Rubuta ci gaba don wannan sakin layi - Mafi mahimmancin siginar da ke sarrafa iyakar girgizar ƙasa a kan kuskure, duk da haka, ba shine mafi girman tsawon da ake da shi ba, amma faɗin da ake da shi saboda na ƙarshe ya bambanta ta hanyar factor 20. A gefen gefen faranti, kusurwar nutsewa na jirgin fashewa ba shi da zurfi, yawanci kusan digiri 10. Saboda haka, da nisa daga cikin jirgin sama a saman m crust na duniya zai iya zama (Japan, 2011
; Alaska, 1964), yin girgizar ƙasa mafi ƙarfi mai yiwuwa.