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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 303.5 km/sec
density: 14.2 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: A5
2033 UT May13
24-hr: A5
1302 UT May13
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 13 May 17
The sun is blank--no sunspots. Credit: SDO/HMI

Sunspot number: 0
What is the sunspot number?
Updated 13 May 2017

Spotless Days
Current Stretch: 4 days
2017 total: 34 days (26%)
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 13 May 2017


The Radio Sun
10.7 cm flux: 69 sfu
explanation | more data
Updated 13 May 2017

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: 3.7 nT
Bz: 3.0 nT north
more data: ACE, DSCOVR
Updated: Today at 2347 UT
Coronal Holes: 13 May 17

Solar wind flowing from this coronal hole should reach Earth on May 15-16. Credit: NASA/SDO.
Noctilucent Clouds The southern season for noctilucent clouds began on Nov. 17, 2016. Come back to this spot every day to see the "daily daisy" from NASA's AIM spacecraft, which is monitoring the dance of electric-blue around the Antarctic Circle.
Switch view: Ross Ice Shelf, Antarctic Peninsula, East Antarctica, Polar
Updated at: 02-24-2017 17:55:02
SPACE WEATHER
NOAA Forecasts
Updated at: 2017 May 13 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: 2017 May 13 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
05 %
20 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
15 %
20 %
SEVERE
15 %
10 %
 
Saturday, May. 13, 2017
What's up in space
       
 

Lights Over lapland is excited to announce that Autumn Aurora Adventures are available for immediate booking! Reserve your adventure of a lifetime in Abisko National Park, Sweden today!

 

SUNSPOT COUNTS ARE PLUMMETING: Today marks the 4th day in a row and the 34th day in 2017 that the sun has been blank--no sunspots. This exceeds the total number of spotless days in all of 2016 (32). The accelerating pace of spotlessness is a sign that Solar Minimum is approaching. Forecasters expect the sunspot cycle, which swings like a pendulum between high and low sunspot number every ~11 years, to reach its nadir in 2019-2020. Stay tuned for more blank suns. Free: Aurora Alerts

COSMIC RAYS ARE INTENSIFYING: Many people think Solar Minimum is boring. Wrong. During the nadir of the sunspot cycle, the entire heliosphere changes its personality with many consequences for the space around our planet. One of the most important changes involves cosmic rays--high-energy radiation reaching Earth from deep space. As sunspot numbers decline, cosmic rays intensify.

Is this actually happening? The answer is "yes." Spaceweather.com and the students of Earth to Sky Calculus have been monitoring radiation levels in the stratosphere with frequent high-altitude balloon flights over California. Here are the latest results, current as of May 6, 2017:

The data show cosmic ray levels intensifying with an approximately 13% increase since March 2015.

Cosmic rays are high-energy photons and subatomic particles accelerated in our direction by distant supernovas and other violent events in the Milky Way. Usually, cosmic rays are held at bay by the sun's magnetic field, which envelops and protects all the planets in the Solar System. But the sun's magnetic shield is weakening in 2017 as the solar cycle shifts from Solar Maximum to Solar Minimum. More and more cosmic rays are therefore reaching our planet.

How does this affect us? Cosmic rays penetrate commercial airlines, dosing passengers and flight crews enough that pilots are classified as occupational radiation workers. Some research shows that cosmic rays can seed clouds and trigger lightning, potentially altering weather and climate. Furthermore, there are studies ( #1, #2, #3, #4) linking cosmic rays with cardiac arrhythmias in the general population.

The sensors we send to the stratosphere measure X-rays and gamma-rays, which are produced by the crash of primary cosmic rays into Earth's atmosphere. The energy range of the sensors, 10 keV to 20 MeV, is similar to that of medical X-ray machines and airport security scanners.

NOTE: This increase is not happening ONLY over California. All parts of the world will be experiencing elevated levels of cosmic rays. The amount varies from place to place depending on the uneven protection afforded by our own planet's magnetic field. In the week ahead we will share new data from intercontinental balloon launches tracing the global response to this phenomenon.

Realtime Space Weather Photo Gallery

A CORONAL HOLE TURNS TOWARD EARTH: A hole in the sun's atmosphere has opened, and it is directly facing Earth. NASA's Solar Dynamics Observatory photographed the structure on May 13th:

This is a coronal hole (CH)--a region where the sun's magnetic field opens up and allows solar wind to escape. The gaseous stream emerging from this hole is expected to reach Earth during the late hours of May 15th, possibly causing mild geomagnetic storms around the poles when it arrives. High-latitude sky watchers should be alert for auroras, especially in the southern hemisphere where deepening autumn darkness favors visibility. Free: Aurora Alerts

Realtime Aurora Photo Gallery

THIS PENDANT HAS TOUCHED SPACE: The radiation monitoring program of Earth to Sky Calculus receives no support from corporate sponsors or government grants. Instead, we are crowd-funded. Or, to be more precise, bling- funded:

To raise money for more cosmic ray balloon flights, on May 6th the students launched a payload of these Northern Lights pendants to the top of Earth's atmosphere. You can have one for $79.95. Each piece of space jewelry comes with a greeting card showing the item in flight and telling the story of its journey to the stratosphere and back. They make great birthday and Mother's Day gifts.

More far-out gifts may be found in the Earth to Sky Store. All proceeds support atmospheric radiation monitoring and hands-on STEM education.


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 May. 13, 2017, the network reported 1 fireballs.
(1 sporadic)

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 13, 2017 there were 1801 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Velocity (km/s)
Diameter (m)
2017 HX4
2017-May-08
3.7 LD
11.9
19
2017 JV1
2017-May-08
2.3 LD
11.3
21
2017 JY1
2017-May-09
8.9 LD
8.1
32
2017 HZ49
2017-May-09
15 LD
5.4
29
2017 HP3
2017-May-10
19.6 LD
17.4
179
2017 JX1
2017-May-11
3.7 LD
8
22
2017 HU49
2017-May-11
5.6 LD
1.8
19
2017 JA2
2017-May-12
2.6 LD
9.6
39
2017 JR1
2017-May-13
15.8 LD
10
40
2017 JM2
2017-May-15
5.1 LD
14.7
51
2012 EC
2017-May-16
19.5 LD
4.5
74
2017 CS
2017-May-29
8 LD
9.1
468
418094
2017-Jun-01
8 LD
23.2
490
2017 HV4
2017-Jun-10
19.5 LD
3.9
52
2010 VB1
2017-Jun-16
10.3 LD
8.3
81
471984
2017-Jun-18
19.1 LD
7.7
102
441987
2017-Jun-24
7.9 LD
12.7
178
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
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NOAA 27-Day Space Weather Forecasts
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Aurora 30 min forecast
  from the NOAA Space Environment Center
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  the underlying science of space weather
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