You are viewing the page for Aug. 3, 2019
  Select another date:
<<back forward>>
SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 353.7 km/sec
density: 3.2 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 2349 UT
X-ray Solar Flares
6-hr max: A7
1950 UT Aug03
24-hr: A7
1143 UT Aug03
explanation | more data
Updated: Today at: 2300 UT
Daily Sun: 03 Aug 19
The sun is blank--no sunspots. Credit: SDO/HMI

Sunspot number: 0
What is the sunspot number?
Updated 03 Aug 2019

Spotless Days
Current Stretch: 11 days
2019 total: 143 days (67%)
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 03 Aug 2019


Thermosphere Climate Index
today: 2.66
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 03 Aug 2019

The Radio Sun
10.7 cm flux: 67 sfu
explanation | more data
Updated 03 Aug 2019

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 1
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 2.8 nT
Bz: -0.7 nT south
more data: ACE, DSCOVR
Updated: Today at 2350 UT
Coronal Holes: 03 Aug 19


Solar wind flowing from this equatorial coronal hole should reach Earth on August 5-6.
Credit: SDO/AIA

Noctilucent Clouds The northern season for noctilucent 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: 07-18-2019 14:55:02
SPACE WEATHER
NOAA Forecasts
Updated at: 2019 Aug 03 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 Aug 03 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
35 %
MINOR
05 %
15 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
10 %
MINOR
30 %
30 %
SEVERE
25 %
55 %
 
Saturday, Aug. 3, 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 estimate a 20% to 25% chance of G1-class geomagnetic storms on Aug. 5th and 6th when a stream of solar wind is expected to hit Earth's magnetic field. The gaseous material is flowing from a large hourglass-shaped hole in the sun's atmosphere. High-latitude sky watchers should be alert for auroras, especially in the southern hemisphere where winter darkness favors visibility. Aurora alerts: SMS Text

THE EERIE CALMING OF EARTH'S MAGNETIC FIELD: Solar Minimum is having a calming effect on Earth's magnetic field. The deepening quiet is shown in these geomagnetic data, taken by Stuart Green of Preston, Lancashire, UK, during each of the past 3 summers:

"I've plotted the changing levels of geomagnetic activity for the months of May, June and July (between the equinoxes) for the years 2017, 2018 and 2019," explains Green. "The trend is clearly downward, with less frequent and intense storms in 2019, as the sun continues deeper into Solar Minimum."

His data show why minor G1-class geomagnetic storms, which would rarely be mentioned during Solar Maximum, are suddenly noteworthy. Any magnetic storm is news at this point in the solar cycle.

NOCTILUCENT CLOUDS IN AUGUST: Noctilucent clouds (NLCs) are an early-summertime phenomenon. Normally, the clouds begin to dim in late July, then fade away completely as August unfolds. It is their seasonal pattern. This year, though, things might be different. Just last night Göran Strand of Östersund, Sweden, witnessed a display of NLCs bright enough to see over the lights of a rock concert:

"On Aug. 3rd during our yearly Storsjöyran music festival, we got some really beautiful noctilucent clouds visible over the city center," says Strand, "It was quite hard to get the exposures balanced in this 3 shot panorama because the lights from the stage kept changing all the time. I think I was the only one watching the clouds instead of the band performing :-)"

2019 has been a very unusual year for noctilucent clouds, with sightings at record-low latitudes as far south as New Mexico and southern California. Why? NASA satellites have detected unusual amounts of water in the mesosphere. The extra moisture crystallized around specks of meteor smoke, creating an abundance of NLCs. If this trend continues, August might be a good month for NLCs contrary to normal seasonal patterns.

Observing tips: Look west 30 to 60 minutes after sunset (or before sunrise) when the sun is just below the horizon. If you see luminous blue-white tendrils spreading across the sky, you may have spotted a noctilucent cloud.

Realtime Noctilucent Cloud Photo Gallery
Free: Spaceweather.com Newsletter

FLY ME TO THE MOONSTONE: Are you looking for a far-out gift? Nothing says "I love you" like a moonstone from the edge of space. On June 12th, the students of Earth to Sky Calculus flew this moonstone wrapped in a sterling silver Celtic love knot 34.1 km (111,877 feet) above Earth's surface:

You can have it for $139.95. The students are selling these pendants to support their cosmic ray ballooning program. Each one comes with a greeting card showing the item in flight and telling the story of its journey to the edge of space. Sales support the Earth to Sky Calculus cosmic ray ballooning program and hands-on STEM research.

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


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 Aug. 3, 2019, the network reported 35 fireballs.
(21 sporadics, 9 Southern delta Aquariids, 5 Perseids)

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 August 3, 2019 there were 1983 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Velocity (km/s)
Diameter (m)
2019 ON3
2019-Jul-29
0.6 LD
14.2
10
2019 NN4
2019-Jul-29
6.6 LD
3.8
26
2019 OP4
2019-Jul-29
1.8 LD
9
13
2019 OX3
2019-Jul-30
2.3 LD
13.3
10
2019 ON
2019-Aug-01
6.8 LD
4.7
33
2019 OJ3
2019-Aug-02
11.4 LD
16.2
61
2006 QQ23
2019-Aug-10
19.4 LD
4.7
339
454094
2019-Aug-12
17 LD
8.2
148
2018 PN22
2019-Aug-17
17.1 LD
2.3
11
2016 PD1
2019-Aug-26
11.4 LD
5.9
65
2002 JR100
2019-Aug-27
19.4 LD
8.4
49
2019 OU1
2019-Aug-28
2.7 LD
13.2
92
2019 OF2
2019-Sep-03
18 LD
10.5
49
2018 DE1
2019-Sep-03
12.7 LD
6.6
28
2019 GT3
2019-Sep-06
19.5 LD
13.6
227
2010 RM82
2019-Sep-13
18.2 LD
14.6
23
2013 CV83
2019-Sep-13
15.7 LD
13.1
62
504800
2019-Sep-14
13.9 LD
14.4
155
467317
2019-Sep-14
13.9 LD
6.4
389
2019 JF1
2019-Sep-16
11.2 LD
4.3
61
2018 FU1
2019-Sep-16
18.4 LD
4.7
16
2017 SL16
2019-Sep-21
7.9 LD
6.5
25
2017 SM21
2019-Sep-21
11.5 LD
9.6
20
2006 QV89
2019-Sep-23
15.9 LD
4.2
31
523934
2019-Sep-24
10.9 LD
22.3
257
2017 KP27
2019-Sep-26
6.2 LD
4.8
25
2018 FK5
2019-Oct-01
13.3 LD
10.5
8
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
Spaceweather.com welcomes these supporters of science communication: RV Sales and CRAS, the Conservatory of Recording Arts and Sciences and Windshield Replacement Phoenix and Breast Augmentation Phoenix and Dentist Chandler, AZ.
   
Look no further to find the best Comox Valley Real Estate listings and homes for sale
   
NASA Near Earth Asteroid Home Page
   
Chicago SEO Expert
   
Search Kelowna Real Estate Listings & Homes for Sale easily.
Find help on all Calgary Homes For Sale and Real Estate Listings. Great source for Edmonton Real Estate Listings & Homes For Sale
   

To find reviews of new online casino sites in the UK try The Casino DB where there are hundreds of online casino reviews complete with bonuses and ratings.

Looking for a new online casino? Try Casimpo the new site dedicated to making online casino simple and easy for all.

  These links help Spaceweather.com stay online. Thank you to our supporters!
  more links...
       
©2018 Spaceweather.com. All rights reserved. This site is penned daily by Dr. Tony Phillips.
©2013 Spaceweather.com. All rights reserved.