Abstract
Many theories of the earthquake are founded upon the hypothesis that earthquakes are produced by the occurrence of a fault, but the actual phenomena go against this hypothesis. If the hypothesis were correct, the radiation pattern ought to be shown as quadrant type, but many actual patterns are not; they are conical. So the author considers that the earthquakes are not produced by the occurrence of a fault but are produced by magma explosion in a magma pocket. In this paper two earthquakes are shown for examples.
