Solar wind
speed: 292.3 km/sec
density: 3.48 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0506 UT
X-ray Solar Flares
6-hr max: C3 1644 UT Jan27
24-hr: M2 0812 UT Jan27
explanation | more data
Updated: Today at: 1710 UT
Daily Sun: 27 Jan 25
Expand: labels | no labels | Carrington
All of these sunspots are stable and quiet. Photo credit: NASA/SDO

Sunspot number: 140
What is the sunspot number?
Updated 27 Jan 2025

Spotless Days
Current Stretch: 0 days
2024 total: 0 days (0%)
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 27 Jan 2025

Thermosphere Climate Index
 today: 26.68x1010 W Hot
Max: 49.4x1010 W Hot (10/1957)
Min: 2.05x1010 W Cold (02/2009)
explanation | more data: gfx, txt
Updated 26 Jan 2025

The Radio Sun
10.7 cm flux: 171 sfu
explanation | more data
Updated 27 Jan 2025

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: -7.7% Low
48-hr change: -1.0%
Max: +11.7% Very High (12/2009)
Min: -32.1% Very Low (06/1991)
explanation | more data
Updated 27 Jan 2025 @ 0700 UT

Current Auroral Oval:
Switch to: Europe, USA, New Zealand, Antarctica
Credit: NOAA/Ovation
Planetary K-index
Now: Kp= 2.00 quiet
24-hr max: Kp= 2.33 quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 8.08 nT
Bz: 1.75 nT north
more data: ACE, DSCOVR
Updated: Today at 0507 UT
Coronal Holes: 27 Jan 25

Solar wind flowing from this large coronal hole could reach Earth on Jan 31st. 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 Jan 27, 2025, the Arctic stratosphere is cold enough for Type II clouds. | more data.

Noctilucent Clouds
The southern season for noctilucent clouds (NLCs) is underway!. The first clouds were detected over Antarctica on Nov. 19, 2024. Here is the current NLC map from the NOAA 21 satellite.

noctilucent clouds
Updated: Jan. 22, 2025

An instrument onboard NOAA 21 (OMPS LP) is able to detect NLCs (also known as "polar mesospheric clouds" or PMCs). In the daily map, above, each dot is a detected cloud. As the season progresses, these dots will multiply in number and shift in hue from blue to red as the brightness of the clouds intensifies.

SPACE WEATHER
NOAA Forecasts
Updated at: 2025 Jan 26 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
45 %
35 %
CLASS X
10 %
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 Jan 26 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
05 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
20 %
20 %
SEVERE
20 %
20 %
 
Monday, Jan. 27, 2025
What's up in space
       
 

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

 

GEOMAGETIC STORM WATCH--AGAIN: A new CME is heading for Earth, maybe. The storm cloud was hurled into space by a dramatic filament eruption on Jan. 26th. Most of the CME will sail south of our planet, but NOAA forecasters believe it could graze Earth as it passes by. If so, a G1-class geomagnetic storm could occur on Jan. 29th. CME impact alerts: SMS Text.

POLAR STRATOSPHERIC CLOUD ALERT: The Arctic Circle could soon be filled with Type II Polar Stratospheric Clouds (PSCs)--widely regarded as the most beautiful clouds on Earth. This forecast is based on NASA's satellite-based MERRA2 climate model, which shows stratospheric temperatures dropping to record low values in the days ahead. Note the red arrow:

The air temperature of the polar stratosphere could soon drop to its lowest value in nearly 50 years, if the forecast holds. This sets the stage for intense PSCs.

Normally, Earth's stratosphere has no clouds at all. Only when the temperature drops to a staggeringly-low -85 C (188 K) can widely-spaced water molecules in the stratosphere assemble into Type II PSCs. With colors that rival auroras, these clouds are stunning to behold. Arctic sky watchers, if you see PSCs in the days ahead, please submit your photos here.

Realtime PSC Photo Gallery
Free: Spaceweather.com Newsletter

THE "HEADLESS WONDER" COMET ATLAS: "Last night, I had the chance to observe and photograph a scene of rare beauty," reports Daniele Gasparri from the Atacama desert in Chile. "Comet ATLAS (C/2024 G3) was perfectly visible to the naked eye, with its very long tail standing out against the colors of the sunset and extending all the way toward Venus."

"Between these two 'giants' of the sky, I also could see Saturn, the zodiacal light, and a thin greenish band of airglow," says Gasparri. "This image was taken with a Sony A7s camera. It is the mean of 11 exposures of 20 seconds each."

You might not guess from Gasparri's photo, but Comet ATLAS disintegrated more than a week ago. A close encounter with the sun in mid-January overheated the comet's nucleus, suddenly dumping a whole comet's worth of gas and dust into its flamboyant tail. Comet ATLAS is now a "headless wonder" visible from the southern hemisphere. Browse the Comet ATLAS photo gallery for the latest images.

Realtime Comet ATLAS Photo Gallery
Free: Spaceweather.com Newsletter

STRING OF HEARTS SNOOPY SCULPTURE: Valentine's Day is only 3 weeks away. Are you looking for a fun, romantic gift? Consider the String of Hearts Snoopy Sculpture. Here is the hand-painted figurine floating 112,505 feet above Earth's surface on Jan. 30, 2024:

You can have it for $142.95. The students of Earth to Sky Calculus launched this stone resin sculpture to the stratosphere onboard a cosmic ray research balloon. It spent more than 2 hours floating at the top of Earth's atmosphere while cosmic ray sensors gathered data for the student's atmospheric radiation monitoring program.

This unique Valentine's gift comes with a greeting card showing the sculpture in flight and telling the story of its journey to the edges of space. All sales support hands-on STEM education and 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 Jan 25, 2025, the network reported 5 fireballs.
(5 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 27, 2025 there were 2349 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Velocity (km/s)
Diameter (m)
2025 BF4
2025-Jan-21
11.9 LD
7.7
13
2025 BC1
2025-Jan-21
13.2 LD
21.1
16
2017 BN92
2025-Jan-21
4.7 LD
6.2
27
2025 BG2
2025-Jan-22
13.6 LD
15.2
70
2025 BJ1
2025-Jan-22
7.1 LD
14.3
20
2025 BP4
2025-Jan-23
0.8 LD
22.1
5
2025 BB4
2025-Jan-23
1.4 LD
14.6
9
2025 BK
2025-Jan-25
15.4 LD
10.4
53
2025 BW
2025-Jan-25
10.5 LD
6.1
10
2024 YY5
2025-Jan-26
12.5 LD
2.4
14
2025 BH2
2025-Jan-27
18 LD
7.1
33
2025 BS4
2025-Jan-28
2.1 LD
16
7
2022 BX6
2025-Jan-28
19.7 LD
14.3
24
2025 BS2
2025-Jan-29
9.8 LD
9.9
16
2025 BY1
2025-Jan-29
6.9 LD
7.7
11
2025 BJ2
2025-Jan-30
15.3 LD
15.6
38
2025 BU3
2025-Jan-30
3.4 LD
12.3
39
2015 DJ155
2025-Jan-31
18.6 LD
9.2
56
2025 BR2
2025-Jan-31
13.5 LD
13.7
18
2025 BG4
2025-Feb-01
13 LD
17.9
23
2025 BU
2025-Feb-02
8.8 LD
5.1
17
2025 BK3
2025-Feb-03
11.1 LD
3.5
10
2018 RE3
2025-Feb-03
15.5 LD
11.1
12
2022 AV4
2025-Feb-03
16.9 LD
3.4
25
2002 CC14
2025-Feb-04
8.4 LD
12.7
39
2025 BB2
2025-Feb-04
0.8 LD
6.5
27
2025 BR
2025-Feb-04
12.3 LD
6.1
18
2016 CO248
2025-Feb-07
13.5 LD
5.9
11
2020 GZ2
2025-Feb-07
17.7 LD
8.9
9
2022 PK1
2025-Feb-07
15 LD
11
33
2012 PB20
2025-Feb-09
3.5 LD
4.3
37
2004 XG
2025-Feb-16
15.6 LD
9.1
54
2025 BX1
2025-Feb-16
7.3 LD
10.3
53
2024 UD26
2025-Feb-16
16.8 LD
9.3
250
2014 CE13
2025-Feb-18
15.2 LD
18.4
55
2022 DG2
2025-Feb-19
11.5 LD
10.4
7
2016 AX165
2025-Feb-20
14.9 LD
9.2
89
2015 BK509
2025-Feb-25
9.4 LD
14.6
119
2023 RW3
2025-Feb-25
7.4 LD
5.1
18
535844
2025-Mar-05
9.6 LD
7.9
149
2021 EU3
2025-Mar-10
10.7 LD
4.4
13
2020 FO
2025-Mar-15
13.4 LD
20.6
23
2021 FH1
2025-Mar-21
3.9 LD
13.8
31
2014 TN17
2025-Mar-26
13.3 LD
21.5
174
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 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.

  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.
SolarMonitor.org
  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. See also, all satellite statistics.
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
Heliophysics
  the underlying science of space weather

Spaceweather.com welcomes these supporters of science communication: RV Sales and Arizona Web Design & SEO and Dentist in Phoenix, AZand Commercial Cleaning Phoenix | Pest Control in Phoenix | HVAC repair in South Jersey | Dental implants New Jersey | Dental Implants New Jersey

To get the best views of the cosmos, check out the Phoenix Window Glass Replacement experts for all your window and glass needs
Got a chipped or cracked windshield that prevents you from seeing space weather events while driving? Get windshield replacement from SR Windows & Glass with free mobile auto glass service anywhere in the Phoenix area.
NASA Near Earth Asteroid Home Page

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T CrB NOVA WATCH
today: m=10.6 (Jan 27.5)
yesterday: m=10.3
more: AAVSO data

Explanation: When the nova explodes, the visual magnitude of the star (m) will jump from +10 (invisible to the naked eye) to +2 (about as bright as the North Star).



Moon Phases


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