Mezue ahịrịokwu na-esonụ: Pacoima Dam guzogidere, ma merụrụ ahụ site na nnukwu ike (&gt; 1 "g") ala na-agagharị nke mere n'oge abụọ
Ala ọma jijiji nke San Fernando nke 1971 na nke Northridge nke 1994. N'ihi nchegbu banyere nkwụsi ike nke mgbochi mmiri na karịsịa mmeghachi omume ya na ala ọma jijiji ndị nwere ike ime n'ọdịnihu, County nke Los Angeles, na nkwado teknụzụ nke USGS, malitere nyochaa mgbochi mmiri site na iji GPS na-aga n'ihu.