Cosmic string passage through the Earth and consequent global earthquake

Effects invoked by the passage of the cosmic string through the Earth are investigated. The cosmic string induces global oscillations of the Earth whose amplitude and acceleration both linearly depend on the string line density. For the line density maximally allowed by the cosmic observations, the oscillations are perceivable even to human beings and may cause serious damages to the environment. On the other hand, the string with much smaller line density causes no visible effects. Yet, the sophisticated accelerograph is sensitive to a line density down to ten orders of magnitude smaller than the cosmologically relevant value.