The predictions for solar cycle 24 have been plunging since the December 2006 prediction that it would be "one of the most intense cycles since record keeping began almost 400 years ago":
Dec. 21, 2006: Evidence is mounting: the next solar cycle is going to be a big one. Solar cycle 24, due to peak in 2010 or 2011 "looks like its going to be one of the most intense cycles since record-keeping began almost 400 years ago," says solar physicist David Hathaway of the Marshall Space Flight Center. He and colleague Robert Wilson presented this conclusion last week at the American Geophysical Union meeting in San Francisco.Animation of prior changes to Dr. Hathaway's solar cycle 24 predictions:
The predictions for Solar Cycle 24 have plummeted from "one of the most intense" to now one of the least intense cycles of the past 400 years. If the anemic activity continues, the sun may be entering a quiet phase similar to the Dalton Minimum, characterized by approximately 50 sunspots/month at the peak of the solar cycle.