Methods and instruments of nonlinear seismology for reducing of seismic vulnerability
by
Oleg B. Khavroshkin
Head of Origin and Comparative Study of the Earth and Planets Laboratory of Schmidt Institute of Physics of the Earth RAS
Coauthors: V.V. Tsyplakov, N.A. Vidmont

Elimination of human losses is the main and immediate task in the seismic vulnerability problem. We suggest the ways of development of seismic research and discussion of defense problems for reducing of seismic vulnerability. It is the ways of nonlinear seismology region.

Unconditionally seism zoning and the theory of catastrophes allow reduce human losses and building destruction. But well-known isoseists are the private case of caustic catastrophe theory or seismo-acoustics, so seism zoning can be amounted to 6 elementary catastrophe forms. It will better help to predict seismic actions.

The short-time local prediction of seismic events is general method for strong reducing of human losses. This method takes into account chaotic properties of stress fields and waves and the peculiarities of urban area. It bases on the natural seismo-emission phenomenon and is realized by long-time monitoring, which gives statistically and geographically continuous picture (chart) of seismic noise level inside geologic media. The instruments of this strategy are shock- and pressure- proofed seismometers for long-time monitoring and control the state of geological media including underwater shelf areas.

We think that the active protecting for cities and buildings as the best modern form of people safety consists in stress discharge of geologic media. Ultrasonic wave defense includes and bases on strong interaction between powerful waves from earthquake and ultrasonic wave train.

We want to point out that the technical objects may be used for the investigation of earthquakes induced and some reasons of seismic vulnerability.

Also reducing of seismic vulnerability contain as component kinetic acting on volcano at the pre-explosive stage.

The interesting and important aspect of defense problem is observation of the inharmonic wave processes in the soil and quasi-constant forces as the nearest seismic analogue of radiation forces in nonlinear acoustics under powerful earthquake seismic tremor.

Date received: July 9, 2004

Copyright © 2004 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # caon-06.