Rubuta ci gaba ga wannan sakin layi - Geologically, El Centro girgizar kasa na 1940 a kan Mercalli tsanani sikelin. Wannan ita ce girgizar ƙasa ta farko da aka yi rikodin ta wurin na'urar da ake kira seismograph da ke kusa da wani wurin da girgizar ƙasa ta yi ɓarna. An yi nazari sosai ta hanyar injiniyoyi na gine-gine kuma an ɗauka cewa yana da kyau har sai da girgizar kasa ta Northridge ta 1994
Ka yi haƙuri. A cikin wannan yanki, ilimin geology ya mamaye sauyin iyakar tectonic plate daga rift zuwa transverse fault. Yankunan kudancin San Andreas Fault suna haɗuwa da mafi girman arewacin Gabashin Pacific Rise. Sakamakon haka, yankin yana fuskantar girgizar ƙasa, kuma ana shimfiɗa farfajiyar ƙasa, wanda hakan ke haifar da nutsewar ƙasa a cikin lokaci.