 | | |  SPACE WEATHER
NOAA Forecasts | | Updated at: 2026 Mar 31 2200 UTC FLARE | 0-24 hr | 24-48 hr | CLASS M | 55 % | 55 % | CLASS X | 20 % | 20 % |  Geomagnetic Storms:
Probabilities for significant disturbances in Earth's magnetic field are given for three activity levels: active, minor storm, severe storm Updated at: 2026 Mar 31 2200 UTC Mid-latitudes | 0-24 hr | 24-48 hr | ACTIVE | 40 % | 40 % | MINOR | 25 % | 25 % | SEVERE | 05 % | 05 % | High latitudes | 0-24 hr | 24-48 hr | ACTIVE | 10 % | 10 % | MINOR | 25 % | 25 % | SEVERE | 60 % | 60 % | | | |  | | | | | | | | | | | This is an AI Free Zone: AI is everywhere -- except here. Every word on Spaceweather.com comes directly from the pen of Dr. Tony Phillips. If you find a mistake, rest assured it was made by a real human being. | | | WAITING FOR THE CME: A CME launched by an X1.5-class solar flare on March 30th is overdue. It hasn't yet hit Earth. The longer we wait, the less likely it is to produce a significant geomagnetic storm. Currently, NOAA is predicting a moderate G2-class storm on April 1st, not enough to delay the launch of Artemis II or indeed to affect the mission in any way. CME impact alerts: SMS Text HOW SOLAR FLARES CAN DIM THE SUN: Solar flares are explosions of electromagnetic radiation that temporarily brighten the sun. However, yesterday's X1.5-class solar flare did the opposite. The explosion caused an area around the blast site to become darker, shown here in an extreme ultraviolet (EUV) movie from NASA's Solar Dynamics Observatory: 
"This is a nice example of 'EUV dimming,'" says Sam Freeland of the Lockheed Martin Solar and Astrophysics Laboratory, who made the movie. "It happens when an explosion on the sun produces a CME." Where did all the bright stuff go? It left the sun. Glowing-hot plasma around the exploding sunspot joined a CME (coronal mass ejection) and departed, leaving only darkness behind. Here is what the actual CME looked like. Space weather forecasters look for EUV dimming immediately after any strong flare to see if a CME might be coming. Hours later, coronagraph images typically confirm their first guess. Darkness tells the tale. CME impact alerts: SMS Text Realtime Space Weather Photo Gallery
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Realtime Comet Photo Gallery
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Realtime Aurora 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 March 31, 2026, 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] 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 March 31, 2026 there were 2349 potentially hazardous asteroids.
 | Recent & Upcoming Earth-asteroid encounters: | Asteroid | Date(UT) | Miss Distance | Velocity (km/s) | Diameter (m) | | 2026 FP8 | 2026-Mar-26 | 2.8 LD | 20.9 | 14 | | 2026 FB3 | 2026-Mar-26 | 7.4 LD | 13.1 | 17 | | 2026 FN12 | 2026-Mar-26 | 10.9 LD | 15.6 | 32 | | 2026 FL12 | 2026-Mar-26 | 0.9 LD | 11 | 5 | | 2026 FB4 | 2026-Mar-26 | 1.7 LD | 10.4 | 9 | | 2026 FA3 | 2026-Mar-27 | 7.5 LD | 13.8 | 17 | | 2026 FR2 | 2026-Mar-28 | 18.1 LD | 11.6 | 26 | | 2026 FX5 | 2026-Mar-28 | 7.7 LD | 12.2 | 15 | | 2026 FL4 | 2026-Mar-28 | 4.9 LD | 19.3 | 14 | | 2026 FO8 | 2026-Mar-28 | 10.7 LD | 7.8 | 17 | | 2026 FU2 | 2026-Mar-28 | 2.4 LD | 13.2 | 11 | | 2026 FF6 | 2026-Mar-29 | 7.7 LD | 19.8 | 35 | | 2026 FG6 | 2026-Mar-29 | 1.8 LD | 10.2 | 11 | | 2026 FN1 | 2026-Mar-30 | 8.5 LD | 9.9 | 18 | | 2026 FA4 | 2026-Mar-30 | 16.3 LD | 11.6 | 21 | | 2026 FV3 | 2026-Mar-31 | 10.9 LD | 11.1 | 23 | | 2026 FZ6 | 2026-Mar-31 | 10.4 LD | 7.2 | 15 | | 2026 FJ | 2026-Mar-31 | 7.7 LD | 2.2 | 12 | | 2026 FV5 | 2026-Apr-01 | 11.7 LD | 5.6 | 12 | | 2026 FC7 | 2026-Apr-01 | 19 LD | 11 | 24 | | 2026 FH7 | 2026-Apr-01 | 1.9 LD | 8.3 | 15 | | 2026 FQ8 | 2026-Apr-02 | 8.1 LD | 8.1 | 23 | | 2026 FD4 | 2026-Apr-02 | 8 LD | 6 | 10 | | 2026 FR6 | 2026-Apr-02 | 15.3 LD | 17.1 | 25 | | 2026 FR4 | 2026-Apr-02 | 14 LD | 6.8 | 12 | | 2025 GL | 2026-Apr-03 | 9.8 LD | 6.4 | 5 | | 2019 FQ1 | 2026-Apr-03 | 9.6 LD | 10.1 | 13 | | 2023 DZ2 | 2026-Apr-04 | 2.6 LD | 7.2 | 49 | | 2026 FG5 | 2026-Apr-04 | 8.6 LD | 24.9 | 35 | | 2026 FB6 | 2026-Apr-04 | 12.6 LD | 6.8 | 10 | | 2026 FH6 | 2026-Apr-04 | 18.1 LD | 8.1 | 37 | | 2026 FF7 | 2026-Apr-04 | 4.6 LD | 13.1 | 11 | | 2026 FW6 | 2026-Apr-05 | 15.4 LD | 19.8 | 27 | | 2021 GN6 | 2026-Apr-06 | 5.8 LD | 7 | 14 | | 2011 FT9 | 2026-Apr-07 | 3.4 LD | 5.9 | 20 | | 2024 TB7 | 2026-Apr-07 | 4.9 LD | 7.5 | 5 | | 2002 TB70 | 2026-Apr-07 | 13.4 LD | 9.2 | 164 | | 2022 GE2 | 2026-Apr-10 | 12 LD | 9.2 | 15 | | 2026 FE7 | 2026-Apr-11 | 8.9 LD | 7.9 | 28 | | 2023 HB4 | 2026-Apr-12 | 16.8 LD | 8.7 | 15 | | 2026 FV6 | 2026-Apr-13 | 7.4 LD | 11.1 | 29 | | 2013 GM3 | 2026-Apr-14 | 0.7 LD | 7.4 | 20 | | 2026 FJ6 | 2026-Apr-18 | 15.8 LD | 9.8 | 95 | | 2026 AC4 | 2026-Apr-20 | 10.7 LD | 1.2 | 22 | | 2022 UG2 | 2026-Apr-20 | 16.3 LD | 10.3 | 13 | | 2025 HQ4 | 2026-Apr-21 | 16.4 LD | 12.5 | 22 | | 2026 BK2 | 2026-Apr-22 | 10 LD | 8.1 | 219 | | 2022 UU8 | 2026-Apr-25 | 8.7 LD | 4 | 9 | | 2020 GE3 | 2026-May-09 | 11.1 LD | 6 | 21 | | 2023 VR5 | 2026-May-16 | 7.5 LD | 2.3 | 10 | | 2025 KR4 | 2026-May-18 | 15.2 LD | 5.9 | 22 | | 2023 KH4 | 2026-May-24 | 5.5 LD | 7.9 | 14 | | 2023 KZ1 | 2026-May-24 | 9 LD | 13.4 | 20 | 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. | | 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 |  | 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. | | | These links help Spaceweather.com stay online. Thank you to our supporters! | | | Baltimore Car Accident Lawyers Onlinecasinoinformatie.com is an expert in comparing foreign online casinos for players in the Netherlands, offering reliable insights, clear reviews, and up-to-date information Trusted casinos not connected to GamStop Most Trusted seller for 1:1 super clone watches in the market Premium quality super clone watches for sale with true 1:1 detailing Buy Instagram Followers Text: from Smikky! For the new best Norwegian casinos, visit nyecasino.com
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