In 1964, the largest earthquake ever recorded in North America rocked Alaska with 200,000 megatons of concentrated might, the equivalent of 2,000 nuclear bombs. Almost 3,000 miles away in Texas, water sloshed out of swimming pools. A street in Anchorage fell twenty feet. The quake devastated 24,000 square miles of wilderness, much of it glaciated. And what effect did all this might have on Alaska's glaciers? None.