More information and pictures are published here:
4 Wavespells form one Castle of 52 days.
The Castles are 5: Red, White, Blue, Yellow and Green.
The current Tzolkin began on 4th April 2015.
The elements on the crop circle have following meaning:
The 7th wavespell (the Blue Storm Wavespell) is depicted with a thinner line, because on 21st June 2015 this wavespell just begins, this is the 1st day of this wavespell.
The circle P on the pictogram symbolizes our Purpose (or complex of purposes).