In a recent paper, Bendick and Bilham (2001) neatly show that the Himalayan arc (Fig. 1A) forms a small circle with a radius of 1696 ± 55 km centered at long 91.6 ± 1.6°E and lat 42.4 ± 2.1°N regardless of whether orogen-perpendicular earthquakes, topography, drainage pattern, stress state, maximum horizontal strain rate, or a peak in the vertical velocity field define the arc. This newly calculated small circle is well within error of previous calculations (e.g., Klootwijk et al., 1985), but nicely illustrates that the small circle can be calculated both from features directly caused by...

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