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

X-ray Solar Flares

6-hr max:
B2 2235 UT Oct17
24-hr: B8 0930 UT Oct17
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 17 Oct '03
A new and possibly large sunspot is emerging over the sun's northeastern limb. Image credit: SOHO MDI

The Far Side of the Sun

This holographic image reveals one large sunspot on the far side of the Sun. Image credit: SOHO/MDI


Sunspot Number: 28
What is the sunspot number?
Updated: 16 Oct 2003

Coronal Holes:

Earth is inside a solar wind stream flowing from the indicated coronal hole. Image credit: SOHO Extreme UV Telescope
More about coronal holes

Interplanetary Mag. Field
Btotal: 7.1 nT
Bz:
2.6 nT south
explanation | more data
Updated: Today at 2247 UT


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 2003 Oct 17 2200 UTC
FLARE 0-24 hr 24-48 hr
CLASS M 05 % 05 %
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 2003 Oct 17 2200 UTC
Mid-latitudes
0-24 hr 24-48 hr
ACTIVE 35 % 30 %
MINOR 20 % 15 %
SEVERE 10 % 05 %

High latitudes
0-24 hr 24-48 hr
ACTIVE 35 % 35 %
MINOR 30 % 25 %
SEVERE 25 % 15 %

What's Up in Space -- 17 Oct 2003
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WATCHING HISTORY: China's first manned spacecraft, the Shenzhou V, soared over the United States three times on Oct. 15th. Many people saw it just before dawn, gliding across the sky about as bright as a 2nd magnitude star. This picture of the streaking capsule comes from Dirk Obudzinski of Santa Cruz, California. The bright star above the tree is Polaris.

more images: from Ian Griffin of Aberdeen, Maryland; from David Batchelor of Las Vegas, Nevada; from Lymex Zhang of Dalian, China;

VENUS RETURNS: It's not easy to see, but if you look carefully at the western horizon just after sunset, you might catch a glimpse of Venus shining through the rosy twilight. Photographer Thad V'Soske did and captured this lucky picture of the planet and a commercial aircraft on approach to the San Diego Int'l Airport:

Although Venus is the brightest of all planets, it has been out of sight since August when its orbit carried it behind the sun. Venus is re-emerging now in the evening sky, where it will become a truly eye-catching sight in November.

AURORA WATCH: Earth remains inside a solar wind stream that could spark mild geomagnetic storms tonight. High latitude sky watchers should be alert for auroras. ("High latitude" means, e.g., New Zealand, southern Australia, Alaska, Canada, and US northern border states from Maine to Washington.) [gallery]

Would you like a phone call when auroras appear over your home town? Sign up for Spaceweather PHONE.



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 17 Oct 2003 there were 536 known Potentially
Hazardous Asteroids

October 2003 Earth-asteroid encounters
ASTEROID

 MISS DISTANCE

 MAG.
2003 SS84

Oct. 11

8 LD

 17
1998 FG2

Oct. 21

15 LD

 17
2003 TL4

Oct. 26

12 LD

 15
2001 KZ66

Oct. 30

31 LD

 16
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 Soft 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

Daily Solar Flare and Sunspot Data -- from the NOAA Space Environment Center.

Lists of Coronal Mass Ejections -- from 1998 to 2001

What is an Iridium flare? See also Photographing Satellites by Brian Webb.

Vandenberg AFB missile launch schedule.

What is an Astronomical Unit, or AU?

Mirages: Mirages in Finland; An Introduction to Mirages;

NOAA Solar Flare and Sunspot Data: 1999; 2000; 2001; 2002; Jan-Mar., 2003; Apr-Jun., 2003;

Recent International Astronomical Union Circulars

GLOSSARY | SPACE WEATHER TUTORIAL

 

 

 




 

 
Editor's Note: Space weather and other forecasts that appear on this site are formulated by Dr. Tony Phillips. They are not official statements of any government agency (including NASA) nor should they be construed as guarantees of space weather or other celestial activity.

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Dr. Tony Phillips
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