Mezue ahịrịokwu na-esonụ: Mmiri Pacoima guzogidere, ma e mebiri ya site na nnukwu ike (&gt; 1 "g") nke ala nke mere n'oge 1971 San Fernando na
Ala ọma jijiji ndị mere na Northridge n'afọ 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.