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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
SPACE WEATHER
Current conditions
Solar wind
speed: 327.8 km/sec
density: 2.4 protons/cm3
explanation | more data
Updated: Today at 2244 UT
X-ray Solar Flares
6-hr max: A0
2115 UT Sep19
24-hr: A0
2115 UT Sep19
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 19 Sep 07
The sun is blank--no sunspots. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 18 Sep 2007
Far side of the Sun:
This holographic image reveals no sunspots on the far side of the sun. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Updated: 2007 Sep 19 2129 UT
Interplanetary Mag. Field
Btotal: 5.6 nT
Bz: 5.4 nT north
explanation | more data
Updated: Today at 2245 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole should reach Earth on Sept. 21st or 22nd. Credit: SOHO Extreme UV Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2007 Sep 19 2203 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
01 %
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: 2007 Sep 19 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
15 %
MINOR
01 %
10 %
SEVERE
01 %
05 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
15 %
MINOR
05 %
10 %
SEVERE
01 %
05 %
What's up in Space
September 19, 2007
Where's Saturn? Is that a UFO--or the ISS? What's the name of that star? Get the answers from mySKY--a fun new astronomy helper from Meade. .

PERUVIAN METEORITE: Evidence is mounting that a meteorite really did strike Peru last Saturday: A scientist from Peru's Geological, Mining and Metallurgical Institute says that a chondritic space rock lies at the bottom of the water-filled crater near the Peru-Bolivia border. In a related development, Peru's Regional Health Directorate reports an outbreak of dizziness, nausea and dermal injuries among people who have visited the impact site. The injuries are "not serious," according Regional Health Director Jorge López. Stay tuned for updates.

TRILOBITES INVADE THE SUN: Last week in Boulder, Colorado, scientists converged on the "Living With A Star" workshop to share the latest research in solar physics. At one point, nearly 200 participants sat slack-jawed as they watched a new movie recorded by Japan's Hinode spacecraft showing a sunspot emerging from the depths of the sun:


Click to launch the 19 MB movie.

According to some observers, the emerging spot resembled nothing less than a swimming planet-sized trilobite. The unexpected form and behavior of the sunspot is both a challenge and delight to researchers working to understand solar activity. Get the full story from Science@NASA.

RAINBOW BLOB: "Last week, I was in New Mexico where we are constructing the SpaceSpot Observatory and a microburst of rain formed nearby," reports amateur astronomer Steve Cullen. "Within the microburst, a rainbow 'blob' became visible. It had all the colors of a rainbow but none of the usual structure." What happened to the rest of the rainbow? (continued below)

"This is rainbow fragment," explains atmospheric optics expert Les Cowley. "From where the photographer is standing, the spread of raindrops is too small to light up more of the bow. If Steve was much closer he would not only have got very wet but he would have seen more rainbow. These fragments are often oddly shaped and even distant rain makes them. But beware, not all that is colored is a rainbow!"


September 2007 Aurora Gallery
[August 2007 Aurora Gallery] [Aurora Alerts]

Near-Earth Asteroids
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 September 19, 2007 there were 886 potentially hazardous asteroids.
Sept. 2007 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2007 RF1
Sep. 2
8.5 LD
18
26 m
2007 RS1
Sep. 5
0.2 LD
17
3 m
2007 RJ1
Sep. 16
2.5 LD
16
40 m
2007 RC20
Sep. 20
5.1 LD
19
22 m
Notes: LD means "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 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.
Daily Sunspot Summaries
  From the NOAA Space Environment Center
Current Solar Images
  from the National Solar Data Analysis Center
  more links...
©2007, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
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