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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: 631.8 km/s
density:
4.1 protons/cm3
explanation | more data
Updated: Today at 2118 UT


X-ray Solar Flares

6-hr max:
A4 2100 UT Nov03
24-hr: B8 0445 UT Nov03
explanation | more data
Updated: Today at 2240 UT

Daily Sun: 03 Nov '05

Sunspots 818 and 819 pose no threat for strong solar flares. Credit: SOHO/MDI


Sunspot Number: 36
What is the sunspot number?
Updated: 02 Nov 2005

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: 4.9 nT
Bz:
1 nT south
explanation | more data
Updated: Today at 2118 UT

Coronal Holes:

A solar wind stream flowing from the indicated coronal hole could reach Earth on Nov. 4th. 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 02 2223 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 2005 Nov 02 2223 UTC
Mid-latitudes
0-24 hr 24-48 hr
ACTIVE 15 % 20 %
MINOR 05 % 10 %
SEVERE 01 % 01 %

High latitudes
0-24 hr 24-48 hr
ACTIVE 20 % 25 %
MINOR 05 % 15 %
SEVERE 01 % 05 %

What's Up in Space -- 3 Nov 2005
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AURORA WATCH: A high-speed solar wind stream is blowing past Earth and buffeting our planet's magnetic field. Sky watchers in Canada and Alaska should be alert for auroras tonight.

FIREBALL SIGHTINGS: In recent nights, sky watchers have seen some spectacular fireballs. Experts suspect it's the Taurid meteor shower, a display caused by debris from Comet Encke. (continued below)

Above: a Taurid fireball photographed by Hiroyuki Iida of Toyama, Japan on Oct. 28th.

Most years the Taurid shower is weak, producing few meteors, mostly dim. 2005 appears to be different. Earth may be passing through a "swarm" of pebbles and rocks within the larger cloud of Taurid space dust. The pebbles are responsible for the fireballs.

The 2005 Taurid meteor shower is not over. Indeed, it's just beginning. Forecasters expect the complex shower to peak during the first two weeks of November. So keep an eye on the sky! [full story]

NAME THAT PLANET: Astrophotographer Gary Palmer of Los Angeles snapped this picture yesterday. Do you recognize the planet?

No, it's not Mars. It's not even a planet. "It's the sun," says Palmer. "The morning sun at an altitude of 5o sure looked a lot like Mars. Low-hanging clouds created this unusual capture--along with a bit of false color."

"The hobby of solar imaging is rewarding in many ways; keeping it fun is at the top of my list." he says.



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 3 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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