TY - RPRT TI - Low strain level acoustic emission due to seismic waves and tidal/thermoelastic strains observed at the San Francisco Presidio, California AU - B.H. Armstrong AU - C. M. Valdes-Gonzales AU - M. J. Johnston AU - J.D. Leaird PY - 1993 DO - 10.3133/ofr93583 UR - https://pubs.usgs.gov/publication/ofr93583 ID - ofr93583 ER -