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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 338.3 km/sec
density: 7.5 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 2347 UT
X-ray Solar Flares
6-hr max: A5
1823 UT Jan22
24-hr: A5
0730 UT Jan22
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 22 Jan 19
Sunspot 2733 (provisionally numbered) is a member of old Solar Cycle 24. Credit: SDO/HMI

Sunspot number: 11
What is the sunspot number?
Updated 22 Jan 2019

Spotless Days
Current Stretch: 0 days
2019 total: 14 days (64%)
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 22 Jan 2019


Thermosphere Climate Index
today: 3.18
x1010 W Cold
Max: 49.4
x1010 W Hot (10/1957)
Min: 2.05
x1010 W Cold (02/2009)
explanation | more data
Updated 22 Jan 2019

The Radio Sun
10.7 cm flux: 70 sfu
explanation | more data
Updated 22 Jan 2019

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 2 quiet
24-hr max: Kp= 2
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 5.7 nT
Bz: -5.5 nT south
more data: ACE, DSCOVR
Updated: Today at 2346 UT
Coronal Holes: 22 Jan 19

Solar wind flowing from this coronal hole should hit Earth's magnetic field on Jan. 24th. Credit: SDO/AIA
Noctilucent Clouds The southern season for noctilucent clouds (NLCs) has begun! NASA's AIM spacecraft is detecting electric blue clouds at the edge of space over Antarctica.
Switch view: Europe, USA, Asia, Polar
Updated at:
SPACE WEATHER
NOAA Forecasts
Updated at: 2019 Jan 22 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 Jan 22 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
35 %
40 %
MINOR
20 %
25 %
SEVERE
01 %
05 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
10 %
10 %
MINOR
25 %
25 %
SEVERE
60 %
60 %
 
Tuesday, Jan. 22, 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 STORMS: NOAA forecasters say there is a 60% chance of G1-class geomagnetic storms on Jan. 24th when a stream of solar wind is expected to hit Earth's magnetic field. The gaseous material is flowing ~600 km/s from a hole in the sun's atmosphere. Arctic auroras are likely this Thursday. Aurora Alerts: SMS text, email.

A METEOROID HITS THE MOON DURING LUNAR ECLIPSE: On Jan. 21st at 04:41:43 UT, a meteoroid slammed into the Moon. We know this because many amateur astronomers witnessed or photographed the explosion. Petr Horálek was one of them; he captured the fireball from Boa Vista, one of the islands of Cape Verde:

"As I was sorting through my pictures of the eclipse, I was trying to avoid images with dusty specks or hot pixels," says Horálek. "Upon closer inspection, I realized this was no hot pixel. It was a flash of light on the Moon--and other astronomers had photographed it as well."

At least a dozen reliable still images and videos of the impact have surfaced so far. Analyzing a sharp image taken by Christian Fröschlin of the Netherlands, geologist and amateur astronomer Justin Cowart has estimated the selenographic coordinates of the impact site: 29.47S, 67.77W +/- 4km. This  puts it just to the west of the lunar crater Lagrange H. NASA's Lunar Reconnaissance Orbiter may be able to use such coordinates to target its cameras and photograph the crater.

Meteoroids hit the Moon all the time. Literally. NASA has been observing the impact flashes since 2005. Recently, other groups in Europe have joined the hunt. Flashes are typically observed once every 2 or 3 hours of observing time. Impactors range in size from softballs to boulders, liberating energies equal to tons of TNT when they strike.


Spain's MIDAS survey recorded this video of the Jan 21st lunar meteor strike

The rare thing about this strike is that it was photographed during a full Moon, when lunar glare usually overwhelms the glow of any fireball. During the eclipse, Earth's shadow turned lunar day into almost-night for an hour, allowing the fireball to be seen.

Readers, were you taking pictures of the eclipse around 04:41 UT? Inspect your images! You might have captured an explosion. Submit your images here.

Realtime Eclipse Photo Gallery

FULL MOON VALENTINE'S GIFT: Poets, lovers, and artists have long known this simple truth: Nothing is more romantic than a full Moon. Now you can give the full Moon as a Valentine's Gift--the full Moon space pendant, that is. This one flew to the stratosphere on Dec. 26, 2018, onboard an Earth to Sky Calculus cosmic ray balloon:

You can have it for $119.95. The students are selling these spherical glass pendants to support their cosmic ray ballooning program. Each one comes with a Valentine's card showing the pendant in flight and telling the story of its journey to the edge of space and back again.

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

THE BLUE LUNAR ECLIPSE: Lunar eclipses are supposed to be red, yet when the Moon passed through Earth's ruddy shadow on Jan. 20th, many observers witnessed a different color: turquoise blue. Heiko Ulbricht and Dirk Landrock photographed  the phenomenon from Radebeul, Germany:

"The colors were wonderful--red and blue," says Ulbricht.

The source of the turquoise is ozone. Prof. Richard Keen, an atmospheric scientist from the University of Colorado explains: "During a lunar eclipse, most of the light illuminating the Moon passes through the stratosphere, and is reddened by scattering. However, light passing through the upper stratosphere penetrates the ozone layer, which absorbs red light and actually makes the passing light ray bluer." This can be seen, he says, as a turquoise fringe around the red.

Blue appears during every total eclipse of the Moon. Naked-eye observers often miss it because it is fleeting, best seen only during the opening and closing minutes of totality. Binoculars and telescopes improves visibility. "We used a 14-inch Maksutov-Newton telescope," notes Ulbricht.

The blue eclipse was also seen in Argentina, Arizona, Oklahoma, Illinois, Italy, the Netherlands, and Kansas ... just to name a few.

Realtime Eclipse Photo Gallery


Realtime Space Weather Photo Gallery


Realtime Aurora 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 Jan. 21, 2019, the network reported 10 fireballs.
(10 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 January 22, 2019 there were 1947 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Velocity (km/s)
Diameter (m)
2019 BO
2019-Jan-16
0.2 LD
8.1
9
2019 AU9
2019-Jan-16
7.7 LD
5.1
15
2019 AM10
2019-Jan-16
17.5 LD
3.6
35
2019 AR8
2019-Jan-16
9.7 LD
8.9
27
2019 AC3
2019-Jan-17
10.7 LD
4.4
12
2019 AB5
2019-Jan-19
7.5 LD
6.6
28
2019 AZ8
2019-Jan-20
13.7 LD
10
25
2019 AO8
2019-Jan-20
10.4 LD
11.3
27
2019 AX8
2019-Jan-22
18.1 LD
16.2
38
2019 AS11
2019-Jan-23
7 LD
4.3
16
2019 AH13
2019-Jan-23
19 LD
2.4
22
2019 AJ13
2019-Jan-25
7.6 LD
6
8
2019 AN12
2019-Jan-25
9.2 LD
20.3
29
2019 AG11
2019-Jan-25
8.6 LD
7.5
20
2019 AA10
2019-Jan-26
5.7 LD
10.2
28
2019 AP11
2019-Jan-28
10.2 LD
7.7
31
2019 AN11
2019-Jan-29
12.7 LD
8.1
31
2013 CW32
2019-Jan-29
13.9 LD
16.4
148
2019 AV2
2019-Feb-01
17.6 LD
13
204
2013 RV9
2019-Feb-06
17.9 LD
5.9
68
2017 PV25
2019-Feb-12
7.3 LD
6.1
43
455176
2019-Feb-20
19.2 LD
26.5
269
2016 CO246
2019-Feb-22
15.8 LD
5.5
23
2018 DE1
2019-Feb-27
19.8 LD
6.5
28
2016 FU12
2019-Feb-27
15.4 LD
5.2
15
2015 EG
2019-Mar-04
1.2 LD
9.6
26
2013 EG68
2019-Mar-13
19.3 LD
17
37
2012 VZ19
2019-Mar-13
7.7 LD
8
27
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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