Scientists track solar cycles by counting sunspots -- cool planet-sized areas on the Sun where intense magnetic loops poke through the star's visible surface.
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What is the sunspot number? Updated 10 May 2024. Spotless Days Current Stretch: 0 days 2024 total: 0 days (0%) 2023 ...
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A range of heliographic longitudes in either the northern or southern solar hemisphere (seldom both at the same time) containing one or more large and complex ...
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... MobileGlossary.html 26-Mar-2014 01:50 2611 NEAs.html 26-Mar-2014 01:49 412 WS_FTP.LOG 21-Jan-2001 01:07 6766 aphelion.html 03-Jul-2008 19:39 9801 bakeout ...
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HF propagation anomalies due to ionospheric changes resulting from solar FLAREs, PROTON EVENTs and GEOMAGNETIC STORMs. SUNSPOT. An area seen as a dark spot on ...
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This figure shows a series of solar flares detected by NOAA satellites in July 2000: Each category for x-ray flares has nine subdivisions ranging from, e.g., C1 ...
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Total sunspot number · Daily Estimated Sunspot Number · Hemispheric sunspot numbers · Legal Notices · User account menu · Information · Recent Posts · Contact SIDC.
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Sunspot Plotter. The sunspot plotter is easy to use. For example, select your birth date from the pull-down menus and the plotter instantly shifts to the ...
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