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Daily Sun: 02 Mar 26

Spotless Days Current Stretch: 0 days 2026 total: 3 days (5%) 2025 total: 0 days (0%) 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 02 Mar 2026Thermosphere Climate Index today: 20.75x1010 W Warm Max: 49.4x1010 W Hot (10/1957) Min: 2.05x1010 W Cold (02/2009) explanation | more data: gfx, txt Updated 02 Mar 2026

The Radio Sun 10.7 cm flux: 147 sfu explanation | more data Updated 02 Mar 2026

Cosmic Rays Solar Cycle 25 is near its peak, 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: -8.6% Low 48-hr change: +0.4% Max: +11.7% Very High (12/2009) Min: -32.1% Very Low (06/1991) explanation |more data Updated 01 Mar 2026 @ 0700 UT

SPACE WEATHER NOAA Forecasts

This is an AI Free Zone: Text created by Large Language Models is spreading 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.

SUNSPOTS ARE BACK: After 3 days of blank suns last week, solar activity has returned to normal with multiple sunspot groups crossing the solar disk. Solar Cycle 25 has some life left, after all. NOAA forecasters estimate a 25% chance of M-class flares and a 5% chance of X-flares on March 2nd and 3rd. Solar flare alerts: SMS Text

WHEN TO SEE THE LUNAR ECLIPSE: Wide awake at 3:00 a.m.? Studies show that sleep deprivation is epidemic. On the bright side, it's the perfect time to see tonight's total eclipse of the Moon. In the USA, totality is underway before sunrise on Tuesday, March 3rd, around 3 o'clock Pacific Time:

More Time Zones: EST, CST, MST, PST, UTC.

What you see in that graphic is the full Moon turning red as it passes through the shadow of our planet. Earth's shadow is reddened by every sunset and sunrise in the world while the eclipse is in progress--hence the red color of the Moon. A NASA video explains it. Totality lasts for about an hour.

This eclipse will be visible in the Americas, the Pacific Ocean, Australia and much of Asia: visibility map. While people in the Americas can see the eclipse before sunrise on Tuesday, observers across Pacific will see it on Tuesday evening instead--not so hard to wake up!

If you are in the eclipse zone, enjoy the show and submit your photos here.

Realtime Eclipse Photo Gallery Free: Spaceweather.com Newsletter

THE RAINBOW ROSE FROM SPACE: This is no ordinary rose. It shimmers with all the colors of the rainbow, and it has been to the edge of space:

You can have it for $127.95. The rainbow rose flew through the stratosphere on Jan. 24th carried by an Earth to Sky Calculus cosmic ray research balloon. The artificial bloom comes with a greeting card showing the rose in flight, and telling the story of its journey to the top of Earth's atmosphere. It makes a great birthday, anniversary, or (coming soon!) Mother's Day gift.

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

On March 01, 2026, the network reported 6 fireballs. (6 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]

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.

NOAA Space Weather Prediction Center

Atmospheric Optics

Solar Dynamics Observatory

STEREO

Solar and Heliospheric Observatory

SolarMonitor.org

Starlink Satellite Statistics

The Aerospace Corporation

Daily Sunspot Summaries

NOAA 27-Day Space Weather Forecasts

Aurora 30 min forecast

Live Aurora Webcam

Heliophysics

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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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