It has been a common practice to plot epicenters and hypocenters of earthquakes as symbols of equal size on geologic maps and cross-sections. Such plots can be highly effective. For instance, in regions dominated by high-angle faults, one can readily identify traces of seismically active faults by visually connecting dots that represent epicenters in map view. However, the practice lacks a clear physical basis and opens the door to arbitrary decisions regarding symbol sizes that could obscure important features in seismicity or even create misleading visual effects.

For example, Figures l B and 1C compare two renditions of the same...

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