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Abstract In this paper we present a detailed description of the system of geographical and seismic regionalization previously proposed by the authors (Flinn and Engdahl, 1965) and now widely used in seismological bulletins. Tables are given which show the geographical and seismic region numbers and names for each square degree of latitude and longitude on the Earth's surface. Listings of computer programs which store and retrieve the boundary information are included.
Flinn et al. (Sat,) studied this question.
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