You are viewing the page for Jun. 16, 2011
  Select another date:
<<back forward>> -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
Solar wind
speed: 477.5 km/sec
density: 1.0 protons/cm3
explanation | more data
Updated: Today at 2344 UT
X-ray Solar Flares
6-hr max: B5
1934 UT Jun16
24-hr: C7
1022 UT Jun16
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 16 Jun 11
The magnetic field of sunspot group 1236 harblors energy for M-class solar flares. Credit: SDO/HMI
Sunspot number: 48
What is the sunspot number?
Updated 15 Jun 2011

Spotless Days
Current Stretch: 0 days
2011 total: 1 day (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
Since 2004: 820 days
Typical Solar Min: 486 days

Updated 15 Jun 2011

The Radio Sun
10.7 cm flux: 102 sfu
explanation | more data
Updated 15 Jun 2011

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
explanation | more data
Interplanetary Mag. Field
Btotal: 4.1 nT
Bz: 0.9 nT north
explanation | more data
Updated: Today at 2344 UT
Coronal Holes: 16 Jun 11
A solar wind stream flowing from the indicated coronal hole could reach Earth on or about June 22nd. Credit: SDO/AIA.
NOAA Forecasts
Updated at: 2011 Jun 16 2200 UTC
0-24 hr
24-48 hr
25 %
25 %
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: 2011 Jun 16 2200 UTC
0-24 hr
24-48 hr
15 %
10 %
05 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
20 %
20 %
10 %
10 %
10 %
10 %
Thursday, Jun. 16, 2011
What's up in space

Metallic photos of the sun by renowned photographer Greg Piepol bring together the best of art and science. Buy one or a whole set. They make a stellar gift.

Metallic pictures of the Sun

CHANCE OF FLARES: The magnetic field of sunspot 1236 harbors energy for M-class solar flares. NOAA forecasters estimate a 25% chance of such an eruption during the next 24 hrs. Solar flare alerts: text, voice.

LUNAR ECLIPSE: On Wednesday night, June 15th, sky watchers in Africa, Asia, South America, Australia and Europe witnessed the longest lunar eclipse in nearly 11 years. Only North America was excluded as Earth's shadow engulfed the full Moon for a whopping 100 minutes.

In the countryside near Szubin, Poland, clouds and fog combined with the amber light of the eclipse to produce this eerie scene:

"The view of the Moon was amazing and fantastic," says photographer Marek Nikodem.

NEW: June 15th Lunar Eclipse Gallery

more images: from Amir H. Abolfath of Firuzkuh, Tehran, Iran; from Iakovos Marios Strikis of Athens, Greece; from Moulley Charaf Chabou of Setif, Algeria; from Monika Landy-Gyebnar of Veszprem, Hungary; from Cadu Rolim of Mole Beach, Florianópolis, SC, Brazil; from Tony Surma-Hawes of Brisbane, Queensland, Australia; from Rafael Schmall of Veszprem, Hungary; from Mohammad Shirani of Cyberjaya ,Malaysia; from Johan Pauly of Belgium; from Andrej Gustin of Ljubljana, Slovenia; from Jarle Aasland of Stavanger, Norway; from Albert Kong of Hsinchu, Taiwan; from Liz Gleeson of Townsville, North Queensland, Australia

CORONAL MASS EJECTION: On June 14th around 0810 UT, a magnetic filament near the sun's eastern limb became unstable and erupted. The resulting blast hurled a bright and massive CME into space:

The expanding cloud was observed by 3 spacecraft: STEREO-A, STEREO-B and SOHO. Researchers at the Goddard Space Flight Center's Space Weather Lab assembled data from the fleet to create a 3-dimensional model of the expanding cloud: movie. According to their analysis, the cloud blew away from the sun at a speed of 830 km/s and it could deliver a glancing blow to Earth's magnetic field on June 17th at 10:50 UT (plus minus 7 hours). The impact is not expected to provoke strong geomagnetic storming. Nevertheless, high-latitude sky watchers should be alert for auroras when the CME arrives. Aurora alerts: text, voice

June 2011 Aurora Gallery
[Aurora alerts: text, voice] [previous Junes: 2010, 2008, 2001]

Midnight Solar Eclipse Gallery
[NASA: A Rare Eclipse of the Midnight Sun]

  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 16, 2011 there were 1224 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2002 JB9
Jun 11
71.5 LD
3.1 km
2001 VH75
Jun 12
42.2 LD
1.1 km
2011 LT17
Jun 15
4.6 LD
190 m
2004 LO2
Jun 15
9.9 LD
48 m
2011 GA55
Jul 6
64.1 LD
1.0 km
2011 EZ78
Jul 10
37.3 LD
1.6 km
2003 YS117
Jul 14
73.9 LD
1.0 km
2007 DD
Jul 23
9.3 LD
31 m
2009 AV
Aug 22
49.7 LD
1.1 km
2003 QC10
Sep 18
50 LD
1.2 km
2004 SV55
Sep 19
67.5 LD
1.2 km
2007 TD
Sep 23
3.8 LD
58 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 web 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 Dynamics Observatory
  Researchers call it a "Hubble for the sun." SDO is the most advanced solar observatory ever.
  3D views of the sun from NASA's Solar and Terrestrial Relations Observatory
Solar and Heliospheric Observatory
  Realtime and archival images of the Sun from SOHO.
Daily Sunspot Summaries
  from the NOAA Space Environment Center
  the underlying science of space weather
Science Central
Conquest Graphics
  for out-of-this-world printing and graphics
Trade Show Displays
  more links...
©2010 All rights reserved. This site is penned daily by Dr. Tony Phillips.
©2019 All rights reserved.