Solar wind
speed: 353.5 km/sec
density: 4.0 protons/cm3
explanation | more data
Updated: Today at 1600 UT
X-ray Solar Flares
6-hr max: A8
1307 UT Nov19
24-hr: A8
1307 UT Nov19
explanation | more data
Updated: Today at: 1600 UT
Daily Sun: 19 Nov 19
The sun is blank--no sunspots. Credit: SDO/HMI

Sunspot number: 0
What is the sunspot number?
Updated 19 Nov 2019

Spotless Days
Current Stretch: 6 days
2019 total: 242 days (75%)
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 19 Nov 2019


Thermosphere Climate Index
today: 3.69
x1010 W Cold
Max: 49.4
x1010 W Hot (10/1957)
Min: 2.05
x1010 W Cold (02/2009)
explanation | more data: gfx, txt
Updated 18
Nov 2019

The Radio Sun
10.7 cm flux: 70 sfu
explanation | more data
Updated 19 Nov 2019

Cosmic Rays Solar minimum is underway. The sun's magnetic field is weak, allowing extra cosmic rays into the solar system. Neutron counts from the University of Oulu's Sodankyla Geophysical Observatory show that cosmic rays reaching Earth in 2019 are near a Space Age peak.

Oulu Neutron Counts

Percentages of the Space Age average:
today: +9.1% High
7-day change: +0.6%
Max: +11.7% Very High
(12/2009)
Min: -32.1% Very Low (06/1991)
explanation | more data
Updated 19 Nov 2019 @ 0300 UT

Since 2015, Earth to Sky cosmic ray balloons launched weekly from California have also detected significant increases in atmospheric radiation. Dose rates reported below are in the stratosphere at approx. 100,000 ft.

California Cosmic Ray Balloons
Monitoring started in March 2015
now: 4.46 uGy/hr High
change since 2015: +18%
Max: 4.79 uGy/hr High
(10/2019)
Min: 3.80 uGy/hr Low (05/2015)
explanation | more data
Updated 16 Nov 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: 2.9 nT
Bz: 1.9 nT north
more data: ACE, DSCOVR
Updated: Today at 1559 UT
Coronal Holes: 19 Nov 19

Solar wind flowing from the indicated coronal hole will reach Earth on Nov. 21.
Credit: SDO/AIA

Noctilucent Clouds The southern hemisphere season for noctilucent clouds began on Nov. 15th--the earliest start in recorded history. Check here for daily images from NASA's AIM spacecraft.
Switch view: Europe, USA, Asia, Polar
Updated at: 11-19-2019 04:55:03 UT
SPACE WEATHER
NOAA Forecasts
Updated at: 2019 Nov 18 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 Nov 18 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
35 %
MINOR
05 %
20 %
SEVERE
01 %
05 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
10 %
MINOR
25 %
25 %
SEVERE
25 %
50 %
 
Tuesday, Nov. 19, 2019
What's up in space
       
 

Solar minimum is here - but even now strangely beautiful auroras are dancing around the poles. Deep inside the Arctic Circle, the expert guides of Aurora Holidays in Utsjoki, Finland, can help you chase them. Book now!

 

CHANCE OF MAGNETIC STORMS: NOAA forecasters say there is a chance of minor G1-class geomagnetic storms on Nov. 21st when a fast moving stream of solar wind hits Earth's magnetic field. The gaseous material is flowing from a ragged hole in the sun's atmosphere. This hole has strobed Earth with solar wind on four previous occasions and each time sparked a storm of G1-class or stronger. Aurora alerts: SMS Text.

A METEOR OUTBURST IS POSSIBLE THIS WEEK: Get ready for a meteor outburst--maybe. On Nov. 21-22, Earth will pass by a stream of dusty debris from an unknown comet. Forecasters Esko Lyytinen (Finnish Fireball Network) and Peter Jenniskens (NASA/Ames) believe this could cause an outburst of alpha Monocerotid meteors. Jenniskens witnessed a previous outburst in 1995:


"This is a composite of alpha Monocerotids detected in low-light video observations by Sirko Molau in Germany during the 1995 outburst," says Jenniskens. "Most of the meteors ranged in magnitude from +2 to +0."

No one knows exactly where alpha Monocerotid meteors come from. The parent comet has never been seen. Based on the dynamics of its debris, it probably circles the sun every 500 years or so. We know the comet exists only because of the narrow trail of dust it left behind long ago. Earth has run into the dust trail at least 4 times, causing bright outbursts of meteors in 1925, 1935, 1985 and 1995.

Lyytinen and Jenniskens recently realized that in 2019 Earth would pass about as close to the debris as it did in 1995--and so they issued this alert. The outburst is expected around 04:50 UT on Nov. 22nd (11:50 p.m. EST on Nov. 21st). Because the debris zone is narrow (only ~50,000 km wide), the outburst could last as little as 15 minutes and probably no more than 40 minutes, producing dozens of meteors during that short time.

People in western Europe may have the best view shortly before sunrise on Nov. 22nd. For them, the shower's radiant in Monoceros (the Unicorn) will be relatively high in the southern sky. Sky watchers in eastern parts of North America can see the show, too, but not as well. As shown in the sky map, above, Monoceros will still be hugging the eastern horizon when the shower peaks over the east coast of Canada and the USA. West coast observers won't be able to see Monoceros at all.

There's no guarantee that anything will happen. Only a handful of alpha Monocerotid outbursts have been observed in the past century, which means researchers are still mapping the debris zone. Earth could hit a extra-dense spot, resulting in an amazing display, or pass through a void, producing nothing.

"We are crossing the dust trail along a different cord than in past returns and this will help understand how the dust is distributed perpendicular to the Earth's path," says Jenniskens. "Whatever happens, we are going to learn something."

Realtime Spaceweather Photo Gallery
Free:
Spaceweather.com Newsletter

NOCTILUCENT CLOUDS ARE FORMING OVER ANTARCTICA: The southern season for noctilucent clouds (NLCs) is underway, according to new observations from NASA's AIM spacecraft. "On Nov. 15th, AIM detected a small cloud over eastern Antarctica," reports Cora Randall of the University of Colorado's Laboratory for Atmospheric and Space Physics. "This is the earliest we have seen NLCs appear since the AIM mission began in 2007." Note the electric-blue puff over Dronning Maud Land in this image taken by AIM's CIPS instrument:


NLCs are Earth's highest clouds. They form around the poles when summertime water vapor billows up into the high atmosphere, crystallizing around specks of meteor smoke at the edge of space. Antarctic NLCs typically appear in mid- to -late November. This year's early apparition on Nov. 15th breaks the earlier mark of Nov. 17th set in 2013 and 2016.

If history is any guide, that little puff of blue is about to expand dramatically. Previous data from AIM spacecraft show that noctilucent clouds are like a great "geophysical light bulb." They turn on in late spring (in this case, austral spring) and reach almost full intensity over a period of no more than 5 to 10 days. A week from now, the entire South Pole could be ringed by electric blue clouds. Stay tuned!

Realtime NLC Photo Gallery
Free:
Spaceweather.com Newsletter

ANNIE JUMP CANNON IN THE STRATOSPHERE: Pioneering astronomer Annie Jump Cannon invented the modern system of stellar classification. To honor her, the US Mint has created a $1 American Innovation coin featuring Cannon's silhouette and a spray of stars. On Nov. 11th, the students of Earth to Sky Calculus flew some to the stratosphere, 111,221 feet above the Sierra Nevada mountains of central California:

You can have a roll of 25 for $149.95. The students are selling the coins to support their cosmic ray ballooning program. Each roll contains 25 one dollar coins with uncirculated finishes. Cannon is shown on one side and the Statue of Liberty on the other. Individual coins make great Christmas stocking stuffers for young scientists--or give the whole roll as a special gift. Your order comes with a greeting card showing the coins in flight.

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


Realtime Aurora 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 Nov. 18, 2019, the network reported 26 fireballs.
(12 sporadics, 11 Leonids, 3 northern Taurids)

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 November 19, 2019 there were 2018 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Velocity (km/s)
Diameter (m)
2019 UH1
2019-Nov-13
9.5 LD
9.1
52
2019 UN12
2019-Nov-13
3.8 LD
28.8
146
2019 VX
2019-Nov-13
4.1 LD
10.8
31
2019 VU5
2019-Nov-14
3.5 LD
22.6
45
2019 UE8
2019-Nov-15
7.7 LD
6.6
26
2019 WD
2019-Nov-15
2.5 LD
8.6
20
2019 VL5
2019-Nov-15
9.3 LD
8.4
25
2019 WC
2019-Nov-17
9.2 LD
7.6
19
2019 UR2
2019-Nov-18
18 LD
13.4
132
2019 UK6
2019-Nov-20
15.4 LD
7.8
64
2019 WF
2019-Nov-20
1.6 LD
11.6
15
2019 WE
2019-Nov-20
3.3 LD
8.5
16
481394
2019-Nov-21
11.3 LD
7.9
372
2019 VK
2019-Nov-21
5.8 LD
7.6
43
2008 EA9
2019-Nov-23
10.5 LD
2.2
10
2019 VF1
2019-Nov-25
13.3 LD
17.2
89
2017 AP4
2019-Dec-03
8.5 LD
7.5
15
2018 XW2
2019-Dec-07
17.4 LD
13
28
2019 VH5
2019-Dec-08
18.1 LD
9.8
70
216258
2019-Dec-20
15.3 LD
11.8
324
2013 XY20
2019-Dec-21
18.4 LD
1.9
28
2017 XQ60
2019-Dec-22
11 LD
15.6
47
310442
2019-Dec-26
19 LD
12.3
372
2019 AE3
2020-Jan-02
4.9 LD
8.2
13
2019 UO
2020-Jan-10
11.8 LD
9.4
377
2011 EP51
2020-Jan-15
19.6 LD
7.1
32
2017 RZ15
2020-Jan-15
12.1 LD
7.4
14
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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