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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 385.4 km/sec
density: 0.0 protons/cm3
explanation | more data
Updated: Today at 2342 UT
X-ray Solar Flares
6-hr max: M4
2201 UT Nov02
24-hr: M4
2201 UT Nov02
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 02 Nov 11
New sunspot 1339 poses a threat for M-class solar flares. Credit: SDO/HMI
Sunspot number: 141
What is the sunspot number?
Updated 01 Nov 2011

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

Updated 01 Nov 2011


The Radio Sun
10.7 cm flux: 139 sfu
explanation | more data
Updated 01 Nov 2011

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 4
unsettled
explanation | more data
Interplanetary Mag. Field
Btotal: 5.1 nT
Bz: 0.2 nT north
explanation | more data
Updated: Today at 2346 UT
Coronal Holes: 01 Nov 11
There are no large coronal holes on the Earthside of the sun. Credit: SDO/AIA.
SPACE WEATHER
NOAA Forecasts
Updated at: 2011 Nov 02 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
50 %
50 %
CLASS X
05 %
05 %
Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at: 2011 Nov 02 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
15 %
MINOR
01 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
20 %
MINOR
01 %
10 %
SEVERE
01 %
01 %
 
Wednesday, Nov. 2, 2011
What's up in space
 

Turn your cell phone into a field-tested satellite tracker. Works for Android and iPhone.

 
Satellite flybys

HISTORIC SPACE DOCKING: China's new space station, the Tiangong 1, is making a series of pre-dawn flybys over North America this week. People who wake up to see the "Heavenly Palace" might spot a second spacecraft nearby: Shenzhou 8, an unmanned vessel launched Oct 31st is chasing the space station for China's first space docking. The rendezvous could occur as early as Nov. 2nd. Check the Satellite Tracker or your smartphone for local flyby times.

double flyby photos: from Bryan Murahashi of San Jose, California

BIG SUNSPOT: A large sunspot group is rotating over the sun's northeastern limb, possibly signaling an uptick in solar activity. Amateur astronomer Pavol Rapavy of Slovakia took this picture just a few hours ago:

Measuring some 40,000 km wide and at least twice that in length, the behemoth active region is an easy target for backyard solar telescopes. Astronomers are encouraged to monitor the region: NOAA forecasters estimate a 60% chance of M-class solar flares during the next 24 hours. Eruptions today would not be Earth directed, but future eruptions could be as the sunspot turns toward our planet in the days ahead. Solar flare alerts: text, voice.

NORTHERN LIGHTS: November began with a geomagnetic storm. A shock wave in the solar wind swept past Earth during the early hours of Nov 1st, sparking strong magnetic disturbances around the Arctic Circle. Paul Beebe sends this report from Upsala, Canada: "I awoke around 6:30 am and saw auroras out my bedroom window. They were dancing like green flames in the northern sky, with the occasional spike of pink or red barely visible." He quickly dressed and headed to the shores of nearby Lang Lake for this shot:

More auroras are possible on Nov. 4th. A coronal mass ejection (CME) left the sun on Oct. 31st when a solar filament erupted; the cloud could deliver a glancing blow to Earth's magnetic field this Thursday. Aurora alerts: text, voice.

October 2011 Aurora Gallery
[previous Octobers: 2010, 2009, 2008, 2007, 2006, 2004, 2003, 2002]

  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 November 2, 2011 there were 1256 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2011 UX255
Oct 28
0.4 LD
--
15 m
2011 FZ2
Nov 7
75.9 LD
--
1.6 km
2005 YU55
Nov 8
0.8 LD
--
200 m
2011 UT91
Nov 15
9.9 LD
--
102 m
1994 CK1
Nov 16
68.8 LD
--
1.5 km
1996 FG3
Nov 23
39.5 LD
--
1.1 km
2003 WM7
Dec 9
47.6 LD
--
1.6 km
1999 XP35
Dec 20
77.5 LD
--
1.0 km
2000 YA
Dec 26
2.9 LD
--
80 m
2011 SL102
Dec 28
75.9 LD
--
1.1 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
Science Central
 
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