TY - RPRT TI - Southern California Seismographic Network; report to the U.S. Geological Survey, August 21, 1990 AU - Egill Hauksson AU - L.M. Jones AU - J.J. Mori AU - R.W. Clayton AU - T. H. Heaton AU - Hiroo Kanamori AU - D.V. Helmberger PY - 1991 DO - 10.3133/ofr9138 UR - https://pubs.usgs.gov/publication/ofr9138 ID - ofr9138 ER -