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Solar wind
speed: 332.6 km/sec
density: 2.6 protons/cm3
explanation | more data
Updated: Today at 0507 UT
X-ray Solar Flares
6-hr max: C1
0115 UT Mar31
24-hr: C1
0115 UT Mar31
explanation | more data
Updated: Today at: 0500 UT
Daily Sun: 30 Mar 15
The magnetic field of sunspot AR2305 has simplified, and no longer poses a threat for strong flares. Credit: SDO/HMI

Sunspot number: 56
What is the sunspot number?
Updated 30 Mar 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 30 Mar 2015


The Radio Sun
10.7 cm flux: 145 sfu
explanation | more data
Updated 30 Mar 2015

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 6.6 nT
Bz: 2 nT south
explanation | more data
Updated: Today at 0507 UT
Coronal Holes: 30 Mar 15

A stream of solar wind flowing from this southern coronal hole should reach Earth on March 30-31. 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
SPACE WEATHER
NOAA Forecasts
Updated at: 2015 Mar 30 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
15 %
25 %
CLASS X
01 %
05 %
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 Mar 30 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
20 %
25 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
25 %
25 %
SEVERE
30 %
30 %
 
Tuesday, Mar. 31, 2015
What's up in space
 

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

 
Chase the Light Tours

QUIET SUN: The sunspot number is high, but solar activity is low. None of the dark cores peppering the surface of the sun has the type of complex magnetic field that harbors energy for strong flares. NOAA forecasters put the odds of an X-class solar flare today at no more than 1%. Solar flare alerts: text, voice

WEEKEND AURORAS: A fast-moving stream of solar wind expected to hit Earth's magnetic field over the weekend ... did not. Bright auroras appeared anyway. "The the whole sky exploded," reports Truls Tiller, who saw this "big corona" on March 28th while camping outside the village of Skibotn, Norway:

What caused this display? On March 28th, the interplanetary magnetic field (IMF) near Earth tipped south, opening a 'crack' in our planet's magnetosphere. The fast solar wind had not yet arrived. Even so, there was plenty of slow solar wind in the area to flow through the crack and fuel the outburst.

NOAA forecasters believe the tardy stream of solar wind is still coming. When it arrives, possibly on March 30th or 31st, the solar wind speed around Earth will surge from ~300 km/s (slow) to ~700 km/s (fast). The increase could spark even brighter lights than the ones Tiller saw. High-latitude sky watchers should remain alert for auroras as the new week begins. Aurora alerts: text, voice

Realtime Space Weather Photo Gallery

STRESS-TESTING HALOBACTERIA: Astrobiologsts have long wondered if halobacteria, a terrestrial extremophile with a special talent for shielding itself from UV radiation, could survive on the planet Mars. To find the answer, the students of Earth to Sky Calculus have been flying halobacteria onboard balloons to the top of Earth's atmosphere. On March 24, 2015, this test tube full of microbes traveled to an altitude of 110,000 feet:

During the flight, onboard sensors registered temperatures as low as -60 C, air pressures of 1% sea level, and cosmic radiation levels 40 times Earth-normal. Those are conditions akin to the planet Mars. Two and a half hours after they were launched, the bacteria landed in the Death Valley National Park. This means they experienced a 100 C swing in temperature, a 100-fold change in air pressure, and a 40-fold surge of radiation. A recovery team collected the microbes from the park's Nelson Range on March 25th.

The students have already shown that halobacteria can survive trips like this. But can they survive multiple trips? This same test-tube of microbes will fly again on April 1st, and a third time on April 7th--an unprecedented stress-test for this species. Stay tuned for results.

Hey thanks! The students of Earth to Sky Calculus wish to thank Fokke Fernhout for sponsoring the March 24th flight. His donation of $500 paid for the helium and other supplies necessary to get the balloon off the ground. In exchange, the students flew a Fernhout family photo to the edge of space:

Readers, if you would like to help send halobacteria back to the edge of space for additional stress-testing, sponsorship opportunities are available. Please contact Dr. Tony Phillips for details.


Realtime Eclipse Photo Gallery


Realtime Aurora 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 Spaceweather.com.

On Mar. 30, 2015, the network reported 23 fireballs.
(23 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 March 31, 2015 there were 1568 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Size
2015 FC
Mar 26
2.9 LD
20 m
2014 YB35
Mar 27
11.6 LD
715 m
2015 FH37
Mar 27
8.9 LD
46 m
2015 FM118
Mar 28
0.9 LD
8 m
2015 FP
Mar 28
9.6 LD
40 m
2015 FF36
Mar 28
3.5 LD
22 m
2015 FT117
Mar 28
2.8 LD
9 m
2015 FW117
Apr 1
3.6 LD
117 m
2015 FW284
Apr 1
11.5 LD
49 m
2015 CW13
Apr 3
13.5 LD
108 m
2015 FK120
Apr 5
5.8 LD
17 m
2015 FN33
Apr 6
9.8 LD
25 m
2063 Bacchus
Apr 7
76 LD
1.6 km
2005 KA
Apr 12
13 LD
50 m
5381 Sekhmet
May 17
62.8 LD
2.1 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.
STEREO
  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
Heliophysics
  the underlying science of space weather
Space Weather Alerts
   
  more links...
 
 

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