Ka cika wannan jumla: Puerto Rico tana kan iyaka tsakanin yankin Caribbean da na Arewacin Amirka. Wannan yana nufin cewa a halin yanzu ana lalata shi ta hanyar damuwa na tectonic wanda ya haifar da hulɗar waɗannan faranti. Wadannan damuwa na iya haifar da girgizar kasa da tsunamis. Waɗannan abubuwan girgizar ƙasa, tare da rushewar ƙasa, suna wakiltar wasu haɗarin haɗari na ƙasa a tsibirin da kuma a arewa maso gabashin Caribbean. Ƙungiyar
mafi girma, mafi yawan girgizar kasa da ta faru a ranar 11 ga Oktoba, 1918 kuma tana da kimanin girman 7.5 a kan sikelin Richter. Ya samo asali ne daga gabar Aguadilla kuma tsunami ya biyo baya. A ranar 24 ga Satumba, 2019 an yi girgizar kasa sama da 6.0 a nisan mil 49 daga arewa maso yammacin tsibirin a cikin zurfin nisan mil 6. Cibiyar Nazarin Kasa ta Amurka (USGS) ce ta rubuta shi.