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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: 410.6 km/s
density:
2.9 protons/cm3
explanation | more data
Updated: Today at 2245 UT


X-ray Solar Flares

6-hr max:
C1 2020 UT Nov19
24-hr: C3 0000 UT Nov19
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 19 Nov '05

Sunspot 822 poses a threat for M-class solar flares. Credit: SOHO/MDI


Sunspot Number: 51
What is the sunspot number?
Updated: 18 Nov 2005

Far Side of the Sun

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

Interplanetary Mag. Field
Btotal: 7.8 nT
Bz:
0.2 nT north
explanation | more data
Updated: Today at 2245 UT

Coronal Holes:

There are no large coronal holes on the Earth-facing side of 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 2005 Nov 19 2204 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 2005 Nov 19 2204 UTC
Mid-latitudes
0-24 hr 24-48 hr
ACTIVE 15 % 25 %
MINOR 05 % 15 %
SEVERE 01 % 10 %

High latitudes
0-24 hr 24-48 hr
ACTIVE 25 % 35 %
MINOR 10 % 20 %
SEVERE 05 % 10 %

What's Up in Space -- 19 Nov 2005
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Did you miss the aurora storms of Sept.? Next time get a wake-up call: Sign up for SpaceWeather PHONE.

SOLAR ACTIVITY: Sunspot 822 poses a continuing threat for M-class solar flares. Because the 'spot is crossing the middle of the sun, any eruptions this weekend would be Earth-directed and could spark geomagnetic storms on our planet. Stay tuned for updates.

STATION SIGHTINGS: The International Space Station (ISS) is flying over many US towns and cities this month--it's bright and easy to see. In Albany, Missouri, last night, Dan Bush snapped this picture of the ISS streaking through the Milky Way:

The bright light just above the fence is Venus. Would you like to witness a beautiful scene like this? Sign up for Spaceweather PHONE and get a call when the ISS is about to streak over the skies of your home towm.

SUNRISE: "As the sun rose this morning [Nov. 15th], I captured this picture through some nearby pine trees," says Gary Palmer of Los Angeles, California:

Why is the sun purple? Palmer took the picture using a "CaK" filter tuned to the violet glow of singly-ionized calcium in the sun's atmosphere. CaK filters reveal intense magnetic fields--the stuff of sunspots. Look between the branches near the top of the disk. That's giant 'spot 822.

"Each day is a new adventure," says Palmer. "You never know what you're going to see."

more images: from Mila Zinkova of San Francisco, CA; from Didier Favre of Brétigny sur Orge, France; from Gary Palmer of Los Angeles, CA; from Robert Arnold on the Isle of Skye, Scotland; from Peter Paice of Belfast, Northern Ireland; from Russell Horn of Crowell, Texas;



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 are on a collision course with our planet, although astronomers are finding new ones all the time.

On 19 Nov 2005 there were 736 known Potentially
Hazardous Asteroids

August 2005 Earth-asteroid encounters
ASTEROID

 DATE (UT)

 MISS DISTANCE

 MAG.
1992 UY4

August 8

16 LD

 12
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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