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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: 529.8 km/s
density:
9.9 protons/cm3
explanation | more data
Updated: Today at 2245 UT


X-ray Solar Flares

6-hr max:
C1 1650 UT Jun14
24-hr: C7 1545 UT Jun14
explanation | more data
Updated: Today at 2245 UT

Daily Sun: 14 Jun '05

Sunspot 775 is crackling with C-class solar flares; it could unleash a stronger M-flare before it rounds the western limb later this week. Credit: SOHO/MDI


Sunspot Number: 73
What is the sunspot number?
Updated: 13 Jun 2005

Far Side of the Sun

This holographic image reveals no large sunspots (but maybe one small one) on the far side of the sun. Image credit: SOHO/MDI

Interplanetary Mag. Field
Btotal: 8.8 nT
Bz:
3.1 nT north
explanation | more data
Updated: Today at 2247 UT

Coronal Holes:

There are no large coronal holes on the Earth-facing side of the sun today. 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 Jun 14 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 2005 Jun 14 2204 UTC
Mid-latitudes
0-24 hr 24-48 hr
ACTIVE 25 % 25 %
MINOR 15 % 15 %
SEVERE 05 % 05 %

High latitudes
0-24 hr 24-48 hr
ACTIVE 30 % 30 %
MINOR 15 % 15 %
SEVERE 05 % 05 %

What's Up in Space -- 14 Jun 2005
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Auroras for Father's Day? It could happen. Sign him up for SpaceWeather PHONE.

AURORA WATCH: A coronal mass ejection (CME) swept past Earth on June 14th at 1800 UT, but its impact did not trigger a geomagnetic storm. Meanwhile, another CME is on the way. It was propelled into space today by a C-class explosion near sunspot 775: movie. Sky watchers should be alert for auroras when the CME arrives, probably on June 16th.

HINT: Midnight is the best time for aurora-watching. That's when Shawn Malone saw these lights over Marquette, Michigan, on June 13th:

What's special about midnight? At that time of night, the sky above you is physically close to Earth's magnetic tail. The so-called "magnetotail" is a region of our planet's magnetic field stretched out by the solar wind and filled with energetic particles that feed aurora storms. If you like auroras, getting close to the magnetotail is a good thing.

SUN HALO AND OLD GLORY: "This beautiful sun halo was easily visible [yesterday] at about 11:00 a.m.," says Gary Pittman of Marion, Kansas.

Sun halos are a reminder that no matter how hot it gets on the ground, there's a cooler place above your head ... about 10 km high. At that altitude, tiny ice crystals float in freezing cirrus clouds. The crystals intercept and bend sunlight into eye-catching halos. Keep looking up!



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 14 Jun 2005 there were 703 known Potentially
Hazardous Asteroids

June-July 2005 Earth-asteroid encounters
ASTEROID

 DATE (UT)

 MISS DISTANCE

 MAG.
2005 LM3

June 3

4.0 LD

 18
2005 LU3

June 4

4.9 LD

 20
2005 LD

June 19

7.1 LD

 17
2000 AG6

July 22

8.7 LD

 20
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

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