You are viewing the page for Jun. 24, 2009
  Select another date:
<<back forward>>
SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
SPACE WEATHER
Current conditions
Solar wind
speed: 479.4 km/sec
density: 4.7 protons/cm3
explanation | more data
Updated: Today at 2345 UT
X-ray Solar Flares
6-hr max: A0
2340 UT Jun24
24-hr: A0
2340 UT Jun24
explanation | more data
Updated: Today at: 2340 UT
Daily Sun: 24 June 09
Sunspot 1023 is a member of new Solar Cycle 24. Credit: SOHO/MDI
Sunspot number: 12
What is the sunspot number?
Updated 23 Jun 2009

Spotless Days
Current Stretch: 0 days
2009 total: 134 days (78%)
Since 2004: 645 days
Typical Solar Min: 485 days
explanation | more info
Updated 23 Jun 2009

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= 5 storm
24-hr max: Kp= 5
storm
explanation | more data
Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/POES
Interplanetary Mag. Field
Btotal: 4.2 nT
Bz: 0.4 nT south
explanation | more data
Updated: Today at 2346 UT
Coronal Holes:
A solar wind stream flowing from the indicated coronal hole should reach Earth on or about June 29th. Credit: SOHO Extreme UV Telescope
SPACE WEATHER
NOAA Forecasts
Updated at: 2009 Jun 24 2201 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: 2009 Jun 24 2201 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
05 %
MINOR
05 %
01 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
30 %
05 %
MINOR
15 %
01 %
SEVERE
05 %
01 %
What's up in Space
June 24, 2009

AURORA ALERT: Did you sleep through the Northern Lights? Next time get a wake-up call: Spaceweather PHONE.

 

SUNSPOT SYZYGY: Sunspot group 1023 has an eye-catching shape--it is a straight line. The group's four spots have formed a rare "sunspot syzygy." The formation makes a nice target for backyard solar telescopes.

more images: from Andy Dodson of Huirangi, New Zealand; from Pavol Rapavy of Observatory Rimavska Sobota, Slovakia; from Steve Wainwright of Swansea South Wales, UK;

SARYCHEV PEAK VOLCANO: Perfect timing. On June 12th, just as Russia's Sarychev Peak volcano was erupting for the first time in 20 years, the International Space Station flew directly overhead. Astronauts had their camera ready and snapped one of the most dramatic Earth-science photos ever taken from space:

Researchers are studying this rare photo to learn about the early stages of powerful volcanic eruptions. A few phenomena stand out:

(1) The volcano erupted with such force, the plume actually punched through the atmosphere. Note how clouds around the volcano have parted in a circular ring--that is a result of a shock wave produced by the upward blast. (2) The plume is a mixture of brown ash and white steam. A "dirty thunderstorm" complete with lightning could be in progress within the roiling cloud. (3) The smooth white bubble on top of the plume is probably a mass of water condensing from air shoved upward by the rising ash column. If so, it is akin to the iridescent pileus clouds sometimes featured on spaceweather.com.

If you're not amazed yet, try this: Put on a pair of red-blue stereo glasses and behold the eruption in 3D. The anaglyph was created by graphic artist Patrick Vantuyne of Belgium. No stereo glasses? A cross-eyed version is also available.

CROSS CURRENTS: Noctilucent clouds are not like other clouds. They light up at night, electric blue, after regular clouds go dark. They float so high above Earth (80 km--at the edge of space), they make ordinary clouds seem like ground huggers. And, of course, noctilucent clouds go their own way. All of these differences are on display in a movie made by German photographer Christoph Rollwagen. Click on the image to set the scene in motion (DivX required):


The movie is available in two formats: #1 (avi), #2 (mov)

"Yesterday evening, June 23rd, I noticed these noctilucent clouds shining through cirrus clouds above my home in Potsdam-Bornstedt," says Rollwagen. "It was a colorful and dynamic scene. Note how the noctilucent and cirrus clouds move in opposite directions."

"I made the movie using my Canon EOS 300Da," he adds.

Summer is the season for noctilucent clouds. Browse the gallery for more examples and observing tips:

2009 Noctilucent Photo Gallery
[previous years: 2008, 2007, 2006, 2005, 2004, 2003]


Explore the Sunspot Cycle

       
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 June 24, 2009 there were 1064 potentially hazardous asteroids.
June 2009 Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Mag.
Size
2009 KR21
June 1
0.7 LD
16
21 m
2009 KL8
June 1
5.1 LD
18
63 m
2003 QO104
June 9
36.8 LD
14
2.9 km
1994 CC
June 10
6.6 LD
13
1.2 km
2001 FE90
June 28
7.0 LD
13
435 m
2002 KL6
June 28
57.5 LD
16
1.4 km
2006 MV1
June 30
9.6 LD
23
20 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 Weather Prediction Center
  The official U.S. government space weather bureau
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.
STEREO
  3D views of the sun from NASA's Solar and Terrestrial Relations Observatory
Daily Sunspot Summaries
  from the NOAA Space Environment Center
Current Solar Images
  from the National Solar Data Analysis Center
Science Central
   
  more links...
   
©2008, SpaceWeather.com -- This site is penned daily by Dr. Tony Phillips.
©2013 Spaceweather.com. All rights reserved.