 |
| Titel |
Problem of Identity of Acoustic and Electromagnetic Emission Area |
| VerfasserIn |
Ioseb Turazashvili, Nino Kachakhidze |
| Konferenz |
EGU General Assembly 2011
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250045665
|
|
|
|
|
|
| Zusammenfassung |
| Problem of Identity of Acoustic and Electromagnetic Emission Area
Ioseb T. Turazashvili, Manana K. Kachakhidze, Nino K. Kachakhidze
St. Andrew The First-Called Georgian University of The Patriarchy of Georgia
It is well-known that some electromagnetic emission and acoustic nose with very low
frequency (VLF) are fixed before earthquake quite often. In other words electromagnetic and
acoustic emissions take place and the main rezone of it is the changes in tectonic stress in
area of future earthquake.
These two events is very different from physical point of view and are considered as the
most effective indicators from possible earthquakes precursors. In spite of qualitative
differences there is relationship between electromagnetic and acoustic waves definitely. This
is revealed in many effects. One example is emission of magnetospheric - ionospheric very
low frequency and ultra low frequency (ULF) that are fixed as in electromagnetic so in
acoustic records.
The main goal of this work is to understand the mechanisms of electromagnetic and
acoustic emissions from the Earth to show possible common mechanical mechanism of their
generation. For this we will consider the model. The main basement of this model is
assumption of existence of some small cavities in the zone of future earthquake source. This
means that the Earth is not the uniform environment, but it is the porous electro conductive
one, where exist some dielectric clasters like bubble marks. From physical point
of view this can compare to water and rubber. It is known that in the water exist
some small bubble marks. Hydro location principle is based exactly on existents
of this one. The basement of this principle is resonant amplification of acoustic
waves. But except amplification is possible converse effect – decay of sounds. This
phenomenon is obvious on the example of rubber isolator that contains the air clasters
like water. In this case clasters are generator of acoustic waves with vice versa
phase. They perform screening of acoustic waves by superposition with outside
noise.
We permit that generation of electromagnetic and acoustic waves will be generated in the
same volume. In this case the character of acoustic waves has to be determined by equation of
mechanical resonator.
- ––
V1 S
Ï = 2Ï-- V-L
(1)
where V1 is sound velocity, S is the square of section of analog acoustic resonator throat L is
the character length of resonator, V is volume.
So, presented model shows possibility of simultaneous generation of low frequency
acoustic waves and electromagnetic wave with 1 -100 Megahertz. For qualitative analysis and
rough quantitative estimation it is permitted existence of air claster with small size
(102 sm) in earth crust where acoustic and electromagnetic resonator can function
simultaneously.
Based on the above imaginations there are revealed local places in the territory of Georgia
where emission of acoustic waves may take place before earthquakes occurring. |
|
|
|
|
|
|