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‘The Earthquake Observatory’ a movie on the study of earthquakes, is now available. The movie was made by the Department of Geology and Geophysics at the Seismographic Station, University of California, Berkeley, in the summer of 1970. The 16 mm color sound movie, which lasts 26 minutes, is designed as a visual teaching aid to introduce undergraduate students in geology, geophysics, physics and earthquake engineering to the work of a modern seismological observatory. The movie concerns the history of recording earthquakes, methods of locating earthquakes, workings of the seismograph, types of seismic waves, the relation between faulting and fault creep and earthquakes, and the study of the earth's interior using observatory records.