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

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Science news and information about the Sun-Earth environment.

SPACE WEATHER
Current
Conditions

Solar Wind
speed: 449.6 km/s
density:
2.1 protons/cm3
explanation | more data
Updated: Today at 2245 UT


X-ray Solar Flares

6-hr max:
A9 1755 UT Jan02
24-hr: B4 0000 UT Jan02
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 02 Jan '06

These sunspots do not pose a threat for strong solar flares. Credit: SOHO/MDI


Sunspot Number: 41
What is the sunspot number?
Updated: 01 Jan 2006

Far Side of the Sun

This holographic image reveals no large sunspots on the far side of the sun. Image credit: SOHO/MDI

Interplanetary Mag. Field
Btotal: 3.3 nT
Bz:
0.6 nT south
explanation | more data
Updated: Today at 2246 UT

Coronal Holes:

There are no large coronal holes on the sun today. Image 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 Jan 02 2203 UTC
FLARE 0-24 hr 24-48 hr
CLASS M 05 % 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 Jan 02 2203 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 10 % 10 %
MINOR 05 % 05 %
SEVERE 01 % 01 %

What's Up in Space -- 2 Jan 2006
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The space station is visible in the night sky this month. Would you like to see it? Sign up for SpaceWeather PHONE.

METEOR SHOWER: The first meteor shower of 2006, the Quadrantids, peaks on Jan. 3rd at 18:20 Universal Time. The timing favors Japan and, to a lesser extent, Hawaii where dark-sky observers should see 40+ faint meteors per hour just before dawn (Tuesday morning in Hawaii, Wednesday morning in Japan). North Americans can expect to see perhaps half that many: full story.

DARK FILAMENTS: Astronomers are monitoring a sprawling network of dark filaments on the sun. Eric Roel of Valle de Bravo, México, took this picture of them yesterday:

Filaments are enormous ribbons of hydrogen gas held above the sun's surface by magnetic force fields. The longest one in Roel's picture snakes 430,000+ miles from end to end--almost twice the distance from Earth to the Moon. Sometimes filaments collapse and explode. What will happen to these? Stay tuned.

AURORA MEGA-GALLERY: Have you ever wondered what it would be like to fly through the aurora borealis? Can you see auroras from Florida? Is there a season for geomagnetic storms? Answers await in the new Aurora Mega-Gallery.

Above: "For several hours on Nov. 7, 2004, the northern horizon shimmered red and green," recalls Anthony Arrigo of Park City, Utah, who was alerted to the show by a Spaceweather PHONE call.



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 2 Jan 2006 there were 755 known Potentially
Hazardous Asteroids

January 2006 Earth-asteroid encounters
ASTEROID

 DATE
(UT)

MISS DISTANCE

MAG.

 SIZE
(meters)
2005 XO4

Jan. 1

18.5 LD

20+

~150 m
2005 YM128

Jan. 1

19.8 LD

19

~75 m
2005 YO128

Jan. 3

6.5 LD

16

~60 m
2005 YU8

Jan. 13

19.8 LD

19

~70 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. See also Snow Crystals.

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 --a gallery of up-to-date solar pictures from the National Solar Data Analysis Center at the Goddard Space Flight Center. See also the GOES-12 Solar X-ray Imager.

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

SOHO Farside Images of the Sun from SWAN and MDI.

The Latest SOHO Coronagraph Images -- from the Naval Research Lab

The Sun from Earth -- daily images of our star from the Big Bear Solar Observatory

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

Observable Comets -- from the Harvard Minor Planet Center.

What is the Interplanetary Magnetic Field? -- A lucid answer from the University of Michigan. See also the Anatomy of Earth's Magnetosphere.

Real-time Solar Wind Data -- from NASA's ACE spacecraft. How powerful are solar wind gusts? Read this story from Science@NASA.

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

Aurora Forecast --from the University of Alaska's Geophysical Institute

Lists of Coronal Mass Ejections -- from 1998 to 2001

Mirages: Mirages in Finland; An Introduction to Mirages;

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

Space Audio Streams: (University of Florida) 20 MHz radio emissions from Jupiter: #1, #2, #3, #4; (NASA/Marshall) INSPIRE: #1; (Stan Nelson of Roswell, New Mexico) meteor radar: #1, #2;

Recent International Astronomical Union Circulars

GLOSSARY | SPACE WEATHER TUTORIAL

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

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