 | | | Switch to: Europe, USA, New Zealand, Antarctica Credit: NOAA/Ovation  Planetary K-index
Now: Kp= 1.67 quiet
24-hr max: Kp= 4.33 unsettled
explanation | more data
Interplanetary Mag. Field
Btotal: 7.26 nT
Bz: 2.40 nT north
more data: ACE, DSCOVR
Updated: Today at 1143 UT Coronal Holes: 11 Feb 24 
There are no significant 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 Feb. 11, 2024, the Arctic stratosphere is too warm for Type II polar stratospheric clouds. | more data. Noctilucent Clouds
The southern season for NLCs is underway. The first clouds were detected inside the Antarctic Circle on Dec. 4, 2023, by the NOAA 21 satellite. An instrument onboard NOAA 21 (OMPS LP) is able to detect NLCs (also known as "polar mesospheric clouds" or PMCs). For the rest of the season, daily maps from NOAA 21 will be presented here:
Updated: Feb 11, 2024
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: 2024 Feb 11 2200 UTC FLARE | 0-24 hr | 24-48 hr | CLASS M | 65 % | 65 % | 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: 2024 Feb 11 2200 UTC Mid-latitudes | 0-24 hr | 24-48 hr | ACTIVE | 40 % | 40 % | MINOR | 25 % | 35 % | SEVERE | 05 % | 10 % | High latitudes | 0-24 hr | 24-48 hr | ACTIVE | 10 % | 05 % | MINOR | 25 % | 25 % | SEVERE | 60 % | 70 % | | | |  | | | | | | | | | | | This is an AI Free Zone! Text created by ChatGPT and other 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. | | | UNEXPECTED CME IMPACT (UPDATED): A CME hit Earth's magnetic field on Feb. 11th (0211 UT). The unexpected impact jolted a USGS magnetometer in Boulder, Colorado, by 40 nanoTesla, but did not trigger a geomagnetic storm. This may have been the overdue CME from an M4-class flare on Feb. 6th, previously thought to have missed Earth. CME Impact alerts: SMS Text EARTH-DIRECTED SOLAR FLARE AND CME: Big sunspot AR3576 erupted yesterday (Feb 10th @ 2703 UT), producing an M9-class solar flare only percentage points from category X. NASA's Solar Dynamics Observatory captured the extreme ultraviolet flash: 
Radiation from the flare ionized the top of Earth's atmosphere. This, in turn, caused a strong shortwave radio blackout over the Pacific Ocean. Mariners and ham radio operators may have noticed loss of signal at frequencies below 30 MHz for as much as an hour after the flare's peak. Of greater interest is the coronal mass ejection (CME). New images from the Solar and Heliospheric Observatory show an assymetric halo CME with an Earth-directed component. A preliminary NASA model predicts it will reach Earth on Feb. 13th: 
Although the majority of the CME will pass north of Earth, a significant fraction of the cloud is on the sun-Earth line. Its impact could spark G1- to G2-class geomagnetic storm. Aurora-lovers could see lights in the sky the night before Valentine's Day. CME Impact alerts: SMS Text Realtime Space Weather Photo Gallery
Free: Spaceweather.com Newsletter VALENTINE'S GIFTS FROM THE EDGE OF SPACE: Does your sweetheart love space? Shop the Earth to Sky Store for their perfect Valentine's Day gift. All items have flown to the stratosphere on board cosmic ray research balloons--and from now until Feb. 14th, everything is 10% off:
Each purchase comes with a greeting card showing the item in flight and telling the story of its journey to the stratosphere and back again. Don't forget to enter the coupon code "ILOVESPACE" for your Valentine's discount!
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Realtime Aurora Photo Gallery
Free: Spaceweather.com Newsletter
Realtime Comet 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 Feb 11, 2024, the network reported 3 fireballs.
(3 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 February 11, 2024 there were 2349 potentially hazardous asteroids.
 | Recent & Upcoming Earth-asteroid encounters: | Asteroid | Date(UT) | Miss Distance | Velocity (km/s) | Diameter (m) | | 2024 BT3 | 2024-Feb-06 | 14.1 LD | 5 | 15 | | 2024 BO | 2024-Feb-06 | 19.8 LD | 6.1 | 32 | | 2023 SP1 | 2024-Feb-07 | 14.3 LD | 11.8 | 256 | | 2024 BW4 | 2024-Feb-07 | 11.6 LD | 22.1 | 53 | | 2024 CF2 | 2024-Feb-07 | 3.5 LD | 29.4 | 18 | | 2024 CG2 | 2024-Feb-08 | 2.6 LD | 9.2 | 86 | | 2024 CK1 | 2024-Feb-08 | 0.6 LD | 12.1 | 5 | | 2024 CJ1 | 2024-Feb-09 | 1 LD | 7.6 | 7 | | 2024 BH | 2024-Feb-10 | 18.4 LD | 8.1 | 69 | | 2024 CV1 | 2024-Feb-10 | 5.2 LD | 3.1 | 6 | | 2024 CU | 2024-Feb-11 | 1.8 LD | 7.2 | 20 | | 2024 CY1 | 2024-Feb-12 | 0.3 LD | 14.6 | 5 | | 2020 DK | 2024-Feb-12 | 8.9 LD | 9.9 | 22 | | 2024 CB1 | 2024-Feb-13 | 3.8 LD | 17.5 | 52 | | 2024 CD1 | 2024-Feb-14 | 9.9 LD | 12.3 | 19 | | 2024 CL1 | 2024-Feb-14 | 3.4 LD | 14.3 | 25 | | 2024 BR4 | 2024-Feb-14 | 12 LD | 12.5 | 179 | | 2024 CU1 | 2024-Feb-14 | 1.5 LD | 10.8 | 20 | | 2024 CE1 | 2024-Feb-15 | 11.1 LD | 9.2 | 28 | | 2024 AO | 2024-Feb-16 | 9.3 LD | 7.3 | 52 | | 2024 CA2 | 2024-Feb-16 | 11.8 LD | 10.7 | 48 | | 2024 BC8 | 2024-Feb-18 | 6.2 LD | 10.5 | 29 | | 2024 CH2 | 2024-Feb-18 | 5.7 LD | 9.6 | 21 | | 2019 DA1 | 2024-Mar-03 | 14.6 LD | 13.4 | 22 | | 2015 FM34 | 2024-Mar-12 | 19.4 LD | 11.1 | 113 | | 2020 FU | 2024-Mar-15 | 14.9 LD | 15.5 | 19 | | 2020 FD | 2024-Mar-18 | 4.5 LD | 15.1 | 10 | | 2024 BD7 | 2024-Mar-19 | 18.8 LD | 10.1 | 140 | | 2019 CJ | 2024-Mar-24 | 12.4 LD | 4.4 | 30 | | 2021 CF6 | 2024-Mar-25 | 14.5 LD | 8.3 | 63 | | 2023 RO49 | 2024-Mar-29 | 14.1 LD | 4.3 | 45 | | 2015 MB54 | 2024-Mar-30 | 11.7 LD | 3.8 | 55 | | 2018 CC14 | 2024-Apr-03 | 19.6 LD | 8.9 | 114 | | 2023 GC2 | 2024-Apr-04 | 8.7 LD | 5.7 | 12 | | 2005 FG | 2024-Apr-08 | 18.4 LD | 5.5 | 59 | | 2020 BP13 | 2024-Apr-09 | 15.2 LD | 6.8 | 204 | 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. | | 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 | | | 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 |  | When looking for casinos to play online when the weather is bad, you can try the SkyCity Online Casino if you are located in New Zealand. If you are not from NZ you can try the Swedish page Svenska casino online to find suitable games, check out svenskacasinoonline.net. Always check your local laws before playing with real money.. | | BestCSGOGambling is the best site for everything related to CSGO gambling on the web | | | These links help Spaceweather.com stay online. Thank you to our supporters! | | | | | | | | |  | | |  | ©2021 Spaceweather.com. All rights reserved. This site is penned daily by Dr. Tony Phillips. | |
