-
1. Solar Cycle Progression - NOAA / NWS Space Weather …
Link: https://www.swpc.noaa.gov/products/solar-cycle-progression
Description: WEBThe observed and predicted Solar Cycle is depicted in Sunspot Number in the top graph and F10.7cm Radio Flux in the bottom graph. In both plots, the black line represents the monthly averaged data and the purple line represents a 13-month weighted, smoothed version of the monthly averaged data.
-
2. Solar cycle - Wikipedia
Link: https://en.m.wikipedia.org/wiki/Solar_cycle
Description: WEBThe solar cycle, also known as the solar magnetic activity cycle, sunspot cycle, or Schwabe cycle, is a nearly periodic 11-year change in the Sun's activity measured in terms of variations in the number of observed sunspots on the Sun's surface.
-
3. What Is the Solar Cycle? | NASA Space Place – NASA Science …
Link: https://spaceplace.nasa.gov/solar-cycles/en/
Description: WEBApr 11, 2024 · The beginning of a solar cycle is a solar minimum, or when the Sun has the least sunspots. Over time, solar activity—and the number of sunspots—increases. The middle of the solar cycle is the solar maximum, or when the Sun has the most sunspots. As the cycle ends, it fades back to the solar minimum and then a new cycle begins.
-
4. Solar cycle: What is it and why does it matter? | Space
Link: https://www.space.com/solar-cycle-frequency-prediction-facts
Description: WEBApr 25, 2022 · The solar cycle describes an approximately 11-year cycle of solar activity driven by the sun 's magnetic field and indicated by the frequency and intensity of sunspots visible on the...
-
5. Sunspots/Solar Cycle | NOAA / NWS Space Weather Prediction …
Link: https://www.spaceweather.gov/phenomena/sunspotssolar-cycle
Description: WEBSunspots/Solar Cycle. Sunspots are dark areas that become apparent at the Sun’s photosphere as a result of intense magnetic flux pushing up from further within the solar interior. Areas along this magnetic flux in the upper photosphere and chromosphere heat up, and usually become visible as faculae and plage – often times termed active regions.
-
6. Solar cycle | Definition, Length, & Facts | Britannica
Link: https://www.britannica.com/science/solar-cycle
Description: WEBsolar cycle, period of about 11 years in which fluctuations in the number and size of sunspots and solar prominences are repeated. Sunspot groups have a magnetic field with a north and a south pole, and, in each 11-year rise and fall, the same polarity leads in a given hemisphere while the opposite polarity leads in the other.
-
7. Solar Cycle 25 Is Here. NASA, NOAA Scientists Explain What …
Link: https://www.nasa.gov/news-release/solar-cycle-25-is-here-nasa-noaa-scientists-explain-what-that-means/
Description: WEBSep 15, 2020 · Scientists use sunspots to track solar cycle progress; the dark blotches on the Sun are associated with solar activity, often as the origins for giant explosions – such as solar flares or coronal mass ejections – which can …
-
8. Solar Cycle Progression and Forecast - NASA
Link: https://www.nasa.gov/solar-cycle-progression-and-forecast/
Description: WEBUpdated April 5, 2024. Sunspot Number Extended Forecast: Plot | Table. Sunspot Number Recent Observations: Table (Monthly & 13-Month Smoothed) Radio Flux (10.7 cm) Extended Forecast: Plot | Table (95 percentile) | Table (75 percentile) Radio Flux Recent Observations: Table (Monthly & 13-Month Smoothed)
-
9. Sunspots and Solar Flares - NASA Space Place
Link: https://spaceplace.nasa.gov/solar-activity/en/
Description: WEBApr 11, 2024 · The Short Answer: What are sunspots and solar flares? Sunspots are areas that appear dark on the surface of the Sun. They appear dark because they are cooler than other parts of the Sun’s surface. Solar flares are a sudden explosion of energy caused by tangling, crossing or reorganizing of magnetic field lines near sunspots.
-
10. 15.2: The Solar Cycle - Physics LibreTexts
Link: https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Astronomy_1e_(OpenStax)/15%3A_The_Sun-_A_Garden-Variety_Star/15.02%3A_The_Solar_Cycle
Description: WEBApr 11, 2022 · Describe the sunspot cycle and, more generally, the solar cycle. Explain how magnetism is the source of solar activity. Before the invention of the telescope, the Sun was thought to be an unchanging and perfect sphere. We now know that the Sun is in a perpetual state of change: its surface is a seething, bubbling cauldron of hot gas.
