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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 483.8 km/sec
density: 6.8 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 2354 UT
X-ray Solar Flares
6-hr max: A3
1741 UT Mar16
24-hr: A4
1653 UT Mar16
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 16 Mar 18
Tiny new sunspot AR2701 is nearly invisible and will likely be gone tomorrow as it quickly fades away. Credit: SDO/HMI

Sunspot number: 11
What is the sunspot number?
Updated 16 Mar 2018

Spotless Days
Current Stretch: 0 days
2018 total: 40 days (54%)
2017 total: 104 days (28%)
2016 total: 32 days (9%)
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 16 Mar 2018


The Radio Sun
10.7 cm flux: 69 sfu
explanation | more data
Updated 16 Mar 2018

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
unsettled
explanation | more data
Interplanetary Mag. Field
Btotal: 10.9 nT
Bz: -7.3 nT south
more data: ACE, DSCOVR
Updated: Today at 2355 UT
Coronal Holes: 16 Mar 18

Earth is entering a stream of solar wind flowing from this wide coronal hole. Credit: SDO/AIA
Noctilucent Clouds Our connection with NASA's AIM spacecraft has been restored! New images from AIM show that the southern season for noctilucent clouds (NLCs) is underway. Come back to this spot every day to see AIM's "daily daisy," which reveals the dance of electric-blue NLCs around the Antarctic Circle..
Switch view: Ross Ice Shelf, Antarctic Peninsula, East Antarctica, Polar
Updated at: 02-07-2018 17:55:05
SPACE WEATHER
NOAA Forecasts
Updated at: 2018 Mar 15 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
01 %
01 %
CLASS X
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: 2018 Mar 15 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
35 %
35 %
MINOR
15 %
15 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
30 %
30 %
SEVERE
40 %
40 %
 
Friday, Mar. 16, 2018
What's up in space
       
 

Lights Over Lapland is excited to announce that we now have TWO aurora webcams covering nearly a 200° view of Abisko National Park in Sweden! Watch the auroras dance live, all season long here.

 

GEOMAGNETIC ACTIVITY: A stream of solar wind is buffeting Earth's magnetic field today, sparking auroras around the Arctic Circle. The gaseous material is flowing from a gash in the sun's atmosphere so wide that Earth may be inside the emerging stream for another 2 to 3 days. NOAA forecasters estimate a 40% chance of polar geomagnetic activity on March 16th and 17th. Free: Aurora Alerts

EQUINOX AURORAS: "Last night was again tremendous in Senja, Norway," reports aurora photographer Adrien Mauduit. "The arrival of the solar wind gave us five consecutive coronas (auroras that appear to rain down from above) including an extremely bright one that started near the southern horizon, then developed northwards until it was directly overhead."

"What a night!" he adds.

The solar wind stream that sparked this display was not particularly fast or strong. What made the auroras so bright? They were boosted by the "Russell-McPherron effect." During weeks around equinoxes, cracks open in Earth's magnetic field allowing even gentle gusts of solar wind to ignite intense Arctic lights. This effect will continue in the nights ahead as the vernal equinox approaches and the solar wind continues to blow. Free: Aurora Alerts

Realtime Aurora Photo Gallery

MEET THE EASTERNAUTS: Easter is coming early this year: April 1, 2018--hence the flight of the Easternauts. To support their cosmic ray ballooning program, the students of Earth to Sky Calculus have launched a payload full of bunnies to the edge of space:

You can have one for $49.95. (Space helmet included!) They make great Easter gifts for young scientists, and all proceeds support STEM education. Each bunny comes with a greeting card showing the Easternaut in flight and telling the story of its journey to the stratosphere and back again.

Far Out Gifts: Earth to Sky Store
All proceeds support hands-on STEM education

MUST-SEE AURORA MOVIE: On March 14th, deep inside the Arctic Circle, photographer Oliver Wright stood outside in the cold waiting for the solar wind to arrive. Suddenly, the sky erupted in a swirling cauldron of color--"possibly the best I've ever seen," says Wright, who has been leading aurora tours for years in Abisko, Sweden. Turn up the volume and listen to the cries of delight in Wright's 3 minute video:

"My fingers got so cold taking this video," he says, "but it was worth it."

Watch the video again and pay special attention to the moments after 1:30. Those dynamic swirls of pink are caused by energetic particles reaching unusually deep into Earth's atmosphere, interacting with nitrogen molecules to produce a pink glow so intense that it sometimes appeared white.

This outburst was caused by a crack forming in Earth's magnetic field. Ambient solar wind (not the high-speed stream Wright was waiting for) poured in to fuel the display. Magnetic cracks occur more frequently than usual during weeks around equinoxes, which make this a great time of year for Arctic lights. Free: Aurora Alerts

Realtime Space Weather 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. 16, 2018, the network reported 9 fireballs.
(9 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 16, 2018 there were 1882 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Velocity (km/s)
Diameter (m)
2018 DY3
2018-Mar-11
5.3 LD
8
21
2018 EF1
2018-Mar-12
11.5 LD
8.8
50
2018 EX
2018-Mar-12
12.5 LD
2.9
14
2018 EZ2
2018-Mar-14
0.6 LD
9.5
18
2018 EU1
2018-Mar-14
13.5 LD
11.8
16
2018 EU2
2018-Mar-14
10.1 LD
11.3
19
2018 EH
2018-Mar-15
9.2 LD
11
49
2018 EB4
2018-Mar-16
1.5 LD
12.9
30
2018 ET1
2018-Mar-18
4.4 LD
6
19
2018 EC1
2018-Mar-18
12.6 LD
8.7
21
2018 EV1
2018-Mar-22
7.7 LD
11.2
29
2018 DH1
2018-Mar-27
9.2 LD
14.4
224
2016 SR2
2018-Mar-28
18.7 LD
7.3
20
2010 GD35
2018-Mar-31
15.5 LD
11.6
45
2018 EM4
2018-Apr-01
6.2 LD
6.2
29
2004 FG29
2018-Apr-02
4 LD
14.9
22
2018 ER1
2018-Apr-02
15.6 LD
4
27
2018 EB
2018-Apr-04
10.4 LD
15.1
164
363599
2018-Apr-12
19.3 LD
24.5
224
2014 UR
2018-Apr-14
9.3 LD
4.4
17
2016 JP
2018-Apr-20
12 LD
12.7
214
2012 XL16
2018-Apr-23
15.8 LD
6.1
28
2013 US3
2018-Apr-29
10.1 LD
7.7
214
2002 JR100
2018-Apr-29
10.8 LD
7.7
49
1999 FN19
2018-May-07
9.7 LD
5.7
118
2016 JQ5
2018-May-08
6.3 LD
10.4
9
388945
2018-May-09
6.5 LD
9
295
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.
  Cosmic Rays in the Atmosphere

Readers, thank you for your patience while we continue to develop this new section of Spaceweather.com. We've been working to streamline our data reduction, allowing us to post results from balloon flights much more rapidly, and we have developed a new data product, shown here:

This plot displays radiation measurements not only in the stratosphere, but also at aviation altitudes. Dose rates are expessed as multiples of sea level. For instance, we see that boarding a plane that flies at 25,000 feet exposes passengers to dose rates ~10x higher than sea level. At 40,000 feet, the multiplier is closer to 50x. These measurements are made by our usual cosmic ray payload as it passes through aviation altitudes en route to the stratosphere over California.

What is this all about? Approximately once a week, Spaceweather.com and the students of Earth to Sky Calculus fly space weather balloons to the stratosphere over California. These balloons are equipped with radiation sensors that detect cosmic rays, a surprisingly "down to Earth" form of space weather. Cosmic rays can seed clouds, trigger lightning, and penetrate commercial airplanes. Furthermore, there are studies ( #1, #2, #3, #4) linking cosmic rays with cardiac arrhythmias and sudden cardiac death in the general population. Our latest measurements show that cosmic rays are intensifying, with an increase of more than 13% since 2015:


Why are cosmic rays intensifying? The main reason is the sun. Solar storm clouds such as coronal mass ejections (CMEs) sweep aside cosmic rays when they pass by Earth. During Solar Maximum, CMEs are abundant and cosmic rays are held at bay. Now, however, the solar cycle is swinging toward Solar Minimum, allowing cosmic rays to return. Another reason could be the weakening of Earth's magnetic field, which helps protect us from deep-space radiation.

The radiation sensors onboard our helium balloons detect X-rays and gamma-rays in the energy range 10 keV to 20 MeV. These energies span the range of medical X-ray machines and airport security scanners.

The data points in the graph above correspond to the peak of the Reneger-Pfotzer maximum, which lies about 67,000 feet above central California. When cosmic rays crash into Earth's atmosphere, they produce a spray of secondary particles that is most intense at the entrance to the stratosphere. Physicists Eric Reneger and Georg Pfotzer discovered the maximum using balloons in the 1930s and it is what we are measuring today.

  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
NOAA 27-Day Space Weather Forecasts
  fun to read, but should be taken with a grain of salt! Forecasts looking ahead more than a few days are often wrong.
Aurora 30 min forecast
  from the NOAA Space Environment Center
Heliophysics
  the underlying science of space weather
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