"The results of the engineering studies and analyses which provide guidance on shear strength parameters applicable to the stability evaluation of existing slopes along the Gaillard Cut, the effects of future modifications, and evaluation of newly excavated slopes in clay shales are summarized in this report" (abstract). This report includes the appendices containing enginering data, characteristics of materials, analysis of past slides, active slopes, and hydrographic survey data.

Report discussing earthquake activity in the United States during 1962. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1961. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1960. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1959. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1958. The report is broken down by regions and has sections for specific earthquakes.

From introduction: This report is based on investigations carried on by the Geological Survey (U. S. Department of the Interior) under the auspices of the Interdepartmental Committee on Scientific and Cultural Cooperation (U. S. Department of State) and the Foreign Economic Administration. The function of the last two agencies is presently carried on by the International Cooperation Administration. Roberts is responsible for the text of this report and for the compilation of the geologic map. He was in Central America from January to April 1942 under a program of scientific and technical cooperation with the American Republics sponsored by the Department of State, and mapped manganese deposits in Costa Rica and manganese and antimony deposits in Honduras.

Report discussing earthquake activity in the United States during 1957. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1956. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1955. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1954. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1953. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1952. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1951. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1950. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1949. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1948. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1947. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1946. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1945. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1944. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1943. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1942. The report is broken down by regions and has sections for specific earthquakes.

Report discussing earthquake activity in the United States during 1941. The report is broken down by regions and has sections for specific earthquakes.