N'October 11, 1918, ala ọma jijiji kpara mkpamkpa n'ebe ọdịda anyanwụ nke ụsọ oké osimiri nke Puerto Rico
nke mere ka e nwee ala ọma jijiji. Ala ọma jijiji nke afọ 1918 bụ n'ihi mmebi ochie nke akụkụ aka ekpe nke dị nso na Mona Passage. Na 1953, ala ọma jijiji mere na Santo Domingo, Dominican Republic. Mpaghara mmiri ahụ n'onwe ya (Puerto Rico Trench) emebibeghị n'ime ihe karịrị afọ 200, nke bụ nchegbu dị ukwuu nye ndị ọkà mmụta banyere mbara ala, ebe ha kwenyere na ọ nwere ike ịbụ n'ihi nnukwu ihe omume.