Thankfully, zero to minimal damage in Jamaica, Cuba, the Cayman Islands, the Dominican Republic, and anywhere else it was felt.
And, fortunately there were no appreciable tsunami waves anywhere. I read an online article that a 0.40 ft. tsunami wave was recorded on Grand Cayman...that’s approx. 4.75 inches, so how is it distinguishable from any other typical wave...? The pattern/wavelength, I guess...?
The highest point on Grand Cayman is a mere 59 feet above sea level, whereas the island of Jamaica is mostly mountains, and the highest peak is 7,402 feet above sea level. Having been to both twice, I prefer Grand Cayman to Jamaica, so far, but probably not tsunami-wise.
Ultimately, I’m just glad there were no deaths or major injuries, and minimal damage from a 7.7 magnitude quake.