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Solar wind
speed: 318.4 km/sec
density: 9.5 protons/cm3
explanation | more data
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: C1
1851 UT May27
24-hr: C4
1415 UT May27
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 27 May 14
Departing sunspot AR2065 has a 'beta-gamma' magnetic field that harbors energy for M-class solar flares. Credit: SDO/HMI
Sunspot number: 110
What is the sunspot number?
Updated 27 May 2014

Spotless Days
Current Stretch: 0 days
2014 total: 0 days (0%)
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%)

27 May 2014

The Radio Sun
10.7 cm flux: 108 sfu
explanation | more data
Updated 27 May 2014

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 1
explanation | more data
Interplanetary Mag. Field
Btotal: 4.9 nT
Bz: 3.3 nT north
explanation | more data
Updated: Today at 2347 UT
Coronal Holes: 26 May 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: 05-27-2014 11:55:03
NOAA Forecasts
Updated at: 2014 May 27 2200 UTC
0-24 hr
24-48 hr
15 %
10 %
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: 2014 May 27 2200 UTC
0-24 hr
24-48 hr
05 %
15 %
01 %
01 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
20 %
15 %
30 %
05 %
20 %
Tuesday, May. 27, 2014
What's up in space

Listen to radar echoes from satellites and meteors, live on listener-supported Space Weather Radio.

Spaceweather Radio is on the air

QUIET WITH A CHANCE OF FLARES: Solar activity is low. However, departing sunspot AR2065 has a 'beta-gamma' magnetic field that harbors energy for M-class solar flares. If such an explosion does occur, it would be well-connected to Earth. The sun's spiralling magnetic field leads from the sun's western limb, where AR2065 is located, almost directly back to our planet. Solar flare alerts: text, voice

FIRST NOCTILUCENT CLOUDS OF THE SEASON: Data from NASA's AIM spacecraft have shown that noctilucent clouds (NLCs) are like a great "geophysical light bulb." They turn on every year in late spring, reaching almost full intensity over a period of no more than 5 to 10 days. News flash: The switch has been flipped. "The first NLCs of the northern hemisphere season appeared on May 24th," reports Cora Randall, AIM science team member at the University of Colorado. Pale-blue and wispy, they are circled in this image of the Arctic Circle taken by AIM's CIPS instrument just three days ago:

Last year, for reasons that are not fully understood, noctilucent clouds appeared earlier than usual. In 2014, however, "we are having a fairly normal start," says Randall. "Since AIM was launched in 2007, we have seen start dates typically ranging from May 15th to May 27th, with four seasons (like this one) getting underway between May 24th and May 27th."

If this season follows the pattern of earlier seasons, the small wispy patches pictured above will grow into a magnificent ring of electric-blue clouds in 5 to 10 days--that is, by the first week of June. Then the geophysical light bulb will be fully aglow. Stay tuned for sightings.

Observing tips: NLCs favor high latitudes, but they are not confined there. In recent years the clouds have been sighted as far south as Colorado and Virginia. Look west 30 to 60 minutes after sunset when the Sun has dipped 6o to 16o below the horizon. If you see luminous blue-white tendrils spreading across the sky, you may have spotted a noctilucent cloud.

Realtime Space Weather Photo Gallery

THE RADAR CAMELOPARDALIDS: On May 24th, many sky watchers were disappointed when the Camelopardalid meteor shower produced a measley 5 to 10 shooting stars per hour. At least 10 times that number had been expected. In fact, they were there, just invisible to the human eye. "The shower was quite strong as seen by radar, but almost exclusively in underdense echoes - that is, it was rich in faint meteors (i.e., 6th to 7th magnitude)," reports Peter Brown of the University of Western Ontario. This all-sky radar map obtained during the shower's peak by the Canadian Meteor Orbit Radar clearly shows a Camelopardalid 'hot spot' near the north celestial pole:

"CMOR detected about one hundred orbits from the stream, making this comparable to the 2011 Draconids in terms of strength as seen by the radar," says Brown. "[Compared to other minor showers active on May 24th], the May Camelopardalids were at the top of the list -- relatively speaking a major outburst."

If only it had been a major outburst of visible meteors....

Clearly, the debris stream of parent comet 209P/LINEAR did not contain as many large particles as forecasters anticipated. This gave the advantage to the radar. Even so, some beautiful Camelopardalids were seen by the naked eye. Browse the gallery for examples.

Realtime Meteor Photo Gallery

Realtime Aurora Photo Gallery

Realtime Mars Photo Gallery

Realtime Comet 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 May. 27, 2014, the network reported 12 fireballs.
( 12 sporadics)

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 May 27, 2014 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2002 JC
May 24
48.7 LD
1.4 km
2014 KF22
May 28
2.7 LD
22 m
2014 KH39
Jun 3
1.1 LD
28 m
2014 HQ124
Jun 8
3.3 LD
650 m
2011 PU1
Jul 18
7.6 LD
43 m
2002 JN97
Aug 2
61.4 LD
2.0 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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