The outer ring represents the Earth. The inner circle represents the Earth's core, both solid and liquid. The square is a standard indication of protection in crop circles. In this case it protects the four chastising comets from interference by humans as the comets disturb the Earth's core. Each of the four lenses represents the additional light created by each comet as it descends through the atmosphere to final impact. The four are connected together to indicate they are intrinsically related to each other rather than of independent origin. Also, the square may indicate that Ireland, a country with no reported crop circles, will not be significantly affected by the comet strikes.

Kenneth Heck