Prediction of great seismic waves by gravitational wave detectors. II. Noise and sensitivity of detectors

The prediction of a large seismic wave can be done according to gravitational field turbulence, which travels at the speed of light. The authors describe the sensitivity and noise of the corresponding gravitational wave detector. When an earthquake has a magnitude of seven, the gravitational deviation induces a detectable strain in the antenna bar. Accordingly, seismic waves can be detected by a gravitational wave antenna before their arrival and therefore be used in the prediction. Assuming a large earthquake with a 100 km epicenter distance from a city, the seismic waves take at least 14 s to arrive at the city. If people in the city had foreknowledge of the earthquake by observing the gravitational field turbulence generated by the seismic waves, they would be warned of the arrival before the seismic waves approached half the distance, and would be able to take emergency actions, at least 7 s before their arrival