch: 0 days
2012 total: 0 days (0%)
2011 total: 2 days (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
Since 2004: 821 days
Typical Solar Min: 486 days

Update 02 Oct 2012


The Radio Sun
10.7 cm flux: 128 sfu
explanation | more data
Updated 02 Oct 2012

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: 7.3 nT
Bz: 2.9 nT south
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 02 Oct 12
There are no large coronal holes on the Earth side of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2012 Oct 02 2200 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: 2012 Oct 02 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
05 %
MINOR
01 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
15 %
15 %
SEVERE
05 %
05 %
 
Tuesday, Oct. 2, 2012
What's up in space
 

Hang the Transit of Venus on your wall! Hubble-quality images from NASA's Solar Dynamics Observatory are now available as metallic posters in the Space Weather Store.

 
Venus Transit metal posters

EARTHSONG: A NASA spacecraft has recorded audio-frequency radio emissions coming from Earth. Some say the signals sound like whales; others liken them to the chirping of prairie dogs. What do you think? [audio] [video] [full story]

PLASMA PUFFS TARGET VENUS: Sunspot 1583 is in a near-constant state of eruption. Magnetic instabilities in the sunspot's magnetic canopy are hurling massive "puffs" of magnetized plasma into space. The Solar and Heliospheric Observatory caught some of them emerging during the early hours of Oct. 2nd; click to set the scene in motion:

Because AR1583 is on the farside of the sun, Earth is not in the line of fire. Venus, on the other hand, could receive a glancing blow from these clouds. Because Venus has no global magnetic field to protect it from solar storms, the impacts could erode small amounts of gas directly from the top of the planet’s atmosphere. Moreover, incoming plasma clouds can cause explosions in Venus's upper atmosphere called "hot flow anomalies." The space weather forecast for the second planet is stormy.

SUBSIDING STORM: A strong (Kp=7) geomagnetic storm sparked by a CME impact on Sept. 30th is subsiding. At maximum, during the early hours of Oct. 1st, Northern Lights descended as far south in the United States as Michigan, Maryland, Pennsylvania, Wisconsin, Ohio, Montana, Minnesota, Washington, Idaho, Illinois and South Dakota. Even California experienced some auroras. Tim Piya Trepetch caught a patch of sky turning purple over the Lassen Volcanic National Park:

"Purple auroras erupted right over Lassen Peak," says Trepetch.

California auroras are not as rare as some people think. The webmaster of spaceweather.com lives in California and has witnessed auroras no fewer than six times. The trick is knowing when to look. Aurora alerts: text, voice.

Realtime Aurora Photo Gallery

ISS CROSSING THE HARVEST MOON: Two nights ago, Bill Reyna of Sussex County, New Jersey, went outside to see the Harvest Moon (the full Moon closest to the autumnal equinox) when a winged shadow flitted across the lunar landscape. It was the International Space Station:

Reyna captured the station's silouette backlit by the Sea of Clouds (Mare Nubium) using a Canon 7D digital camera snapping pictures in HD video mode. "With the ISS moving at 4.6 miles per second at a range of 321 miles, it crossed the lunar disk in only .45 seconds," he says. "I knew exactly when to video-record the transit thanks to predictions from Calsky."

Realtime Space Weather Photo Gallery


Realtime Noctilucent Cloud Photo Gallery
[previous years: 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011]

  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 October 2, 2012 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2012 SL50
Sep 27
2.8 LD
--
22 m
2012 SY49
Sep 28
2.6 LD
--
29 m
2012 SJ58
Oct 3
5.9 LD
--
23 m
1998 UO1
Oct 4
60.1 LD
--
2.1 km
2005 GQ21
Oct 12
77 LD
--
1.0 km
1998 ST49
Oct 18
28.7 LD
--
1.3 km
1991 VE
Oct 26
34 LD
--
1.1 km
2001 CV26
Oct 30
68 LD
--
2.4 km
2007 PA8
Nov 5
16.8 LD
--
2.4 km
2010 JK1
Nov 25
9.3 LD
--
56 m
2009 LS
Nov 28
55.2 LD
--
1.1 km
2009 BS5
Dec 11
8.4 LD
--
15 m
4179 Toutatis
Dec 12
18 LD
--
2.7 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 web 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.
STEREO
  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
Heliophysics
  the underlying science of space weather
Trade Show Displays
   
  more links...
©2010 Spaceweather.com. All rights reserved. This site is penned daily by Dr. Tony Phillips.
©2013 Spaceweather.com. All rights reserved.