There were several sunspot appearances this week. Sunspot numbers on April 25-29 were 11, 14, 12, 0 and 24, giving a weekly average of 8.7. Average daily solar flux changed from 69 to 69.2. Geomagnetic activity remains quiet, with average daily planetary A index declining from 7.3 to 5.6. On Thursday, new sunspot activity continued, […] Read more
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Today, there are two sunspots in the sun’s southern hemisphere. Their magnetic polarity reveals something interesting: They come from different solar cycles. Take a look at this magnetic map of the sun’s surface (with sunspots inset) from NASA’s Solar Dynamics Observatory: One sunspot (AR2760) belongs to old Solar Cycle 24, while the other (AR2761) belongs […] Read more
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Frank Donovan, W3LPL, notes that the National Oceanic and Atmospheric Administration (NOAA) Space Weather Prediction Center (SWPC) has published its official updated prediction of Solar Cycle 25 in new, interactive Solar Cycle Progression graphs. The updated prediction is based on the results of NOAA’s Solar Cycle 25 Prediction Panel. “SWPC forecasts a solar maximum between 105 […] Read more
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The first geomagnetic storm of 2020 (category G1) took forecasters by surprise on April 20th when a CME hit Earth’s magnetic field, sparking bright auroras over Canada and some northern-tier US states. “Northern lights danced across the entire northwestern Montana sky early this morning,” reports Philip Granrud. “I photographed them with a wide angle lens on top of […] Read more
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Contester, DXer, and solar watcher Frank Donovan, W3LPL, said, “Some of us have noticed a slight uptick in solar activity since Christmas Eve, when two Solar Cycle 25 spots — AR 2753 and AR 2754 — appeared. Only one of the five subsequent sunspots — AR 2757 — has been from cycle 24. All of the […] Read more
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These incredible images show the Sun in “ultra high resolution” for the first time. British researchers have collaborated with NASA to unveil the images, the highest-ever resolution. The images, analysed by researchers at the University of Central Lancashire (UCLan) and NASA’s Marshall Space Flight Centre, provide astronomers with a better understanding of the Sun’s complex atmosphere. Until now, certain parts […] Read more
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A new sunspot appeared on the last day in March and the first days of April, with daily sunspot numbers of 12, 13 and 12. Total sunspot area increased on each day from 10 to 20 to 30 millionths of a solar hemisphere. Fortunately, this was a Cycle 25 spot, according to the magnetic signature. […] Read more
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