The model of self-generated seismo-electromagnetic oscillations of the LAI system

Abstract

Abstract. Very low frequency (VLF) electromagnetic radiation (in diapason 1 kHz-1 MHz) in the atmosphere, generated during an earthquake preparation period, may be connected with the linear size characterising the expected earthquake focus. In order to argue this hypothesis, a very simple quasi-electrostatic model is used: the local VLF radiation may represent the self-generated (own) electromagnetic oscillations of interactive seismoactive segments of the lithosphere-atmosphere system. This model qualitatively explains the well-known precursor effects of earthquakes. In addition, using this model after diagnosing existing data makes it principally possible to forecast an expected earthquake with certain precision.As a physical basis of the working hypothesis is the atmospheric effect of polarization charges occurring in the surface layer of the Earth, it is possible to test the following constructed model in the Earth's crust, where the reason for polarization charge generation may be different from piezoelectric mechanism, e.g., some other mechanism.

Influence of seismic activity on the atmospheric electric field in Lisbon (Portugal) from 1955 to 1991

“…Since an important article by Pierce in the 1970's [Pierce 1976], many models have been developed to explore the coupling between the lithosphere-atmosphere-ionosphere during seismic events [e.g. Liperovsky et al 2008, Omori et al 2009, Harrison et al 2010, Kachakhidze et al 2011. All of these appear to agree that variations in the vertical component of the atmospheric electric field (Ez) are related to the amount of radon that emanates during earthquake preparation stages, which then promotes air ionization and reduces Ez.…”

“…Moreover, PG anomalies are not only candidates for seismic electromagnetic precursors in the context of shortterm earthquake prediction [Harrison et al 2010], as they also give important insights into the physics of these phenomena [Kachakhidze et al 2011]. Nevertheless, there has been little observational work carried out on this subject [e.g.…”