Kammala wannan jumla: A ranar 11 ga Oktoba, 1918, an yi wa gabar tekun yammacin Puerto Rico da
babbar girgizar kasa wadda ta haifar da tsunami. Girgizar kasa ta 1918 ta haifar da tsohuwar kuskuren hagu-gefe kusa da Mona Passage. A shekara ta 1953, girgizar ƙasa ta shafi Santo Domingo, Dominican Republic. Yankin subduction na ainihi (Puerto Rico Trench) bai fashe ba a cikin shekaru sama da 200, wanda shine babban abin damuwa ga masana ilimin ƙasa, saboda sun yi imanin cewa yana iya zama saboda babban abin da ya faru.