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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids

SpaceWeather.com
Science news and information about the Sun-Earth environment.

SPACE WEATHER
Current
Conditions

Solar Wind
speed: 321.1 km/s
density:
2.2 protons/cm3
explanation | more data
Updated: Today at 2246 UT

X-ray Solar Flares
6-hr max:
A2 2200 UT Dec28
24-hr: A2 2200 UT Dec28
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 28 Dec '06

Sunspots 931 and 932 are fading away, leaving the sun blank and quiet. Credit:
SOHO/MDI

Sunspot Number: 23
What is the sunspot number?
Updated: 27 Dec 2006

Far Side of the Sun

This holographic image reveals a sunspot on the far side of the sun--it is old friend sunspot 930, which caused spectacular auroras in mid-December when it was on the Earth-facing side of the sun. Image credit: SOHO/MDI

Interplanetary Mag. Field
Btotal: 2.3 nT
Bz:
2 nT south
explanation | more data
Updated: Today at 2247 UT

Coronal Holes:

A solar wind stream flowing from the indicated coronal hole might hit Earth on Jan. 2nd. Credit: SOHO Extreme UV Telescope


SPACE WEATHER
NOAA
Forecasts

Solar Flares: Probabilities for a medium-sized (M-class) or a major (X-class) solar flare during the next 24/48 hours are tabulated below.
Updated at 2006 Dec 28 2204 UTC
FLARE 0-24 hr 24-48 hr
CLASS M 01 % 01 %
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 2006 Dec 28 2204 UTC
Mid-latitudes
0-24 hr 24-48 hr
ACTIVE 10 % 10 %
MINOR 05 % 05 %
SEVERE 01 % 01 %

High latitudes
0-24 hr 24-48 hr
ACTIVE 15 % 15 %
MINOR 05 % 05 %
SEVERE 01 % 01 %

What's Up in Space -- 28 Dec 2006
Subscribe to Space Weather News

Did you sleep through the auroras of Dec. 14th? Next time get a wake-up call: Spaceweather PHONE.

SOLAR IMAX: Set your browser to full screen. Gary Palmer of Los Angeles has assembled some of the most photogenic solar flares of 2006. "These IMAX-style movies are designed to be experienced full screen and beyond..." he says. Click here for action!

SPACESHIP SIGHTING: "After receiving more than 16 feet of snow in the past 2 months here in Whistler, British Columbia, last night was the first clear night in 65 days," say photographers John Nemy and Carol Legate. Perfect timing. The clouds parted to reveal a beautiful flyby of the International Space Station:

"The space station popped out from behind Sproat Mountain and slowly glided over Whistler village--very pretty," say Nemy and Legate who "wish everyone up there and down here a Happy New Year."

Note: With the space shuttle back in action, assembly of the International Space Station has resumed. In September 2006, astronauts added a pair of 240-foot solar wings and a 17.5-ton truss to the growing station. In December, another 2-ton truss was added.

Shouldn't these additions improve the station's visibility? Some sky watchers say "yes"--the ISS is brighter than before, they report, and sometimes glows with a coppery hue, the color of sunlight reflected from solar arrays. The observations are encouraging but anecdotal. More data are needed for confirmation.

Ready to see for yourself? Check Heavens Above for flyby times or get a personalized phone call when the ISS is about to fly over your home town.



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 28 Dec 2006 there were 831 known Potentially
Hazardous Asteroids

Dec 2006 Earth-asteroid encounters
ASTEROID

 DATE
(UT)

MISS DISTANCE

MAG.

 SIZE
2006 WQ127

Dec. 2

7.9 LD

19

~94 m
2006 WB

Dec. 5

7.0 LD

17

~130 m
2004 XL14

Dec. 20

10.1 LD

15

~225 m
2006 XD2

Dec. 24

10.7 LD

16

~260 m
Notes: LD is a "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 Environment Center -- The official U.S. government bureau for real-time monitoring of solar and geophysical events, research in solar-terrestrial physics, and forecasting solar and geophysical disturbances.

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. (European Mirror Site)

Daily Sunspot Summaries -- from the NOAA Space Environment Center.

Current Solar Images -- from the National Solar Data Analysis Center

X-ray images of the Sun: GOES-12 and GOES-13

Recent Solar Events -- a summary of current solar conditions from lmsal.com.

What is the Magnetosphere?

The Lion Roars -- visit this site to find out what the magnetosphere sounds like.

List of Potentially Hazardous Asteroids -- from the Harvard Minor Planet Center.

Observable Comets -- from the Harvard Minor Planet Center.

Real-time Solar Wind Data -- from NASA's ACE spacecraft.

How powerful are solar wind gusts? Not very! Read this story from Science@NASA.

More Real-time Solar Wind Data -- from the Solar and Heliospheric Observatory Proton Monitor.

Lists of Coronal Mass Ejections -- from 1996 to 2006

Mirages: Mirages in Finland; An Introduction to Mirages;

NOAA Solar Flare and Sunspot Data: 1994, 1995, 1996, 1997, 1998, 1999; 2000; 2001; 2002; 2003; 2004; 2005; Jan-Mar 2006; Apr-Jun 2006; Jul-Sep 2006; Oct-Dec 2006.

This site is penned daily by Dr. Tony Phillips: email


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