This article develops the ideas presented in the previous article, justifying the project proposed to determine the epicenter of a future short-focus earthquake tens of hours before the earthquake and the project to reduce the magnitude of an impending catastrophic earthquake. A physical and mathematical model of the prototype of a mercury earthquake precursor sensor is proposed, and the signal received by the old sensor is calculated. Analysis of an existing sensor prototype provides an understanding of physical processes and shows the fundamental advantage of the new sensor. An approach is formulated to explain the physical mechanism for reducing the magnitude of an impending catastrophic earthquake. A vibrator described in the literature is considered, the effectiveness of which for reducing the magnitude of future catastrophic short-focus earthquakes is estimated by the calculations of the long time of the earthquake precursor. The requirements for future specialized vibrators for the purpose of Reducing the Magnitude of an Impending Catastrophic Earthquake are formulated.