Solar wind
speed: 327.5 km/sec
density: 16.82 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1211 UT
X-ray Solar Flares
6-hr max: C5
2116 UT Jun10
24-hr: C5
2116 UT Jun10
explanation | more data
Updated: Today at: 0015 UT
Daily Sun: 10 Jun 23
Expand: labels | no labels | Carrington
Sunspot AR3327 has a 'beta-gamma' magnetic field that harbors energy for M-class solar flares. Credit: SDO/HMI

Sunspot number: 152
What is the sunspot number?
Updated 10 Jun 2023

Spotless Days
Current Stretch: 0 days
2023 total: 0 days (0%)
2022 total: 1 day (<1%)
2021 total: 64 days (18%)
2020 total: 208 days (57%)
2019 total: 281 days (77%)
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 10 Jun 2023

Thermosphere Climate Index
today: 20.32x1010 W Warm
Max: 49.4
x1010 W Hot (10/1957)
Min: 2.05
x1010 W Cold (02/2009)
explanation | more data: gfx, txt
Updated 10 Jun 2023

The Radio Sun
10.7 cm flux: 164 sfu
explanation | more data
Updated 10 Jun 2023

Cosmic Rays Solar Cycle 25 is intensifying, and this is reflected in the number of cosmic rays entering Earth's atmosphere. Neutron counts from the University of Oulu's Sodankyla Geophysical Observatory show that cosmic rays reaching Earth are slowly declining--a result of the yin-yang relationship between the solar cycle and cosmic rays.

Oulu Neutron Counts

Percentages of the Space Age average:
today: -0.1% Below Average
48-hr change: +0.8%
Max: +11.7% Very High
Min: -32.1% Very Low (06/1991)
explanation | more data
Updated 10 Jun 2023 @ 1700 UT

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 1.33 quiet
24-hr max: Kp= 2.00
explanation | more data
Interplanetary Mag. Field
Btotal: 6.12 nT
Bz: 2.45 nT north
more data: ACE, DSCOVR
Updated: Today at 1212 UT
Coronal Holes: 10 Jun 23

There are no significant equatorial coronal holes on the Earthside of the sun..
Credit: SDO/AIA

Noctilucent Clouds
Bad news: NASA's AIM spacecraft, which monitors noctilucent clouds, may be dead due to problems with an onboard battery. Mission controllers have not yet given up all hope, so stay tuned.
Switch view:Ross Ice Shelf, Antarctic Peninsula, East Antarctica, Polar
Updated Jun10
NOAA Forecasts
Updated at: 2023 Jun 10 2200 UTC
0-24 hr
24-48 hr
25 %
25 %
05 %
05 %
Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm
Updated at: 2023 Jun 10 2200 UTC
0-24 hr
24-48 hr
20 %
20 %
05 %
05 %
01 %
01 %
High latitudes
0-24 hr
24-48 hr
15 %
15 %
20 %
20 %
20 %
25 %
Sunday, Jun. 11, 2023
What's up in space

Text created by ChatGPT and other Large Language Models is spreading rapidly across the Internet. It's well-written, artificial, frequently inaccurate. If you find a mistake on, rest assured it was made by a real human being. This is an AI Free Zone!


MANY FARSIDE SUNSPOTS: Helioseismic maps of the farside of the sun show multiple large active regions, probably sunspots. This means the sunspot number should remain high as the sun turns on its axis in the weeks ahead. Disappearing Earthside sunspots will be replaced by farside counterparts. Solar flare alerts: SMS Text

M-FLARE FROM AN UNEXPECTED SOURCE: Sunspot AR3331 exploded on June 9th (1711 UT), producing an M2.5-class solar flare. NASA's Solar Dynamics Observatory captured the extreme ultraviolet flash:

A pulse of radiation ionized the top of Earth's atmosphere. This, in turn, caused a minor blackout of shortwave radio transmissions over the Gulf of Mexico: map. Mariners may have noticed loss of signal at frequencies below 15 MHz for as much as 30 minutes after the flare.

Priviously, this sunspot was not thought to pose a threat for strong solar flares. AR3331 may have some tricks up its sleeve as it turns toward Earth this weekend. Solar flare alerts: SMS Text

Realtime Space Weather Photo Gallery
Free: Newsletter

SATURN'S CAT PENDANT: It's a far-out gift for the cat-lover in your life: Saturn's Cat. The sterling silver pendant touched space on April 29, 2023, when it hitched a ride onboard an Earth to Sky Calculus cosmic ray research balloon.

You can have it for $142.95. The students of Earth to Sky Calculus are selling space pendants to support their cosmic ray ballooning program. Each one comes with a greeting card showing the pendant in flight and telling the story of its journey to the stratosphere and back again.

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

Realtime Aurora Photo Gallery
Free: 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

On Jun 10, 2023, 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 June 11, 2023 there were 2335 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Miss Distance
Velocity (km/s)
Diameter (m)
2023 LB
5.9 LD
2023 KW2
11.8 LD
2018 KR
6.7 LD
2023 LC
0.7 LD
2017 UJ2
5.3 LD
2023 LM
16.4 LD
2023 LD
2.5 LD
2023 JB3
14.1 LD
2023 LL
5.5 LD
2023 LA
1.7 LD
8.3 LD
2022 WN4
10.8 LD
2020 DB5
11.3 LD
2023 HL
13.5 LD
2016 LK49
17.4 LD
2023 HF1
12.5 LD
17.4 LD
2008 LG2
10.5 LD
2013 WV44
9.1 LD
2022 MM1
9.5 LD
2020 NC
13.9 LD
2023 HO6
5.3 LD
2019 LH5
14.9 LD
2018 NW
18 LD
2018 UY
7.4 LD
2020 UQ3
3.2 LD
2022 GX2
11.9 LD
2020 OM
8.5 LD
2015 MA54
16.6 LD
2018 BG5
10.7 LD
2020 PP1
17 LD
2021 BD3
14 LD
2016 AW65
16.6 LD
2020 PN1
10.8 LD
14 LD
2004 KG1
18.7 LD
Notes: LD means "Lunar Distance." 1 LD = 384,401 km, the distance between Earth and the Moon. 1 LD also equals 0.00256 AU.
  Cosmic Rays in the Atmosphere

SPACE WEATHER BALLOON DATA: Almost once a week, and the students of Earth to Sky Calculus fly space weather balloons to the stratosphere over California. These balloons are equipped with sensors that detect secondary cosmic rays, a form of radiation from space that can penetrate all the way down to Earth's surface. Our monitoring program has been underway without interruption for 7 years, resulting in a unique dataset of in situ atmospheric measurements.

Latest results (July 2022): Atmospheric radiation is decreasing in 2022. Our latest measurements in July 2022 registered a 6-year low:

What's going on? Ironically, the radiation drop is caused by increasing solar activity. Solar Cycle 25 has roared to life faster than forecasters expected. The sun's strengthening and increasingly tangled magnetic field repels cosmic rays from deep space. In addition, solar coronal mass ejections (CMEs) sweep aside cosmic rays, causing sharp reductions called "Forbush Decreases." The two effects blend together to bring daily radiation levels down.

.Who cares? Cosmic rays are a surprisingly "down to Earth" form of space weather. They can alter the chemistry of the atmosphere, trigger lightning, and penetrate commercial airplanes. According to a study from the Harvard T.H. Chan school of public health, crews of aircraft have higher rates of cancer than the general population. The researchers listed cosmic rays, irregular sleep habits, and chemical contaminants as leading risk factors. A number of controversial studies (#1, #2, #3, #4) go even further, linking cosmic rays with cardiac arrhythmias and sudden cardiac death.

Technical notes: 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.

Data points in the graph labeled "Stratospheric Radiation" correspond to the peak of the Regener-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 Regener 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.
  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.
  information about sunspots based on the latest NOAA/USAF Active Region Summary
Starlink Satellite Statistics
  current counts of failed and deployed Starlink satellites from Jonathan's Space Page
The Aerospace Corporation
  Authoritative predictions of space junk and satellite re-entries
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
Live Aurora Webcam
  from Lights over Lapland
  the underlying science of space weather

To get the best views of the cosmos, check out the Phoenix Window Glass Replacement experts for all your window and glass needs

To get an up close view of the heavenly bodies surrounding Earth, think about selling your junk car for cash and buying a high quality telescope.
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NASA Near Earth Asteroid Home Page

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