Earthquake Hazards Reduction Act - Declares it to be the purpose of this Act to reduce the risks of life and property from future earthquakes in the United States through an effective earthquake hazards reduction program.

Directs the President to establish and direct to be maintained: (1) a coordinated National Earthquake Hazards Reduction Program; (2) an Office of Earthquake Hazards Reduction; (3) a National Advisory Committee on Earthquake Hazards Reduction; and (4) an Earthquake Prediction Evaluation Board. Requires the President to take prescribed steps with respect to the Administration of the Program.

Requires the participation in such program of specified Federal departments and agencies.

Provides that the earthquake hazards reduction program contain the following elements: (1) physical studies; (2) structural studies; (3) social, legal, and economic research; (4) implementation by applying acquired knowledge; and (5) other elements including studies of foreign experience and post-earthquake investigations.

Directs the President to submit an annual report to the Congress after the end of each fiscal year describing and evaluating any progress achieved in reducing the risks of earthquake hazards.

Authorizes specified sums to be appropriated for fiscal years 1977 through 1979 to carry out the provisions of this Act.

Earthquake Disaster Mitigation Act - Expresses the findings of Congress and declares the purpose of this Act in establishing a coordinated national program in earthquake mitigation.

Provides that the Director of the Geological Survey, in consultation with the National Science Foundation, shall develop and carry out a program of research and implementation in the areas of tectonics, seismology, geology, engineering, planning, and social sciences necessary to achieve the purposes of this Act, specifying the nature of such program.

States that the Director of the Geological Survey and the Director of the National Science Foundation, jointly, shall: (1) establish an advisory committee composed of representatives of the research community to review periodically the earthquake mitigation program and to recommend to the Directors, through periodic written reports, appropriate modifications in the conduct or emphasis of the program; (2) establish an information dissemination mechanism to make available in a timely manner information developed pursuant to this Act; (3) prepare and submit annual reports to the Congress on the progress of the program and achievements in earthquake mitigation; (4) establish a joint program to evaluate, synthesize, and present, through appropriate educational programs, the knowledge developed pursuant to this Act; and (5) assist the States in carrying out their responsibilities under the Disaster Relief Act of 1974 by making readily available the results of research conducted pursuant to this Act.

Authorizes the appropriation of $25,000,000 for fiscal year 1976 and the same amount for each of the following nine fiscal years.

Provides, under the National Science Foundation Act of 1950, for authorization of appropriations of $15,000,000 for fiscal year 1976 and $25,000,000 for each of the nine following fiscal years, for carrying out the duties of this Act.