Earthquake Mechanics in the Central United States

Science  21 Jun 1974:
Vol. 184, Issue 4143, pp. 1285-1287
DOI: 10.1126/science.184.4143.1285


Focal mechanism solutions of earthquakes in the central United States suggest that local stress fields are important in determining the type and orientation of faulting. The implied stress system is considerably more complicated than that which would be produced by east-west trending compressive stresses, as previously suggested for this region.