Ku qor sii wadida cutubkan - Joseph Jordan Bognuda oo deggan Ferndale (2 Oktoobar 1889 Vacaville, California - 7 Janaayo 1979) wuxuu xiiseynayay dhulgariir ka dib markii uu soo maray San Francisco 1906
taasoo sababtay burbur baaxad leh oo ku dhacay Ferndale iyo guud ahaan dooxada Eel River. Bognuda wuxuu bilaabay waraaqaha Perry Byerly wuxuuna ka qeyb galay muxaadarooyinka Jaamacadda California ee Berkeley taas oo keentay in Jaamacadda iyo US Coast iyo Geodetic Survey ay aasaaseen Ferndale Seismographic Station oo leh seismograph Bosch-Omori oo ka fudud kan si firfircoon loogu isticmaalo Berkeley isla waqtigaas.