Flinn-Engdahl regionalization

The Flinn-Engdahl regions (or F-E regions) comprise a set of contiguous seismic zones which cover the Earth's surface.

The scheme was proposed in 1965[1] by Edward A. Flinn and E. R. Engdahl.

[3] Since that time, region outlines and numbers have remained unchanged, but region names have changed to reflect official place name changes, e.g. the Queen Charlotte Islands have been known as Haida Gwaii since 2010.

Because each F-E region is composed of 1x1 degree blocks with integer latitudes and longitudes, the borders of the F-E regions may differ from political boundaries.

For instance, the F-E region 545 ("Northern Italy") also includes parts of France, Switzerland, Austria and Slovenia.

Flinn-Engdahl regions of Presgrave, Aichele, Wiens & Flinn (1996) in pink, with region numbers in red, shown against coastlines in blue and administrative boundaries in black and grey.