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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: 610.4 km/sec
density: 1.2 protons/cm3
explanation | more data
Updated: Today at 2245 UT
X-ray Solar Flares
6-hr max: A0
2245 UT Apr06
24-hr: A0
0305 UT Apr06
explanation | more data
Updated: Today at: 2245 UT
Daily Sun: 06 Apr 08
The sun is blank--no sunspots. Credit: SOHO/MDI
Sunspot number: 0
What is the sunspot number?
Updated 06 Apr 2008
Far side of the Sun:
This holographic image reveals a possible sunspot on the far side of the sun. However, it may be an artifact of noise in the data processing. Check tomorrow's farside image for confirmation. Image credit: SOHO/MDI
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 5
storm
explanation | more data
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
What is the auroral oval?
Interplanetary Mag. Field
Btotal: 4.9 nT
Bz: 0.2 nT south
explanation | more data
Updated: Today at 2246 UT
Coronal Holes:
Earth is inside a solar wind stream flowing from the indicated coronal hole. Credit: Hinode X-ray Telescope.
SPACE WEATHER
NOAA Forecasts
Updated at: 2008 Apr 06 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: 2008 Apr 06 2203 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
30 %
25 %
MINOR
10 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
40 %
35 %
MINOR
15 %
10 %
SEVERE
05 %
05 %
What's up in Space
April 6, 2008
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.   mySKY

CRESCENT MOON ALERT: A crescent moon of perilous beauty is about to appear in the evening sky. The best night to look is Tuesday, April 8th, when the moon joins the Pleiades star cluster for a must-see conjunction: full story.

SOLAR ACTIVITY: "It may be solar minimum, but this looping prominence shows there is still plenty of action on the sun," says John Nassr, who sends this picture from his backyard observatory in the Baguio, the Philippines:

Subsequent photos by observers in Europe show the prominence changing shape and even lifting off the sun's surface. Such a dynamic structure may be unstable and eventually collapse. Could a Hyder flare be in the offing? Probably not, but monitoring is encouraged. (Note: A Hyder flare is a no-sunspot solar flare caused by the collapse of a magnetic filament or prominence.)

BONUS: "On Saturday, the flaming spaghetti strands of the prominence were magnificent," reports Larry Alvarez of Flower Mound, Texas, who made a video of the action using a Coronado Maxscope90. "The duration of the video is over 3 hours but I compressed it into a few seconds to show the motion."

more images: from Franck Charlier of Marines, Val d'Oise - France; from Mark Walters of Four Crosses, Powys, Wales, UK; from Joel Bavais of Anvaing, Belgium; from Adrian Guzman of San Jose California; from Mike Borman of Evansville, Indiana; from James Kevin Ty of Manila , Philippines; from Robert Arnold on the Isle of Skye, Scotland; from Emiel Veldhuis of Zwolle, the Netherlands; from Cai-Uso Wohler of Bispingen, Germany; from Stephen Ames of Hodgenville, Kentucky;

DARK MOZART: NASA's MESSENGER spacecraft has beamed back a new photo of Mozart, but it doesn't look much like Amadeus:

This is the Mozart, the crater. MESSENGER took the picture on January 14th during the spacecraft's historic flyby of Mercury. On that planet craters are named for people who have made important contributions to the arts--e.g., Mozart, Vivaldi, Matisse and others. Crater Mozart was christened in the 1970s after its discovery by Mariner 10, the first spacecraft to visit Mercury.

MESSENGER's new picture of Mozart shows something Mariner 10 missed: strange dark markings on the crater floor and dark rays shooting across the crater's upthrust rims. What is this material? No one knows, but it is probably kin to the mysterious dark halos found around other craters in nearby Caloris Basin. Spectral data gathered by Messenger and being analyzed now by mission scientists may yet reveal Mozart's composition.


March 2008 Aurora Gallery
[Aurora Alerts] [Night-sky Cameras]

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. [comment]
On April 6, 2008 there were 946 potentially hazardous asteroids.
April 2008 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2008 FH5
Apr. 2
7.6 LD
20
17 m
2001 QO142
Apr. 6
34 LD
17
685 m
2008 GF1
Apr. 7
0.8 LD
18
10 m
2005 BE2
Apr. 10
62 LD
18
1.0 km
2005 NB7
Apr. 17
16 LD
16
705 m
2008 FU6
Apr. 22
62 LD
16
1.4 km
2005 TB
Apr. 28
47 LD
18
1.3 km
2001 DQ8
Apr. 30
74 LD
17
1.1 km
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 Weather Prediction 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...
©2008, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
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