Method uses the Ap geomagnetic index, which has been in a slump since October 2005: The Hockey Schtick tips us to a paper published today in Advances in Space Research…
Tag: Wolf number
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…
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.
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…
Counting Sunspots and Sunspot Inflation
Guest post by Dr. Leif Svalgaard The official sunspot number is issued by SIDC in Brussels http://sidc.be/sunspot-data/ . The [relative] sunspot number was introduced by Rudolf Wolf http://en.wikipedia.org/wiki/Rudolf_Wolf in the…
Solar Activity – Past, Present, Future
Essay/paper by Dr. Leif Svalgaard Abstract As our civilization depends increasingly on space-borne assets and on a delicate and vulnerable earth-bound infrastructure, solar activity and its potential impact becomes of…
Paper demonstrates solar activity was at a grand maximum in the late 20th century
Solar activity measured by isotope proxies revealed the end of 20th century was the highest activity in 1200 years A 2010 paper (that I somehow missed) was recently highlighted by…
A quiet cue ball sun
Source: http://sdo.gsfc.nasa.gov/assets/img/latest/latest_4096_4500.jpg A couple of people have noticed (as did I) that the sun is essentially blank.
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 cycle update for April – sun still slumping
Got a bit sidetracked earlier in the month, this is overdue for an update. Earlier we reported that Hathaway had updated his solar cycle prediction saying “…the predicted size makes…
NASA/Hathaway's updated solar cycle prediction – smallest in 100 years
…the predicted size makes this the smallest sunspot cycle in about 100 years (Updated 2012/05/01) From: http://solarscience.msfc.nasa.gov/predict.shtml The current prediction for Sunspot Cycle 24 gives a smoothed sunspot number maximum…
The sun is still in a funk: sunspot numbers are dropping when they should be rising
The sunspot number for February from SIDC is down again, to 33.1 Here’s the source of that data: http://sidc.oma.be/DATA/monthssn.dat So far, cycle 24 is significantly lower in SSN number that…
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…
The smallest sunspot cycle in two hundred years
I missed this earlier this week from NASA, I got a bit distracted with other things. Sixty two – that’s the new number from Hathaway on April 4th, have a…
The minimal solar activity in 2008–2009 and its implications for long‐term climate modeling
This is a new paper in Geophysical Research Letters by C. J. Schrijver, W. C. Livingston, T. N. Woods, and R. A. Mewaldt. WUWT readers may recognize Livingston as the…
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