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Earthquake forecast in Vrancea zone, Romania

C. CIUCU1,* , R.-A. AILENEI1

Affiliation

  1. University of Bucharest, Faculty of Physics, Magurele, Romania

Abstract

The paper refers to a method and system for determining the seismic precursors, which occur at very low frequencies of infrasound (2 mHz – 200 mHz) and electric currents at ground level, produced by vibrations of the crust as a result of tectonic stress that appears before a seism and the induction effect caused by the movement of the Earth in gravitational field. The result is a forecast of the place, time and magnitude of an earthquake in a range between 1 hour and 2 days before it occurs. The system and method for determining the seismic precursors based on infrasound is composed of sensors of infrasound, a piezoelectric membrane type (tectonic „eardrum”) and two pairs of electrodes with the purpose of measuring the electric field of the soil in a square corners. The two systems of measurement are complementary: mechanical vibrations of very low frequency are taken from earthly eardrum and associated electric field through the piezoelectric effect electrodes stuck in the ground. The method correlates filtered low-pass and band-pass electrical signals from two complementary systems of measuring thru a processing module. The data is transmitted via Internet to a computer analysis in order to determine the deformation, the vibrations of the Earth’s crust, preceding an earthquake and locating it according to the directions of propagation and frequency spectrum of waves at very low frequencies (2 mHz – 200 mHz)..

Keywords

Seismic prediction, Precursors, Infrasound, Electromagnetic field.

Submitted at: Jan. 28, 2010
Accepted at: May 26, 2010

Citation

C. CIUCU, R.-A. AILENEI, Earthquake forecast in Vrancea zone, Romania, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 5, pp. 1226-1230 (2010)