I've been monitoring the NASA sunspot cycle projections. At the beginning of February, Hathaway had the model being that Cycle 24 would peak in 2014 at a level close to 100. Last week, on Feb 16, he updated his model to predict the peak occurring in 2013 at a level around 65.
Looking at the trends (and it will take another three months of observations to be sure it's not a blip), it might be the case that we ALREADY had the peak, and this is an unusual short cycle.
