TY - RPRT TI - Off-fault ground ruptures in the Santa Cruz Mountains, California: Ridge-top spreading versus tectonic extension during the 1989 Loma Prieta earthquake AU - Daniel J. Ponti AU - Ray E. Wells PY - 1991 DO - 10.1785/bssa0810051480 UR - https://pubs.usgs.gov/publication/70197522 ID - 70197522 ER -