The northern lights take their energy from the Sun, but the glow itself is made here, in our own air. This episode follows that energy the long way round: why a flare's light and the solar wind run on different clocks, how Earth's magnetic space speeds up the electrons behind the familiar nighttime display, and how one gas, oxygen, gives off both the green and the red. Then the tenth of October by the numbers: what NOAA's storm scale and the Kp index measure, and why a storm number can't promise anyone's sky. Why it's worth your drive: NOAA's weekly report says geomagnetic activity reached G3 (Strong) on October 10, 2026. The same storms reach GPS, radio and the power grid, each its own way. What this episode is careful about: the seventeen hours between Carrington's flash and the great display of 1859 come from a later study (Green and Boardsen, 2005); it links the two in time and tracks nothing in between. The heights of the colors are broad, overlapping guides, not layers. NOAA's G-scale places are typical examples, not a promise for any town, and the Kp index measures magnetic disturbance, not brightness. The sunspot figure is our own calculation from NOAA's series, not an official word on where the cycle stands now. The images are archival, from 1859 to 2024; none of them shows October 10, 2026. Arthur and George are AI-voiced characters. Phil writes and researches every episode. Chapters0:00 A flash in 18591:17 Two clocks from the Sun3:01 The long way round5:03 Why green, why red7:37 The tenth of October, by the numbers10:49 The eye and the camera11:31 The Sun's busy years12:15 What else a storm touches13:30 Close Sources (selected)- R. C. Carrington, report of September 1, 1859 (Monthly Notices of the RAS): https://articles.adsabs.harvard.edu/pdf/1859MNRAS..20...13C- J. L. Green and S. Boardsen, Duration and Extent of the Great Auroral Storm of 1859 (2005): https://ntrs.nasa.gov/api/citations/20050212156/downloads/20050212156.pdf- NOAA SWPC weekly report, archived at NCEI (issued October 12, 2026): https://www.ngdc.noaa.gov/stp/space-weather/swpc-products/weekly_reports/PRFs_of_SGD/2026/10/prf2667.pdf- NOAA SWPC, planetary K-index: https://www.swpc.noaa.gov/products/planetary-k-index- NOAA SWPC, space weather scales: https://www.swpc.noaa.gov/noaa-scales-explanation- NOAA SWPC, aurora: https://www.swpc.noaa.gov/phenomena/aurora- NOAA SWPC, aurora 30-minute forecast (OVATION): https://www.swpc.noaa.gov/products/aurora-30-minute-forecast- NOAA SWPC, coronal mass ejections: https://www.swpc.noaa.gov/phenomena/coronal-mass-ejections- NOAA SWPC, GPS, HF radio and power grid pages: https://www.swpc.noaa.gov/impacts/space-weather-and-gps-systems- NASA, five questions about space weather: https://www.nasa.gov/technology/five-questions-about-space-weather-and-its-effects-on-earth-answered/- NASA, auroras: https://science.nasa.gov/sun/auroras/- NASA and NOAA, the Sun reaches its solar maximum period (October 15, 2024): https://science.nasa.gov/science-research/heliophysics/nasa-noaa-sun-reaches-maximum-phase-in-11-year-solar-cycle/- NASA, the May 2024 storm: https://science.nasa.gov/science-research/heliophysics/how-nasa-tracked-the-most-intense-solar-storm-in-decades/- NASA, STEVE (2020): https://www.nasa.gov/science-research/heliophysics/aurora-chasing-citizen-scientists-help-discover-a-new-feature-of-steve/- R. Pfaff, auroral physics review (NASA technical report): https://ntrs.nasa.gov/api/citations/20140000895/downloads/20140000895.pdf- Whiter and colleagues, camera study of auroral heights (Annales Geophysicae, 2023): https://angeo.copernicus.org/articles/41/1/2023/ Images- Carrington's sketch of September 1, 1859: R. C. Carrington; reproduction via U.S. Geological Survey (public domain)- The Sun in extreme ultraviolet, October 3, 2024 (colors assigned): NASA/SDO- Data-based visualization of a dayside event, October 16, 2015: NASA's Scientific Visualization Studio; Tom Bridgman- Aurora australis over the Indian Ocean, August 11, 2024: NASA, ISS Expedition 71- Aurora over Poker Flat, Alaska, night of February 16, 2017: NASA/Terry Zaperach- "Aurora with STEVE", Columbia Hills, Washington, March 23, 2023: The Modern Polymath, via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Aurora_with_STEVE.jpg), licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Changes: cropped, scaled, caption added.- Aurora from orbit, May 11, 2024, 08:20 UTC (grayscale sensor view): NASA Earth Observatory/Wanmei Liang; VIIRS day-night band data, Suomi NPP- The visible Sun, December 2019 and August 2024: NASA/SDONASA images are used under NASA's media guidelines; NASA does not endorse this channel. Diagrams are drawn for this episode. Drive and Listen — stories for your drive.Tuesdays: Case Files. Wednesdays: The Week. Thursdays: Tech. Business and sponsorship inquiries: winterfallplanning@gmail.com Watch on YouTube: https://youtu.be/q-BHK0R6tQM