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Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp=
4.67 unsettled
24-hr max: Kp= 4.67 unsettled
explanation | more
data
Interplanetary Mag. Field
Btotal: 7.04 nT
Bz: 5.77 nT north
more data: ACE, DSCOVR
Updated: Today at 0711 UT
Coronal Holes: 13 Jul 25
Earth is inside a stream of solar wind flowing from this coronal hole. Credit: NASA/SDO | more data
Polar Stratospheric Clouds
Colorful Type II polar stratospheric clouds (PSC) form when the temperature in the stratosphere drops to a staggeringly low -85C. NASA's MERRA-2 climate model predicts when the air up there is cold enough:
On Jul 12, 2025, the Arctic stratosphere is much too hot for polar stratospheric clouds. | more data.
Noctilucent Clouds
The northern season for noctilucent clouds is underway. First reports of the electric-blue clouds came from Russia on May 28, 2025. Since then, the clouds have spread to lower latitudes, reaching Paris, France, during a major outbreak on June 23, 2025.
Above: July 10, 2025, in Poland
"The noctilucent cloud season continues. This morning in Poland (53 N) we had another beautiful display of electric-blue clouds. I never tire of it." says photographer Marek Nikodem of Szubin, Poland.
See the complete NLC Photo Gallery
SPACE WEATHER
NOAA Forecasts |
|
Updated at: 2025 Jul 12 2200 UTC
FLARE |
0-24
hr |
24-48
hr |
CLASS M |
55
% |
55
% |
CLASS X |
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: 2025 Jul 12 2200 UTC
Mid-latitudes
|
0-24
hr |
24-48
hr |
ACTIVE |
35
% |
30
% |
MINOR |
20
% |
10
% |
SEVERE |
05
% |
01
% |
High latitudes
|
0-24
hr |
24-48
hr |
ACTIVE |
10
% |
15
% |
MINOR |
25
% |
25
% |
SEVERE |
50
% |
40
% |
|
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|
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This is an AI Free Zone: AI isn't all bad. Large language models are good writers with access to vast stores of data. There's still no substitute for a human being with decades of space weather forecasting experience. This website is 100% human.
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GEOMAGNETIC STORM WATCH (G1): Minor G1-class geomagnetic storms are possible today, July 13th, as Earth passes through a stream of high-speed solar wind. The gaseous material is flowing from an equatorial hole in the sun's atmosphere. Aurora alerts: SMS Text
BEHOLD, "THE BEAST": Around the world, astronomers are monitoring a massive prominence curling over the sun's northeastern limb. David Wilson of Inverness, Scotland, calls it "The Beast":
"This is 3 hours of the giant prominence as seen from my backyard solar observatory," says Wilson. "It looks to me like some huge 4-legged beast shuffling along."
Prominences are clouds of hydrogen held above the surface of the sun by magnetic fields. The shuffling of the Beast is a sign of magnetic instability, and may herald a collapse or magnificent eruption. Photo-op, anyone? Monitoring is encouraged on July 13th.
more images: from Pat P. of Pittsburgh, PA; from Michael Jaeger of AZM Martinsberg Austria; from Michael Borman of Evansville, Indiana; from James Roger Samworth of Nailstone, Leicestershire, UK;
Realtime Space Weather Photo Gallery
Free: Spaceweather.com Newsletter
THE ALIEN ABDUCTION CHRISTMAS ORNAMENT: "Turnabout is fair play," said the cow. You can't buy this on Amazon: The Alien Abduction Christmas Ornamant is only available from the Earth to Sky Store. On July 7, 2025, it flew to the stratosphere onboard a cosmic ray research balloon:
You can have it for $149.95. Hand-sculpted in the USA, this humorous ornament is intricately detailed, from the tied-up alien at the rear of the saucer to the cow at the helm. Durable polyresin construction makes it lightweight enough to hang on any tree, but sturdy enough to last for many Christmases to come--a guaranteed conversation starter!
The students are selling space ornaments to pay the helium bill for their cosmic ray ballooning program. Each one comes with a greeting card showing the ornament in flight and telling the story of its trip 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: Spaceweather.com Newsletter
Realtime Noctilucent Cloud Photo Gallery
Free: Spaceweather.com Newsletter
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 Jul 12, 2025, the network reported 6 fireballs.
(5 sporadics, 1 alpha Capricornid)
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]
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 July 13, 2025 there were 2349 potentially hazardous asteroids.
 |
Recent
& Upcoming Earth-asteroid encounters:
| Asteroid |
Date(UT) |
Miss Distance |
Velocity (km/s) |
Diameter (m) |
| 2025 NJ |
2025-Jul-07 |
9.4 LD |
13.5 |
26 |
| 2025 MO |
2025-Jul-07 |
6.7 LD |
4.6 |
10 |
| 2025 MC92 |
2025-Jul-08 |
4 LD |
5 |
9 |
| 2019 JM |
2025-Jul-09 |
16.6 LD |
6.9 |
14 |
| 2019 NW5 |
2025-Jul-09 |
15.2 LD |
16.5 |
65 |
| 2025 NE1 |
2025-Jul-10 |
18.3 LD |
19.1 |
51 |
| 2025 NR1 |
2025-Jul-10 |
8.5 LD |
13.8 |
89 |
| 2025 MH90 |
2025-Jul-10 |
19.4 LD |
6.5 |
53 |
| 2025 MD89 |
2025-Jul-11 |
14.7 LD |
8.1 |
38 |
| 2005 VO5 |
2025-Jul-11 |
15.9 LD |
14.4 |
397 |
| 2025 NS1 |
2025-Jul-11 |
1.1 LD |
12 |
15 |
| 2025 MD1 |
2025-Jul-11 |
18 LD |
8.9 |
44 |
| 2025 MG1 |
2025-Jul-12 |
13.2 LD |
7.2 |
41 |
| 2025 MA90 |
2025-Jul-15 |
16.9 LD |
9.1 |
89 |
| 2022 YS5 |
2025-Jul-17 |
17.4 LD |
6.1 |
38 |
| 2018 BY6 |
2025-Jul-19 |
13.7 LD |
7.4 |
68 |
| 2025 ME92 |
2025-Jul-20 |
13.4 LD |
5.3 |
31 |
| 2019 CO1 |
2025-Aug-08 |
17.8 LD |
10.5 |
65 |
| 2022 QB1 |
2025-Aug-10 |
8.9 LD |
3.9 |
6 |
| 2021 PJ1 |
2025-Aug-15 |
4.4 LD |
9.3 |
24 |
| 2025 CO3 |
2025-Aug-16 |
19.8 LD |
8.4 |
90 |
| 1997 QK1 |
2025-Aug-20 |
7.9 LD |
9.8 |
315 |
| 2022 QD3 |
2025-Aug-21 |
15 LD |
6.9 |
35 |
| 2023 PX |
2025-Aug-22 |
2.4 LD |
8.3 |
23 |
| 2019 QQ6 |
2025-Aug-24 |
9.4 LD |
17.2 |
31 |
| 2017 RK15 |
2025-Aug-29 |
15.8 LD |
13.2 |
26 |
| 2020 TS1 |
2025-Aug-29 |
17.8 LD |
3.3 |
5 |
| 1998 SH2 |
2025-Aug-30 |
8.1 LD |
17.3 |
246 |
| 2019 JG1 |
2025-Sep-09 |
18.8 LD |
7.9 |
17 |
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, Spaceweather.com 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 10 years, resulting in a unique dataset of in situ atmospheric measurements.
Latest results (Nov. 2024): Atmospheric radiation is sharply decreasing in 2024. Our latest measurements in November registered a 10-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.
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The
official U.S. government space weather bureau |
| |
The
first place to look for information about sundogs,
pillars, rainbows and related phenomena. |
| |
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 |
| |
Realtime
and archival images of the Sun from SOHO. |
| |
information about sunspots based on the latest NOAA/USAF Active Region Summary |
| |
current counts of failed and deployed Starlink satellites from Jonathan's Space Page. See also, all satellite statistics. |
| |
Authoritative predictions of space junk and satellite re-entries |
| |
from
the NOAA Space Environment Center |
| |
fun to read, but should be taken with a grain of salt! Forecasts looking ahead more than a few days are often wrong. |
| |
from the NOAA Space Environment Center |
| |
the
underlying science of space weather |
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