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SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids
 
Solar wind
speed: 375.5 km/sec
density: 2.17 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1147 UT
X-ray Solar Flares
6-hr max: C2
2212 UT May25
24-hr: C5
1726 UT May25
explanation | more data
Updated: Today at: 2350 UT
Daily Sun: 25 May 24
Expand: labels | no labels | Carrington
A sunspot emerging over the sun's northeastern limb appears to be the return of old sunspot AR3663, which unleashed multiple X-class solar flares in early May. Credit: SDO/HMI

Sunspot number: 100
What is the sunspot number?
Updated 25 May 2024

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 25 May 2024


Thermosphere Climate Index
today: 26.38x1010 W Hot
Max: 49.4
x1010 W Hot (10/1957)
Min: 2.05
x1010 W Cold (02/2009)
explanation | more data: gfx, txt
Updated 25 May 2024

The Radio Sun
10.7 cm flux: 176 sfu
explanation | more data
Updated 25 May 2024

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: -6.2% Low
48-hr change: +0.4%
Max: +11.7% Very High
(12/2009)
Min: -32.1% Very Low (06/1991)
explanation | more data
Updated 25 May 2024 @ 0700 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
quiet
explanation | more data
Interplanetary Mag. Field
Btotal: 6.43 nT
Bz: -0.46 nT south
more data: ACE, DSCOVR
Updated: Today at 1147 UT
Coronal Holes: 25 May 24

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

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 May 25, 2024, the Arctic stratosphere is much too warm for Type II polar stratospheric clouds. | more data.

Noctilucent Clouds
The southern season for NLCs is over. The first clouds were detected inside the Antarctic Circle on Dec. 4, 2023, by the NOAA 21 satellite. The same satellite detected the last cloud on Feb. 21, 2024. Daily maps are now blank:

noctilucent clouds
Updated: Feb 22, 2024

An instrument onboard NOAA 21 (OMPS LP) is able to detect NLCs (also known as "polar mesospheric clouds" or PMCs). Now that the southern season has ended, attention turns to the northern hemisphere. The first NLCs should appear inside the Arctic Circle in mid to late May.

SPACE WEATHER
NOAA Forecasts
Updated at: 2024 May 25 2200 UTC
FLARE
0-24 hr
24-48 hr
CLASS M
40 %
40 %
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: 2024 May 25 2200 UTC
Mid-latitudes
0-24 hr
24-48 hr
ACTIVE
30 %
15 %
MINOR
10 %
05 %
SEVERE
01 %
01 %
High latitudes
0-24 hr
24-48 hr
ACTIVE
15 %
15 %
MINOR
25 %
25 %
SEVERE
40 %
20 %
 
Saturday, May. 25, 2024
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, artificial, frequently inaccurate. If you find a mistake on Spaceweather.com, rest assured it was made by a real human being.

 

RETURN OF A POTENTIALLY-DANGEROUS SUNSPOT: A sunspot emerging over the sun's northeastern limb appears to be old sunspot AR3663 returning after a 2-week trip around the farside of the sun. In early May, this sunspot unleashed multiple X-class solar flares. Solar flare alerts: SMS Text

ROCKS AND SOIL ELECTRIFIED BY THE SUPERSTORM: Across the USA on May 10th and 11th, sky watchers marveled at bright displays of aurora borealis during the biggest geomagnetic storm in decades. Little did they know, something was also happening underfoot.

Strong electrical currents were surging through rocks and soil. The biggest voltages along the US eastern seaboard and in the Midwest were as much as 10,000 times normal. A map from NOAA and the US Geological Survey shows some of the 'hot spots' during the early hours of May 11th:

Back in March 1989, voltages only a little stronger than the ones shown above brought down the entire Hydro-Québec power system. The resulting Great Québec Blackout plunged millions of Canadians into darkness.

This time, however, power grids stayed up. "We haven't heard of any serious problems so far," reports Christopher Balch of NOAA's Space Weather Prediction Center.

Balch leads an effort at NOAA to model geoelectric fields during solar storms. The map, above, is a snapshot from a real-time display that takes into account the 3D conductivity of the Earth and ongoing geomagnetic activity. A computer at the Space Weather Prediction Center crunches the data to produce minute-by-minute estimates of electricity in the ground.

"I started working on this in 2011 after a NOAA Space Weather Workshop where representatives from the power industry asked for a geoelectric field model," recalls Balch. "It's a collaboration between NOAA, the US Geological Survey and others; we now have a version that covers much of Canada and the United States"


A power blackout (left) and transformer damage (right) during the March 1989 storm.

When researchers talk about geoelectric fields they use units of volts per km (V/km). Earth's crust naturally contains quiet-time fields measuring as little as 0.01 V/km. During geomagnetic storms, these values skyrocket.

"On May 10-11, geoelectric amplitudes exceeded 10 V/km in Virginia and 9 V/km in the upper Midwest," says Jeffrey Love, a key member of the collaboration at the USGS. "These are very high. For comparison, we estimate that geoelectric amplitudes reached almost 22 V/km in Virginia during the March 1989 storm."

This means the May 2024 storm was, electrically speaking, about half as intense as the storm that blacked out Québec 35 years ago. That's too close for comfort. "Although power companies have taken measures to improve the resilience of their systems, no one would welcome another storm as intense as that of March 1989," says Love.

Realtime electric field maps are published 24/7 on the NOAA website. During the next geomagnetic storm, click here to see what's happening underfoot!

Realtime Space Weather Photo Gallery
Free:
Spaceweather.com Newsletter

18K GOLD TOTAL ECLIPSE PENDANT: This pendant has touched the shadow of the Moon. On April 8, 2024, during a total eclipse of the sun in Texas, the students of Earth to Sky Calculus launched it to the stratosphere onboard a cosmic ray research balloon. Floating more than 118,110 feet high, the locket spent 3 minutes and 45 seconds wrapped in lunar shadow:

You can have it for $199.95. The 18K gold-plated locket is inscribed with the words "I love you to the Moon and back," and opens to hold a personal photo or other small item. It comes with a greeting card showing the locket in flight and telling the story of its journey to the edge of space during the total eclipse.

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


Realtime Comet Photo Gallery
Free:
Spaceweather.com Newsletter


Realtime Aurora 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 May 25, 2024, the network reported 9 fireballs.
(9 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 May 25, 2024 there were 2349 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
Asteroid
Date(UT)
Miss Distance
Velocity (km/s)
Diameter (m)
2024 JD1
2024-May-20
19 LD
5.5
27
2015 WO1
2024-May-20
7.4 LD
15.6
86
2024 JP12
2024-May-21
11 LD
6.3
19
2024 JZ17
2024-May-21
6.6 LD
10.3
23
2024 KC
2024-May-21
4.3 LD
4.6
7
2019 VB5
2024-May-21
7.8 LD
6.3
2
2024 JG15
2024-May-22
6.6 LD
10.8
63
2024 JZ6
2024-May-23
14.6 LD
13.8
243
2024 HP
2024-May-23
15.5 LD
7.7
186
2024 JX14
2024-May-23
16.4 LD
6.2
27
2024 HP2
2024-May-25
5.8 LD
2.3
19
2024 JY1
2024-May-26
17.5 LD
10.3
52
2024 JO16
2024-May-27
8 LD
8.8
20
2008 LD
2024-May-28
7.7 LD
4.5
6
2024 JV17
2024-May-28
17.3 LD
8.4
44
2021 LV
2024-May-29
12 LD
15.5
9
2024 JG
2024-May-29
8.7 LD
7.4
29
2024 JA3
2024-May-30
6.2 LD
8.5
36
2008 XH
2024-May-31
13.8 LD
14.7
102
2024 JP1
2024-Jun-01
18.5 LD
4.7
25
2024 JC1
2024-Jun-01
15.1 LD
4.8
32
1998 KY26
2024-Jun-01
12 LD
5.3
25
2016 JC6
2024-Jun-01
19.9 LD
7.1
188
2024 JR17
2024-Jun-05
19.4 LD
14.6
87
2008 YN2
2024-Jun-05
10.5 LD
7.7
20
2021 LW3
2024-Jun-06
9.7 LD
9.8
86
2024 CR9
2024-Jun-11
19.2 LD
7.4
447
2022 XC1
2024-Jun-12
16.5 LD
6.5
21
2022 WW11
2024-Jun-17
19.7 LD
14.4
15
2019 NJ
2024-Jun-27
17.2 LD
10.1
66
415029
2024-Jun-27
17.3 LD
25.9
2304
2022 MM1
2024-Jun-28
7.8 LD
10.9
39
2010 XN
2024-Jun-28
14.1 LD
11.3
52
2022 HD1
2024-Jun-29
17.3 LD
7.2
63
2017 MB3
2024-Jun-30
5 LD
6.5
30
2022 BY39
2024-Jul-02
13.2 LD
3
4
2022 YS5
2024-Jul-11
11 LD
5.8
38
2024 BY15
2024-Jul-16
16.2 LD
0.7
16
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 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.
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

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