In connection with identification of VLF emissions before L'Aquila earthquake

TL;DR

This paper evaluates a theoretical model explaining VLF electromagnetic emissions as precursors to earthquakes, using retrospective data from the L'Aquila event and others to improve earthquake prediction methods.

Contribution

It introduces a simple model of self-generated seismo-electromagnetic oscillations that explains VLF emissions during earthquake preparation, aiding in prediction accuracy.

Findings

Frequency shifts from MHz to kHz align with fault formation models.

The MHD criterion helps distinguish Earth VLF emissions from magnetospheric signals.

The model shows promise for improving earthquake prediction accuracy.

Abstract

The present paper deals with an attempt to check up the theoretical model of self-generated seismo-electromagnetic oscillations of LAI system on the basis of retrospective data. Application of the offered simple model enables one to explain qualitatively the mechanism of VLF electromagnetic emission initiated in the process of an earthquake preparation. It is worth to pay attention to the fact that frequency changes from MHz to kHz in electromagnetic emission spectrum comes to a good agreement with avalanche-like unstable model of fault formation. L'Aquila earthquake taken as an example to isolate reliably the Earth VLF emission from the magnetospheric electromagnetic emission of the same frequency range, MHD criterion is offered together with geomagnetic activity indexes. On the basis of the considered three earthquakes, according to the opinion of authors the model of self-generated seismo-electromagnetic oscillations of the LAI system will enable us to approach the problem of resolution of earthquake prediction by certain accuracy.