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Solar wind
speed: 345.9 km/sec
density: 17.6 protons/cm3
explanation | more data
Updated: Today at 2348 UT
X-ray Solar Flares
6-hr max: C1
1701 UT Apr14
24-hr: C2
1548 UT Apr14
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 14 Apr 15
. Sunspot AR2321 has a 'beta-gamma-delta' magnetic field that harbors energy for X-class solar flares. Meanwhile, even more sunspots (circled) are emerging over the sun's northeastern limb. Credit: SDO/HMI

Sunspot number: 68
What is the sunspot number?
Updated 14 Apr 2015

Spotless Days
Current Stretch: 0 days
2015 total: 0 days (0%)

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%)

Updated 14 Apr 2015

The Radio Sun
10.7 cm flux: 141 sfu
explanation | more data
Updated 14 Apr 2015

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 4 unsettled
24-hr max: Kp= 4
explanation | more data
Interplanetary Mag. Field
Btotal: 9.9 nT
Bz: 9.3 nT south
explanation | more data
Updated: Today at 2001 UT
Coronal Holes: 14 Apr 15

Solar wind flowing from this southern coronal hole should reach Earth on April 16. Credit: SDO/AIA.
Noctilucent Clouds The southern season for NLCs has come to an end. The last clouds were observed by NASA's AIM spacecraft on Feb. 20, 2015. Now attention shifts to the northern hemisphere, where the first clouds of 2015 should appear in mid-May.
Switch view: Ross Ice Shelf, Antarctic Penninsula, East Antarctica, Polar
Updated at: 02-28-2015 02:55:03
NOAA Forecasts
Updated at: 2015 Apr 14 2200 UTC
0-24 hr
24-48 hr
55 %
55 %
20 %
20 %
Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at: 2015 Apr 14 2200 UTC
0-24 hr
24-48 hr
35 %
35 %
15 %
15 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
10 %
15 %
30 %
30 %
50 %
45 %
Tuesday, Apr. 14, 2015
What's up in space

Come to Tromsø and share Marianne's passion for rural photography: invites you to experience "Heaven on Earth" with an aurora, fjord, fishing, whale watching, photography or sightseeing tour.

Chase the Light Tours

SPACE WEATHER WORKSHOP: This week, the staff of and the students of Earth to Sky Calculus will be attending NOAA's annual Space Weather Workshop in Boulder, Colorado. On behalf of the group, Dr. Tony Phillips will deliver a talk entitled "Space Weather Ballooning" (April 14th), in which recent radiation measurements of interest to aviation and space tourism will be revealed and discussed. [agenda]

INCREASING CHANCE OF FLARES: More sunspots are emerging over the sun's eastern limb today. Two new active regions, circled below, are following behemoth sunspot group AR2321 as it turns toward Earth. Click on the image to view a 48-hour movie:

AR2321 has an unstable "beta-gamma-delta" magnetic field that harbors energy for strong flares. The new sunspots boost the odds of an eruption even more. NOAA forecasters estimate a 55% chance of M-class flares and a 20% chance of X-flares on April 14th. Solar flare alerts: text, voice

Realtime Space Weather Photo Gallery

VENUS AND THE SEVEN SISTERS: Venus is so bright, it is often mistaken for a landing airplane. The Pleiades, on the other hand, are faint and delicate, often overlooked. As dissimilar as they are, the Goddess of Love and the Seven Sisters look great together. Marek Nikodem sends this picture of the duo from Szubin, Poland:

"It was an amazing view just after sunset on April 12th," says Nikodem. "Admiring Venus and the Pleiades, I remembered the first launch of Space Shuttle Columbia on this very date 34 years ago."

The planet and the star cluster will remain together for just a few more nights. When the sun goes down, step outside and look west. Surrounded by twilight blue, Venus is visible immediately. As the sky fades to black, the Pleiades emerge beside her. It's a nice way to end the day.

Realtime Space Weather Photo Gallery

Realtime Aurora Photo Gallery

Realtime Eclipse 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 Apr. 14, 2015, the network reported 22 fireballs.
(22 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 April 14, 2015 there were potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
2015 GU
Apr 12
0.3 LD
9 m
2005 KA
Apr 12
13 LD
50 m
2015 GE1
Apr 13
3.4 LD
31 m
2015 GL
Apr 13
6 LD
38 m
2015 GB1
Apr 13
6 LD
20 m
2015 GK
Apr 13
2.8 LD
30 m
2015 GA1
Apr 16
2.5 LD
20 m
2015 GY12
Apr 19
13.7 LD
33 m
5381 Sekhmet
May 17
62.8 LD
2.1 km
2005 XL80
Jun 4
38.1 LD
1.0 km
2012 XB112
Jun 11
10.1 LD
2 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
Space Weather Alerts
  more links...
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