Abstract
The global seismicity shows a characteristic distance of about 23°. The middle-deep and deep earthquakes in the European and Asian blocks concentrate on several zones which separate about 23° away from earch other. The shallow strong earthquakes (M s⩾7) form belts of over 20°, the ends of these belts are near the concentration points of middle-deep and deep earthuakes. The Circular Pacific island arcs, volcanoes, shallow earthquakes, middle deep and deep earthquakes also show the characteristic distance of about 23°.
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