The December 25, 1961, Earthquakes in Northwestern Missouri and Northeastern Kansas

Abstract

On December 25, 1961, at 6:20 a.m. and at 7:00 a.m., northwestern Missouri and northeastern Kansas felt the effects of earthquakes centering approximately 8 km (5 mi) north of Excelsior Springs, Missouri. The shocks originated at depths of 20 to 30 km (12 to 18 mi), within the continental granitic layer. The intensity of the second and stronger shock was V. Motion of individuals and objects was perceptible, but damage was limited to minor cracking of plaster.