Whakakihia te rerenga e whai ake nei: Nā tōna hītori ki te whakaputa i ngā ruu nui (1857,
1906) ko te wāhi arotahi o te aromatawai mōrearea ru i California ko te whiu-riri San Andreas Pūnaha o hapa. Heoi, ko te punaha o nga hapa, tae atu ki te Sierra Madre <unk> Cucamonga Fault System e rere ana i te rohe o te San Gabriel me San Fernando Valley, kua puta ano he raupapa o nga huihuinga nui ki te nui i te Greater Los Angeles Area. I pakaru te wāhanga ki te hauauru rawa o tēnei pūnaha hapa i te tau 1971, ā, kua tohua hei tētahi o ngā pūnaha hapa nui e ono e whakawehi ana i te rohe nui o te iwi.