Geological aspects of the May 31, 1970, Perú earthquake Plafker, George ; Ericksen, George E. ; Fernández Concha, Jaime Abstract Publication: The Bulletin of the Seismological Society of America Pub Date: June 1971 DOI: 10.1785/BSSA0610030543 Bibcode: 1971BuSSA..61..543P