The crop lay of this circle suggests a man-made effort. This is Comet A with its two major fragments. The impact areas are shown at night since that is when Comet A strikes according to ZA GBR (91/07/00), pg. 76. of my free e-book ( http://theheckhypothesis.com/downloads.html  ). The outer discontinuous circle indicates the projected region of damage or destruction. Comet A, traveling from northwest to southeast, will impact in the Atlantic Ocean. One fragment will impact near Puerto Rico, and the other in the Gulf of Mexico.

Kenneth Heck

Reference

Fernando Ortolá