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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 326.8 km/sec
density: 6.8 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 2353 UT
X-ray Solar Flares
6-hr max: A7
1246 UT Jun17
24-hr: A7
1246 UT Jun17
explanation | more data
Updated: Today at: 1800 UT
Daily Sun: 17 Jun 19
The sun is blank--no sunspots. Credit: SDO/HMI

Sunspot number: 0
What is the sunspot number?
Updated 17 Jun 2019

Spotless Days
Current Stretch: 29 days
2019 total: 103 days (61%)
2018 total: 221 days (61%)
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%)
2008 total: 268 days (73%)
2007 total: 152 days (42%)
2006 total: 70 days (19%)

Updated 17 Jun 2019


Thermosphere Climate Index
today: 3.54
x1010 W Cold
Max: 49.4
x1010 W Hot (10/1957)
Min: 2.05
x1010 W Cold (02/2009)
explanation | more data
Updated 17 Jun 2019

The Radio Sun
10.7 cm flux: 66 sfu
explanation | more data
Updated 17 Jun 2019

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 0 quiet
24-hr max: Kp= 1
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 5.9 nT
Bz: 4.8 nT north
more data: ACE, DSCOVR
Updated: Today at 2353 UT
Coronal Holes: 17 Jun 19


Solar wind flowing from this coronal hole could buffet Earth's magnetic field on June 18-19.
Credit: SDO/AIA

Noctilucent Clouds The northern season for noctilicent clouds is underway. Monitor the daily images from NASA's AIM spacecraft to see how the clouds spread around the Arctic Circle as northern summer unfolds.
Switch view: Europe, USA, Asia, Polar
Updated at: 06-17-2019 14:55:03
SPACE WEATHER
NOAA Forecasts
Updated at: 2019 Jun 17 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: 2019 Jun 17 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
30 %
25 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
20 %
MINOR
30 %
30 %
SEVERE
30 %
25 %
 
Monday, Jun. 17, 2019
What's up in space
       
 

Special Offer: SAVE 600nok per person. Book a combination aurora borealis chase and scenic day tour during the months of September, October or November 2019 for the special price of 1800 kr. Check Marianne's webpage for details!

 

LOW LATITUDE NOCTILUCENT CLOUDS: If you've ever wanted to see a cloud of frosted meteor smoke, now is the time to look. 2019 is shaping up to be the best year for noctilucent clouds (NLCs) ... maybe ever. Last week NLCs were sighted in the USA as far south as Los Angeles CA and Albuquerque NM, shattering old records for low-latitude sightings. Get the full story here.

RED SPRITES AT THE EDGE OF SPACE: We all know what comes out of the bottom of thunderclouds: lightning. But what comes out of the top? Red sprites. High above Earth on May 10th, astronauts onboard the International Space Station watched a cluster of the red forms explode from the top of a powerful thunderstorm located between Los Angeles and Las Vegas:


Spaceweather.com reader Frankie Lucena of Cabo Rojo, Puerto Rico, noticed the sprites in a time lapse video of lightning NASA released last week. "The space station was over California and traveling northeast when they took the picture," notes Lucena.

The photo shows how high sprites can go, reaching all the way from the thunderstorm to a layer of green airglow 100 km above Earth's surface. This means sprites touch the edge of space, alongside auroras, meteors and noctilucent clouds. They are a true space weather phenomenon.

Solar Minimum may be boosting sprites. During this phase of the solar cycle, cosmic rays from deep space penetrate Earth's atmosphere more than usual--a result of the sun's weakening magnetic field. Some researchers believe that cosmic rays may provide the ionizing "spark" that triggers many sprites. If so, stay tuned for more as Solar Minimum deepens.

Realtime Sprite Photo Gallery
Free:
Spaceweather.com Newsletter

APOLLO 11 PROOF SILVER DOLLAR: To celebrate the 50th anniversary of the Apollo 11 Moon landing, the United States Mint has created a commemorative 2019 Proof Silver Dollar. We decided to celebrate even more by flying the coins to the edge of space. On June 8th, the students of Earth to Sky Calculus launched this 99.9% silver dollar 111,222 feet above Earth's surface:

You can have it for $179.95. The students are selling the coins to support their cosmic ray ballooning program. The silver dollar is curved and reproduces the helmet of astronaut Buzz Aldrin. Reflected in Buzz's visor are Neil Armstrong, the United States flag, and the lunar lander. The opposite side of the coin shows Neil's first footprint on the Moon. Each of these coins comes with a greeting card showing the item in flight and a certificate of authenticity.

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

Realtime Noctilucent Cloud Photo Gallery
Free:
Spaceweather.com Newsletter


Realtime Aurora Photo Gallery
Free:
Spaceweather.com Newsletter


Realtime Space Weather Photo Gallery
Free: Spaceweather.com Newsletter



  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 Jun. 17, 2019, 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 June 17, 2019 there were 1983 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Velocity (km/s)
Diameter (m)
2019 LB
2019-Jun-12
9.1 LD
6
33
2019 LL1
2019-Jun-14
5.6 LD
8.9
15
2013 YA14
2019-Jun-14
14.7 LD
11.1
65
2019 KJ
2019-Jun-14
12.6 LD
8.1
68
2019 LQ4
2019-Jun-15
12.8 LD
11.4
39
2019 LU
2019-Jun-16
4.2 LD
8
34
2019 LR
2019-Jun-16
18.3 LD
15
34
2019 LU4
2019-Jun-18
2 LD
8.1
18
2019 LA5
2019-Jun-18
18.3 LD
7.7
29
2019 LC1
2019-Jun-19
19.2 LD
9.9
26
2019 LB2
2019-Jun-20
6.5 LD
3.4
15
2019 LM1
2019-Jun-23
9.8 LD
8.7
26
2019 LC5
2019-Jun-23
13.6 LD
11.1
42
441987
2019-Jun-24
7.7 LD
12.6
178
2008 KV2
2019-Jun-27
17.8 LD
11.4
195
2016 NN15
2019-Jun-28
9.6 LD
8.4
16
2019 LR4
2019-Jun-29
11.3 LD
8.3
31
2019 LV1
2019-Jun-29
5.2 LD
6.2
26
2015 XC352
2019-Jul-01
11.9 LD
4.1
26
2016 OF
2019-Jul-07
12.8 LD
8.5
85
2016 NO56
2019-Jul-07
3.4 LD
12.2
26
2019 KD3
2019-Jul-12
15.5 LD
8
89
2016 NJ33
2019-Jul-12
15 LD
4.5
32
2015 HM10
2019-Jul-24
12.2 LD
9.5
68
2010 PK9
2019-Jul-26
8.2 LD
16.5
155
2006 QQ23
2019-Aug-10
19.4 LD
4.7
339
454094
2019-Aug-12
17 LD
8.2
148
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

SOMETHING NEW! We have developed a new predictive model of aviation radiation. It's called E-RAD--short for Empirical RADiation model. We are constantly flying radiation sensors onboard airplanes over the US and and around the world, so far collecting more than 22,000 gps-tagged radiation measurements. Using this unique dataset, we can predict the dosage on any flight over the USA with an error no worse than 15%.

E-RAD lets us do something new: Every day we monitor approximately 1400 flights criss-crossing the 10 busiest routes in the continental USA. Typically, this includes more than 80,000 passengers per day. E-RAD calculates the radiation exposure for every single flight.

The Hot Flights Table is a daily summary of these calculations. It shows the 5 charter flights with the highest dose rates; the 5 commercial flights with the highest dose rates; 5 commercial flights with near-average dose rates; and the 5 commercial flights with the lowest dose rates. Passengers typically experience dose rates that are 20 to 70 times higher than natural radiation at sea level.

To measure radiation on airplanes, we use the same sensors we fly to the stratosphere onboard Earth to Sky Calculus cosmic ray balloons: neutron bubble chambers and X-ray/gamma-ray Geiger tubes sensitive to energies between 10 keV and 20 MeV. These energies span the range of medical X-ray machines and airport security scanners.

Column definitions: (1) The flight number; (2) The maximum dose rate during the flight, expressed in units of natural radiation at sea level; (3) The maximum altitude of the plane in feet above sea level; (4) Departure city; (5) Arrival city; (6) Duration of the flight.

SPACE WEATHER BALLOON DATA: 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 18% since 2015:

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.

En route to the stratosphere, our sensors also pass through aviation altitudes:

In this plot, 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.

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.

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.

  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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