Cika jumla mai zuwa: Misalan girgizar ƙasa na ciki sun haɗa da waɗanda ke cikin Ma'adinai, Virginia a
2011 (ƙididdigar girman 5.8), New Madrid a 1811 da 1812 (ƙididdigar girman har zuwa 8.1), girgizar Boston (Cape Ann) na 1755 (ƙididdigar girman 6.0 zuwa 6.3), girgizar ƙasa da aka ji a Birnin New York a 1737 da 1884 (duka girgizar ƙasa da aka kiyasta a kusan girman 5.5), da girgizar ƙasa ta Charleston a South Carolina a 1886 (ƙididdigar girman 6.5 zuwa 7.3). Girgizar Charleston ta kasance abin mamaki musamman domin, ba kamar Boston da New York ba, yankin ba shi da tarihin ko da ƙananan girgizar ƙasa.