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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: 308.0 km/s
density:
1.5 protons/cm3
explanation | more data
Updated: Today at 2246 UT


X-ray Solar Flares

6-hr max:
B4 2245 UT Nov07
24-hr: C6 1345 UT Nov07
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 07 Nov '06

Sunspots 921 and 922 are decaying rapidly.Credit:
SOHO/MDI

Sunspot Number: 30
What is the sunspot number?
Updated: 06 Nov 2006

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: 3.1 nT
Bz:
1.2 nT north
explanation | more data
Updated: Today at 2247 UT

Coronal Holes:

A solar wind stream flowing from the indicated coronal hole should reach Earth on or about Nov. 9th. Credit: NOAA GOES-13.


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 Nov 07 2204 UTC
FLARE 0-24 hr 24-48 hr
CLASS M 20 % 20 %
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 Nov 07 2204 UTC
Mid-latitudes
0-24 hr 24-48 hr
ACTIVE 10 % 35 %
MINOR 05 % 15 %
SEVERE 01 % 05 %

High latitudes
0-24 hr 24-48 hr
ACTIVE 15 % 45 %
MINOR 10 % 30 %
SEVERE 01 % 15 %

What's Up in Space -- 7 Nov 2006
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Autumn is here, and it's a wonderful time for stargazing. Find out what's up from Spaceweather PHONE.

SOLAR ACTIVITY: An explosion on the sun yesterday produced a burst of 18-22 MHz radio waves so intense "it sounded like a freight train rolling through," says astronomer Thomas Ashcraft. He recorded the sounds using his shortwave radio telescope in New Mexico: listen.


An eruption behind the sun's limb, Nov. 7, 2006. Credit: SOHO.

The source of the blast was an active sunspot hiding just behind the sun's eastern limb. For days it has been erupting and throwing clouds of magnetized gas high above the sun's surface where we can see them. Soon, we'll see the sunspot itself. The sun's rotation is turning the spot toward Earth and it could emerge later today. Stay tuned.

TRANSIT OF MERCURY: On Wednesday, Nov. 8th, Mercury will pass directly in front of the sun--a rare transit visible from the Americas, Hawaii and all around the Pacific Rim. The action begins at 2:12 p.m. EST (11:12 a.m. PST) and lasts for nearly five hours.


The Transit of Mercury, simulated by graphic artist Larry Koehn.

Because Mercury is so small, only a tiny fraction of the sun will be covered. So don't stare at the sun on Wednesday--it will be as blinding as ever. Instead, try to view the event through a properly-filtered solar telescope. Mercury's tiny, jet-black silhouette passing in front of solar prominences, filaments and sunspots should be a marvelous sight.

BONUS: To inspire the artists among us, Mark Seibold of Portland, Oregon, contibutes this pastel sketch of the 1999 Transit of Mercury. Looking through an H-alpha telescope seven years ago, "I could see the planet hovering in the orange hazy fog of the solar photosphere," recalls Mark. "It was an awesome sight."



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 7 Nov 2006 there were 825 known Potentially
Hazardous Asteroids

Oct-Nov 2006 Earth-asteroid encounters
ASTEROID

 DATE
(UT)

MISS DISTANCE

MAG.

 SIZE
2006 UC185

Oct. 23

6.3 LD

17

95 m
2006 UZ215

Oct. 27

7.6 LD

19

35 m
2006 UJ185

Oct. 30

0.7 LD

17

10 m
2006 UA216

Oct. 31

6.0 LD

16

90 m
2006 UQ216

Nov. 7

5.6 LD

21

15 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 --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.

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.

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; 2005; Jan-Mar 2006;

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;

GLOSSARY | SPACE WEATHER TUTORIAL

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


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