Declining Solar Activity

BOB HOYE In the 1990s, solar physicists, Penn and Livingston, called for a long decline in solar activity. This is the case and it is nice to see such work confirmed by events. Solar Cycles # 23 and 24 are the weakest since the early 1900s. The current run of consecutive Spotless Days is out…

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Amid the dimmest Sun since 1978 – a month without sunspots

The sun today is cue-ball blank, a perfect unmarred sphere: The sun has just passed an entire calendar month with no sunspots. The last time this happened, in August 2008, the sun was in the nadir of a century-class Solar Minimum. The current stretch of blank suns shows that Solar Minimum has returned, and it…

Study: A Solar Signature in Many Climate Indices

Abstract Jean‐Louis Le MouëlFernand LopesVincent Courtillot We first apply singular spectrum analysis (SSA) to the international sunspot number (ISSN; 1849‐2015) and the count of polar faculae (PF; 1906‐2006). The SSA method finds 22, 11 and 5.5‐year components as the first eigenvectors of these solar activity proxies. We next apply SSA to the ten Madden‐Julian oscillation…

Weak Solar Cycle: Cosmic rays increase 4th year in a row

Increased exposure for airline travelers at high altitudes. New data released by the Earth to Sky Calculus/Spaceweather.com high-altitude ballooning program show that atmospheric cosmic rays are intensifying for the 4th year in a row–an ironic side-effect of the decaying solar cycle. The new results are of interest to everyone from astronauts to air travelers. This…

October 2013 Sunspots: Largest jump in Solar cycle 24 so far

Looks like a double peak for cycle 24 is forming As many WUWT readers have noted in comments, October 2013 has been significantly more active than the previous several months, and we have not seen this level of activity since October 2011. At right, is the sun today showing several sunspots of significant size. No…

Solar Cycle 24 Update

Guest essay by David Archibald Recently, a number of newspaper articles spoke of the potential of cycle 25 to be   “Weakest Solar Cycle In Almost 200 Years”. “We’re in a new age of solar physics,” said David Hathaway of NASA’s Marshall Space Flight Center in Huntsville, Alabama. Here is a collection of solar measurements that…