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


X-ray Solar Flares

6-hr max:
A5 2040 UT Jul10
24-hr: A8 1625 UT Jul10
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 10 Jul '06

Sunspot 898 no longer poses a threat for Earth-directed solar flares. Credit: SOHO/MDI


Sunspot Number: 33
What is the sunspot number?
Updated: 09 Jul 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: 8.4 nT
Bz:
5.5 nT north
explanation | more data
Updated: Today at 2246 UT

Coronal Holes:

A solar wind stream flowing from this coronal hole could hit Earth on July 11th or 12th. 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 Jul 10 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 Jul 10 2203 UTC
Mid-latitudes
0-24 hr 24-48 hr
ACTIVE 15 % 30 %
MINOR 05 % 15 %
SEVERE 01 % 05 %

High latitudes
0-24 hr 24-48 hr
ACTIVE 20 % 35 %
MINOR 10 % 25 %
SEVERE 01 % 15 %

What's Up in Space -- 10 Jul 2006
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THUNDER MOON: Picture this: You step outside on a warm summer evening. In the distance, a stroke of lightning lunges to Earth. One-one-thousand, two-one-thousand, three-one-thousand. The air shakes with thunder and, at that moment, the clouds part to reveal a brilliant full Moon.

Too good to be true? It could happen tonight. There's a full Moon out, the "Thunder Moon", named after the storms of summer. Step outside and see what happens: sky map.

Above: "The scene was breathtaking," says Arnel C. Manlises, who took this picture from the Philippines. "Majestic clouds reached up to the Moon while the silhouette of a solitary boat headed out to sea in calm waters."

OVER THE EDGE: Crackling, fragmenting, big-as-Neptune sunspot 898 is about to vanish. The sun's rotation is carrying it over the western limb, out of sight:


An eight-day movie of sunspot 898. Credit Pavol Papavy.

Solar observers should keep an eye on the sun's limb today as sunspot 898 passes over. The active region could spew clouds of hot plasma thousands of kilometers high where they can be seen glowing against the black of space.



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 10 Jul 2006 there were 796 known Potentially
Hazardous Asteroids

July 2006 Earth-asteroid encounters
ASTEROID

 DATE
(UT)

MISS DISTANCE

MAG.

 SIZE
2004 XP14

Jul 3

1.1 LD

12

600 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

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;

Recent International Astronomical Union Circulars

GLOSSARY | SPACE WEATHER TUTORIAL

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


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