METHOD FOR RAPID PREDICTION OF EARTHQUAKES AND APPARATUS FOR REALISING SAID METHOD Russian patent published in 2014 - IPC G01V7/10 

FIELD: physics.

SUBSTANCE: pairs of gravitational variometers, turned in the azimuth relative each other by an angle which is not a multiple of 90°, are mounted. The pairs of variometers are mounted on at least three seismic stations from which directions to the earthquake source and points of intersection of said directions are determined. The moment in time when torque in each variometer changes is measured. When the torque in each variometer changes, oscillating angles of the torsional system relative horizontal axes are measured. Values of the arc tangent of their ratio and the resultant amplitude of the angle are calculated. The direction towards the earthquake source is determined from the averaged arc tangent value. The apparatus for implementing the present method has in each gravitational variometer a torsional system with a dumbbell yoke, sensors (4) for measuring oscillation angles thereof relative three axes and sensors (5) for measuring the moment of the system for measuring torque relative the vertical axis. Each pair of gravitational variometers also includes a computing device (7). Outputs of the computing device (7) are connected to outputs of the angle sensors (4) and inputs of sensors (5) of the moment of the gravitational variometers.

EFFECT: high accuracy of rapid notification of the point of the source an imminent earthquake.

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