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…

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,…

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…

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…

Leif Svalgaard at AGU on the Current Solar Cycle: ‘None of us alive have ever seen such a weak cycle’

WUWT’s resident solar expert Dr. Leif Svalgaard (and others) says  ‘None of us alive have ever seen such a weak cycle’  and the panel he was on talk about the…

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,…

Like 'the pause' in surface temperatures, 'the slump' in solar activity continues

The NOAA Space Weather Prediction Center has updated their monthly graph set and it is becoming even more clear that we are past solar max, and that solar max has…

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…

Newsbytes: Sunspot Enigma – Will Inactive Sun Cause Global Cooling?

 From Dr. Benny Peiser and the GWPF We Really Don’t Understand Our Climate Something is happening to our sun. If history is anything to go by, the sun’s change of…

The solar cycle is still slumping

It is looking more and more like a double sunspot peak for solar cycle 24. Sunspot count is down again:  A similar drop occurred in radio flux.

CET cooling in line with solar model prediction

Yesterday, WUWT carried the headline: Coldest Spring In England Since 1891.  This essay offers what could be an explanation for it. Judge for yourself. – Anthony Guest essay by David…

February solar data shows the Sun to still be slumping – but NASA says 'twin peaks' may happen

The data from SWPC is in, and it is lethargic at best. Sunspot numbers took a hit, down to about 42,  a delta of ~50 lower compared to the red…

How long to the 24/25 solar minimum?

Guest post by David Archibald Climate has real world consequences, and those operating in fields that will be affected by changing climate bring a different perspective to the problem of…

Solar Update February 2013

Guest post by David Archibald Solar Cycle 24 has already seen five consecutive colder winters. This is a link to a post about a German meteorologist who has seen the…

December solar activity in a big slump

The December data from NOAA’s Space Weather Prediction Center is in, and it looks more and more like the peak of solar cycle 24 has been reached, and that we…

Our current solar cycle 24 – still in a slump – solar max reached?

Have we hit solar max? NOAA’s SWPC recently updated their solar metrics graphs, and it seems to me like we may have topped out for solar cycle 24. There doesn’t…

When will it start cooling?

Guest post by David Archibald My papers and those of Jan-Erik Solheim et al predict a significant cooling over Solar Cycle 24 relative to Solar Cycle 23. Solheim’s model predicts…

NASA June 2012 Solar Cycle 24 Prediction

Compiled by Joe D’aleo WeatherBell via NASA MSFC The current prediction for Sunspot Cycle 24 gives a smoothed sunspot number maximum of about 60 in the Spring of 2013. We…

Solar Update March 2012

by David Archibald Figure 1: Heliospheric Current Sheet Tilt Angle 1976 – 2012 The heliospheric current sheet tilt angle is currently at 67°. Solar maximum occurs when it reaches 74°…

Quantifying the Solar Cycle 24 Temperature Decline

Guest post by David Archibald Three wise Norwegians – Jan-Erik Solheim, Kjell Stordahl and Ole Humlum – have just published a paper entitled “The long sunspot cycle 23 predicts a…

First Estimate of Solar Cycle 25 Amplitude – may be the smallest in over 300 years

Guest post by David Archibald Predicting the amplitude of Solar Cycle 24 was a big business. Jan Janssens provides the most complete table of Solar Cycle 24 predictions at: http://users.telenet.be/j.janssens/SC24.html…

Solar Cycle 24 Length and Its Consequences

Guest post by David Archibald Solar Cycle 24 is now three years old and predictions of the date of solar maximum have settled upon mid-2013. For example, Jan Janssens has…

Hathaway's November Solar Prediction

By David Archibald Joe D’Aleo asked for my comments on NASA’s James Hathaway’s latest solar prediction, available here: http://solarscience.msfc.nasa.gov/predict.shtml When I read May 2013 for solar cycle maximum, I thought…

Big jumps in September solar activity metrics

NOAA’s Space weather prediction center released their solar cycle progression updates, and it shows one of the largest jumps for all common solar metrics since cycle 24 began. Of course…