Reverse Polarity Sunspots appear on the Sun – ending a 39 day stretch of spotless days

Dr. Tony Phillips writes: A new solar cycle is coming. Today, two sunspots emerged on the solar disk. Their reversed magnetic polarity marks them as members of new Solar Cycle 25. This quickening of new-cycle solar activity suggests that the sun is not entering a new Maunder Minimum despite the recent scarcity of sunspots. Today,…

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Solar Update December 2019

David Archibald We are well into the Solar Cycle 24/25 minimum but 24 may not have ended yet. A solar cycle isn’t over until the heliospheric current sheet has flattened. And that could be as late as March 2021. Solar cycle amplitude does matter with respect to climate and the amplitude of Solar Cycle 25,…

NASA’s SDO Sees New Kind of Magnetic Explosion on Sun

from NASA Dec. 17, 2019 NASA’s Solar Dynamics Observatory has observed a magnetic explosion the likes of which have never been seen before. In the scorching upper reaches of the Sun’s atmosphere, a prominence — a large loop of material launched by an eruption on the solar surface — started falling back to the surface…

Deep solar minimum on the verge of an historic milestone

Guest post by Paul Dorian Daily observations of the number of sunspots since 1 January 1900 according to Solar Influences Data Analysis Center (SIDC). The thin blue line indicates the daily sunspot number, while the dark blue line indicates the running annual average. The recent low sunspot activity is clearly reflected in the recent low…

Quiet sun sets new record for spotless days

As of November 1st, the current stretch of days without any observable sunspots in solar cycle 24 has reached a total of 228 spotless days in 2019 so far That’s 75% of the year so far. During the 2008 solar minimum, there were 268 days without sunspots, or 73% of the year. Here’s a tally of spotless…

25 for 25

Guest post by David Archibald Back on March 7, 2006, the National Science Foundation issued a press release predicting that the amplitude of Solar Cycle 24 would be “30 to 50 percent stronger” than Solar Cycle 23. Solar Cycle 23 had a smoothed maximum amplitude of 180.3. The press release described the forecast as “unprecedented”.…

Solar Update July 2019

Guest Post by David Archibald The two major items of interest are the likely month of minimum in the Solar Cycle 24 – 25 transition and the likely amplitude of Solar Cycle 25. The latter can be derived from the solar polar magnetic field strength. Figure 1 following indicates that 25 is likely to be…