Wayne.B wrote:


I would conjecture that something like a large meteorite hitting the
water offshore could create a similar effect. The successive waves
of high and low water would be the outward spreading rings from the
impact, similar to that created by a stone thrown into the water. The
outer approaches to Boothbay Harbor may have served to focus and
intensify the waves in some way.

Good thought. Large meteorites aren't detectable by any means known to
modern man.