Earthquake Bulletins and Catalogs at the USGS National Earthquake Information Center
Figure 2. Analysts locating an earthquake ca. 1965, and in 2000. Note that the compass in the 2000 photo is the same as the one being used in 1965 and was an integral part of the NEIC Y2K Contingency Plan.
Figure 3. Logarithmic plot of the number of globally located earthquakes versus the magnitude for the year 1998.