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You entered an invalid date. This is yesterday's edition. -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids Internet Shopping Sites high quality binoculars excellent weather stations all-metal reflector telescopes rotatable microscopes
Solar wind
speed: 427.1 km/sec
density: 2.2 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: C9
1815 UT Oct22
24-hr: X1
1428 UT Oct22
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 22 Oct 14
Huge sunspot AR2192 poses a continued threat for X-class solar flares. Credit: SDO/HMI
Sunspot number: 120
What is the sunspot number?
Updated 22 Oct 2014

Spotless Days
Current Stretch: 0 days
2014 total: 1 day (<1%)
2013 total: 0 days (0%)
2012 total: 0 days (0%)
2011 total: 2 days (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)

Update 22 Oct

The Radio Sun
10.7 cm flux: 199 sfu
explanation | more data
Updated 22 Oct 2014

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 3 quiet
24-hr max: Kp= 4
explanation | more data
Interplanetary Mag. Field
Btotal: 4.2 nT
Bz: 0.3 nT north
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 22 Oct 14
There are no large coronal holes on the Earthside of the sun. . Credit: SDO/AIA. posts daily satellite images of noctilucent clouds (NLCs), which hover over Earth's poles at the edge of space. The data come from NASA's AIM spacecraft. The north polar "daisy" pictured below is a composite of near-realtime images from AIM assembled by researchers at the University of Colorado's Laboratory for Atmospheric and Space Physics (LASP).
Noctilucent Clouds
Switch view: Europe, USA, Asia, Polar
Updated at: 09-02-2014 12:55:12
NOAA Forecasts
Updated at: 2014 Oct 22 2200 UTC
0-24 hr
24-48 hr
95 %
95 %
55 %
55 %
Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at: 2014 Oct 22 2200 UTC
0-24 hr
24-48 hr
25 %
30 %
10 %
10 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
30 %
35 %
40 %
40 %
Wednesday, Oct. 22, 2014
What's up in space

On October 23rd there will be a partial eclipse of the Sun. Got clouds? No problem. The event will be broadcast live on the web by the Coca-Cola Science Center.

Solar Eclipse Live

SUNSET SOLAR ECLIPSE: On Thursday, Oct. 23rd, the Moon will pass in front of the sun, off center, producing a partial solar eclipse visible from almost all of North America. This animated visibility map shows when to look. The event will be particularly beautiful in the Central and Eastern time zones where maximum eclipse occurs at sunset. Science@NASA has the full story.

LOTS OF SOLAR FLARES: Solar activity is high. During the past 48 hours, monster sunspot AR2192 has produced a series of seven M-class solar flares of increasing intensity. The eruptions crossed the threshold into X-territory with an X1-class flare on Oct. 22nd. NASA's Solar Dynamics Observatory recorded a powerful flash of extreme UV radiation in the sunspot's magnetic canopy at 14:30 UT:

Remarkably, not one of the explosions so far has hurled a significant CME toward Earth. The primary effect of the flares has been to ionize Earth's upper atmosphere, causing a series of short-lived HF radio communications blackouts. Such blackouts may be noticed by amateur radio operators, aviators, and mariners.

Earth-effects could increase in the days ahead. AR2192 has an unstable 'beta-gamma-delta' magnetic field that harbors energy for powerful explosions, and the active region is turning toward Earth. NOAA forecasters estimate at 65% chance of M-class flares and a 20% chance of X-flares during the next 24 hours. Solar flare alerts: text, voice

AR2192 is shaping up to be the biggest sunspot in many years. Its area is now approaching that of AR0486, the last great sunspot of the previous solar cycle, which covered 2610 millionths of the solar disc on Oct. 30, 2003. As of 0h UT today AR 2192 is 2410 millionths. (Thanks to Geoff Chester of the US Naval Observatory for this comparison.)

Because the sunspot is so large--now about as wide as the planet Jupiter--people are beginning to notice it at sunset when the sun is dimmed by clouds or haze. Pilot Brian Whittaker took this picture on Oct. 21st while flying 36,000 ft over Resolute, Nunavut, Canada:

"I was impressed to photograph the giant sunspot as the sun set over Arctic Canada," says Whittaker. "Actually, the sun was temporarily rising because of our great relative speed over the lines of longitude at N75 degrees! Note the green upper rim."

Photographers beware: Do not look at the sun through unfiltered optics. Even when dimmed by clouds or haze, sunlight amplified by camera lenses can cause serious eye damage. If you decide to photograph the low-hanging sun, use your camera's LCD screen for viewfinding. Better yet, buy a solar telescope.

Realtime Space Weather Photo Gallery

Realtime Aurora Photo Gallery

Realtime Comet Photo Gallery

Realtime Eclipse Photo Gallery

  All Sky Fireball Network

Every night, a network of NASA all-sky cameras scans the skies above the United States for meteoritic fireballs. Automated software maintained by NASA's Meteoroid Environment Office calculates their orbits, velocity, penetration depth in Earth's atmosphere and many other characteristics. Daily results are presented here on

On Oct. 22, 2014, the network reported 60 fireballs.
(26 sporadics, 23 Orionids, 4 Leonis Minorids, 3 Southern Taurids, 2 chi Taurids, 1 epsilon Geminid, 1 lambda Draconid)

In this diagram of the inner solar system, all of the fireball orbits intersect at a single point--Earth. The orbits are color-coded by velocity, from slow (red) to fast (blue). [Larger image] [movies]

  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 October 22, 2014 there were 1508 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2014 TV
Oct 18
4.5 LD
60 m
2014 UR
Oct 18
2.9 LD
21 m
2014 TT35
Oct 22
6.9 LD
27 m
2014 TP57
Oct 22
8.2 LD
23 m
2014 SC324
Oct 24
1.5 LD
65 m
2003 UC20
Oct 31
52.4 LD
1.0 km
2004 JN13
Nov 18
52.4 LD
4.1 km
1998 SS49
Nov 18
73.9 LD
3.1 km
2005 UH3
Nov 22
44.4 LD
1.3 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 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
Space Weather Alerts
  more links...
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