You are viewing the page for Sep. 7, 2005
  Select another date:
<<back forward>>
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: 392.8 km/s
density:
5.2 protons/cm3
explanation | more data
Updated: Today at 2245 UT


X-ray Solar Flares

6-hr max:
X13+ 1740 UT Sep07
24-hr: X13+ 1740 UT Sep07
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 07 Sep '05

Tiny sunspot 805 poses no threat for strong solar flares. Credit: SOHO/MDI


Sunspot Number: 12
What is the sunspot number?
Updated: 06 Sep 2005

Far Side of the Sun

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

Interplanetary Mag. Field
Btotal: 5.2 nT
Bz:
3.1 nT south
explanation | more data
Updated: Today at 2246 UT

Coronal Holes:

There are no large coronal holes on the Earth-facing side of the sun.Image credit: NOAA Solar X-ray Imager.


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 Sep 06 2204 UTC
FLARE 0-24 hr 24-48 hr
CLASS M 40 % 50 %
CLASS X 05 % 10 %

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 Sep 06 2204 UTC
Mid-latitudes
0-24 hr 24-48 hr
ACTIVE 15 % 15 %
MINOR 05 % 05 %
SEVERE 01 % 01 %

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

What's Up in Space -- 7 Sep 2005
Subscribe to Space Weather News

Did you sleep through the latest aurora storm? Next time get a wake-up call: Sign up for SpaceWeather PHONE.

SOLAR FLARE: At 1740 UT on Sept. 7th, Earth-orbiting satellites detected a major solar flare, X13-class or stronger, coming from the sun's eastern limb. The source of the explosion was probably returning sunspot 798, which sparked strong auroras in August.

Today's blast was not Earth-directed, but explosions later this week (and next week) could be as the active region turns more and more toward our planet. September might be a good month for auroras; stay tuned.

Above: Today's solar flare, photographed from Earth-orbit by the GOES Solar X-ray Imager. The image is false-colored: the dim green disk is the sun; the bright white spot is the flare. Credit: NOAA/SEC.

SUNSET PLANETS: After two weeks of beautiful views, the sunset planet show is breaking up--but it's not over yet. Tonight, Sept. 7th, look west at sunset for one last look at the crescent Moon, Venus and Jupiter beautifully close together: sky map.

Above: Bright planets and a C-130 airplane over the Air Guard Armory in Charleston, WV, on Sept. 6th. Credit: John H. Schmidt M.D.

more images: from Laurent Laveder of Bretagne, France; from Eric Schandall of Manhattan, NY; from Paco Burguera Catala of Valencia, Spain; from William Olson of Ammon, ID; from Thad V'Soske near the Colorado National Monument; from Dan Oneal of Santa Cruz, CA; from Charles Tilley of Statesville, NC; from Mike O'Leary of El Cajon, CA; from Ronnie Sherrill of Troutman NC; from Jeff Stevens at Whitmore Lake, MI; from Robert T. Smith of Stoneville, NC; from Pete Lawrence of Selsey, UK;



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 7 Sep 2005 there were 710 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

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.

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; 2003; 2004; Jan-Mar., 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

You are visitor number 33436663 since January 2000.
©2019 Spaceweather.com. All rights reserved.