Chịkọta isiokwu ahụ:  Ndị ọkà mmụta sayensị ji nnọọ n'aka na oké ala ọma jijiji ga-eme na California n'ime afọ 30 na-abịanụ. Ugbu a ha na-ekwu na ihe ize ndụ nke nnukwu ala ọma jijiji bụ ihe ọzọ yiri ka karịa na mbụ chere. O yikarịrị ka ala ọma jijiji nke ike ya ruru 8 ga-eme na steeti ahụ n'ime iri afọ atọ na-abịanụ si na pasent 4.7 gbagoo ruo pasent 7, n'ihi na ndị ọkà mmụta sayensị weere na ọ ga-ekwe omume na ọtụtụ mmebi nwere ike ịma jijiji n'otu oge, na-ewepụta ike ala ọma jijiji nke na-eweta mbibi ka ukwuu. Ọ bụ ezie na ihe ize ndụ nke nnukwu ala ọma jijiji dị elu karịa atụmatụ ndị gara aga, o yikarịrị ka - karịa ohere 99 pasent - na California ga-ama jijiji site na nnukwu 6.7 dị ka ọdachi Northridge nke 1994. Akụkọ ọhụrụ nke Ụlọ Ọrụ Na-enyocha Ọdịdị Ime Ala nke United States mere ka o nwekwuo ike ịbụ na ala ọma jijiji nke ịdị ukwuu ya ruru 8, ga-eme na California n'ime afọ 30 na-abịanụ. N'elu, foto nke overpass nke dara n'afọ 1994 mgbe ala ọma jijiji nke 6.7 Northridge mere. Ohere nke ala ọma jijiji nke Northridge dị elu na Northern California karịa Southern California - pasent 95 megide pasent 93, dị ka akụkọ nke U.S. Geological Survey wepụtara na Tuesday si kwuo. 'California bụ obodo ala ọma jijiji na-eme, ndị bi na ya kwesịrị ibi ndụ kwa ụbọchị dị ka a ga-asị na ọ bụ ụbọchị nke nnukwu ala ọma jijiji,' ka USGS geophysicist na onye edemede bụ Ned Field kwuru. Ngụkọta oge ala ọma jijiji ndị kasị ọhụrụ na-egosipụta n'ụzọ dị ukwuu ihe ndị USGS chọpụtara na mbụ n'afọ 2008. N'oge ahụ, ndị ọkà mmụta sayensị chọpụtakwara na ala ọma jijiji ga-eme na California ga-eme ka ala ọma jijiji dị ka nke ahụ mere na Northridge mee. Akụkọ ọhụrụ ahụ gụnyere mpaghara mmebi a chọpụtara ọhụrụ na ohere na ala ọma jijiji pụrụ isi n'otu mmebi banye n'ọzọ. N'ihi ihe ọmụma a, ohere e nwere na a ga-enwe ala ọma jijiji dị oké njọ - nke ịdị ukwuu ya ruru 8 ma ọ bụ karịa - n'ime afọ 30 sochirinụ mụbara. Enwere ohere pasentị iri itoolu na atọ nke oke 7 ma ọ bụ karịa na-eme n'otu oge ahụ na ohere pasentị iri anọ na asatọ nke oke 7.5 - yiri atụmatụ ndị gara aga. Ọtụtụ puku ala ọma jijiji na-eme kwa afọ na California, nke dị n'agbata nnukwu efere abụọ nke ụwa, Pacific na North...
Akụkọ ọhụrụ nke U.S. Geological Survey na-amụba ohere nke ala ọma jijiji nke ogo 8 n'ime iri afọ atọ na-abịanụ ruo pasent 7, site na pasent 4.7.