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Investigation of seismicity after the initiation of a Seismic Electric Signal activity until the main shock
The behavior of seismicity in the area candidate to suffer a main shock is investigated after the observation of the Seismic Electric Signal activity until the impending main shock. This is based on the view that the occurrence of earthquakes is a critical phenomenon to which statistical dynamics ma...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Japan Academy
2008
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3722020/ https://www.ncbi.nlm.nih.gov/pubmed/18941306 http://dx.doi.org/10.2183/pjab/84.331 |
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author | Sarlis, N. V. Skordas, E. S. Lazaridou, M. S. Varotsos, P. A. |
author_facet | Sarlis, N. V. Skordas, E. S. Lazaridou, M. S. Varotsos, P. A. |
author_sort | Sarlis, N. V. |
collection | PubMed |
description | The behavior of seismicity in the area candidate to suffer a main shock is investigated after the observation of the Seismic Electric Signal activity until the impending main shock. This is based on the view that the occurrence of earthquakes is a critical phenomenon to which statistical dynamics may be applied. In the present work, analysing the time series of small earthquakes, the concept of natural time χ was used and the results revealed that the approach to criticality itself can be manifested by the probability density function (PDF) of κ(1) calculated over an appropriate statistical ensemble. Here, κ(1) is the variance κ(1)(= 〈χ(2)〉 − 〈χ〉(2)) resulting from the power spectrum of a function defined as [Formula: see text] , where p(k) is the normalized energy of the k-th small earthquake and ω the natural frequency. This PDF exhibits a maximum at κ(1) ≈ 0.070 a few days before the main shock. Examples are presented, referring to the magnitude 6∼7 class earthquakes that occurred in Greece. |
format | Online Article Text |
id | pubmed-3722020 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2008 |
publisher | The Japan Academy |
record_format | MEDLINE/PubMed |
spelling | pubmed-37220202013-08-09 Investigation of seismicity after the initiation of a Seismic Electric Signal activity until the main shock Sarlis, N. V. Skordas, E. S. Lazaridou, M. S. Varotsos, P. A. Proc Jpn Acad Ser B Phys Biol Sci Articles The behavior of seismicity in the area candidate to suffer a main shock is investigated after the observation of the Seismic Electric Signal activity until the impending main shock. This is based on the view that the occurrence of earthquakes is a critical phenomenon to which statistical dynamics may be applied. In the present work, analysing the time series of small earthquakes, the concept of natural time χ was used and the results revealed that the approach to criticality itself can be manifested by the probability density function (PDF) of κ(1) calculated over an appropriate statistical ensemble. Here, κ(1) is the variance κ(1)(= 〈χ(2)〉 − 〈χ〉(2)) resulting from the power spectrum of a function defined as [Formula: see text] , where p(k) is the normalized energy of the k-th small earthquake and ω the natural frequency. This PDF exhibits a maximum at κ(1) ≈ 0.070 a few days before the main shock. Examples are presented, referring to the magnitude 6∼7 class earthquakes that occurred in Greece. The Japan Academy 2008-10 /pmc/articles/PMC3722020/ /pubmed/18941306 http://dx.doi.org/10.2183/pjab/84.331 Text en © 2008 The Japan Academy This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Articles Sarlis, N. V. Skordas, E. S. Lazaridou, M. S. Varotsos, P. A. Investigation of seismicity after the initiation of a Seismic Electric Signal activity until the main shock |
title | Investigation of seismicity after the initiation of a Seismic Electric Signal activity until the main shock |
title_full | Investigation of seismicity after the initiation of a Seismic Electric Signal activity until the main shock |
title_fullStr | Investigation of seismicity after the initiation of a Seismic Electric Signal activity until the main shock |
title_full_unstemmed | Investigation of seismicity after the initiation of a Seismic Electric Signal activity until the main shock |
title_short | Investigation of seismicity after the initiation of a Seismic Electric Signal activity until the main shock |
title_sort | investigation of seismicity after the initiation of a seismic electric signal activity until the main shock |
topic | Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3722020/ https://www.ncbi.nlm.nih.gov/pubmed/18941306 http://dx.doi.org/10.2183/pjab/84.331 |
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