Fractal analysis of seismoacoustic signalsof near-surface sedimentary rocks in Kamchatka
We studied, by the mono- and multifractal detrended fluctuation analysis (DFA), time fluctuations in the dynamics of seismoacoustic data, recorded in Karymshina site, which is located in a seismic area of Kamchatka. We took a series of seismoacoustic responses to the regional seismic events with the...
Published in: | Geofizika |
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Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Andrija Mohorovicic Geophysical Institute
2019
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Subjects: | |
Online Access: | https://hrcak.srce.hr/232674 https://hrcak.srce.hr/file/338482 |
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fthrcak:oai:hrcak.srce.hr:232674 |
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openpolar |
institution |
Open Polar |
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Hrčak - Portal of scientific journals of Croatia |
op_collection_id |
fthrcak |
language |
English |
topic |
seismoacoustic signal monofractal Hurst exponent multifractal detrended fluctuation analysis seizmoakustični signal monofraktal Hurstov eksponent multifraktal detrendirana fluktuacijska analiza |
spellingShingle |
seismoacoustic signal monofractal Hurst exponent multifractal detrended fluctuation analysis seizmoakustični signal monofraktal Hurstov eksponent multifraktal detrendirana fluktuacijska analiza Imashev, Sanjar Mishchenko, Mikhail Cheshev, Mikhail Fractal analysis of seismoacoustic signalsof near-surface sedimentary rocks in Kamchatka |
topic_facet |
seismoacoustic signal monofractal Hurst exponent multifractal detrended fluctuation analysis seizmoakustični signal monofraktal Hurstov eksponent multifraktal detrendirana fluktuacijska analiza |
description |
We studied, by the mono- and multifractal detrended fluctuation analysis (DFA), time fluctuations in the dynamics of seismoacoustic data, recorded in Karymshina site, which is located in a seismic area of Kamchatka. We took a series of seismoacoustic responses to the regional seismic events with the mag-nitudes M > 4 for the period 2017–2018. The series was divided into three groups (high, medium and low) based on the amplitude of recorded seismoacoustic re-sponse. Background noise segments of the signals demonstrated monofractal behavior similar to white noise by almost constant values of generalized Hurst exponent Hq≈0.5 and very small width of the multifractal spectrum Δa ≈ 0.1. Analysis of the high amplitude seismoacoustic signals with clear P-, S- and coda waves showed that P- and S-waves demonstrate wider multifractal spectrum (ΔaP = 0.37, ΔaS = 0.35) and range of generalized Hurst exponents Hq in com-parison with coda wave, characterized by almost constant Hq and minimal width of multifractal spectrum (ΔaCODA = 0.13). We showed that the properties of the multifractal spectrum could be used in detection of seismic wave arrival, estima-tion its duration and separation of P-, S- and coda waves. Application of the monofractal DFA in a sliding window showed that the acoustic signal transits from monofractal and uncorrelated background noise (Hurst exponent equals to 0.5) into the long-range dependent state during seismic waves arrival, that is helpful in analysis of the signals, particularly in case of low amplitude acous-tic responses, usually demonstrating an unclear waveform. Difference in mul-tifractal spectrum width between the original low amplitude signal and its sur-rogates, obtained by random shuffling showed that the multifractality in the signal is dominantly due to long-range correlations. U ovom smo radu mono- i multifraktalnom detrendiranom fluktuacijskom analizom (DFA) proučavali vremenske fluktuacije u dinamici seizmoakustičnih podataka zabilježe-nih na postaji Karymshina, koja je smještena u seizmički aktivnom području Kamčatke. U analizi smo koristili niz seizmoakustičnih odziva prilagođenih na regionalne potrese s magnitudama M > 4 za razdoblje 2017.–2018. Niz smo podijelili u tri grupe (visoka, sred-nja i niska) na temelju amplitude zabilježenog seizmoakustičnog odziva. Dio mikroseiz-mičkog nemira prisutnog unutar signala iskazuje monofraktalnu strukturu sličnu bijelom šumu s gotovo konstantnim vrijednostima generaliziranog Hurstovog eksponenta Hq ≈ 0,5 i vrlo malom širinom multifraktalnog spektra Δa ≈ 0,1. Analiza seizmoakustičnog signa-la visoke amplitude s jasnim P-, S- i koda valovima pokazala je da P- i S-valovi pokazuju širi multifraktalni spektar (ΔaP = 0,37, ΔaS = 0,35) i raspon generaliziranih Hurstovih eksponenata Hq u usporedbi s koda valovima, koje karakterizira gotovo konstantan Hq i minimalna širina multifraktalnog spektra (ΔaCODA = 0,13). Pokazali smo da se svojstva multifraktalnog spektra mogu upotrijebiti za otkrivanje nailaska seizmičkih valova, pro-cjenu nihovog trajanja i razdvajanje P-, S- i koda valova. Primjena monofraktalne DFA metode na zapise u kliznom prozoru pokazala je da akustički signal prelazi iz monofrak-talnog i nekoreliranog mikroseizmičkog nemira (Hurstov eksponent jednak 0,5) u stanje dugog dometa tijekom dolaska seizmičkih valova, što je korisno u analizi signala, poseb-no u slučaju akustičnih odziva niske amplitude s nejasnim valnim oblikom. Razlika u širini multifraktalnog spektra između izvornog signala niske amplitude i njegovih zam-jenskih oblika, dobivenih nasumičnim odabirom, ukazuje da multifraktalnost u signalu dominantno ovisi o dalekosežnim korelacijama. |
format |
Article in Journal/Newspaper |
author |
Imashev, Sanjar Mishchenko, Mikhail Cheshev, Mikhail |
author_facet |
Imashev, Sanjar Mishchenko, Mikhail Cheshev, Mikhail |
author_sort |
Imashev, Sanjar |
title |
Fractal analysis of seismoacoustic signalsof near-surface sedimentary rocks in Kamchatka |
title_short |
Fractal analysis of seismoacoustic signalsof near-surface sedimentary rocks in Kamchatka |
title_full |
Fractal analysis of seismoacoustic signalsof near-surface sedimentary rocks in Kamchatka |
title_fullStr |
Fractal analysis of seismoacoustic signalsof near-surface sedimentary rocks in Kamchatka |
title_full_unstemmed |
Fractal analysis of seismoacoustic signalsof near-surface sedimentary rocks in Kamchatka |
title_sort |
fractal analysis of seismoacoustic signalsof near-surface sedimentary rocks in kamchatka |
publisher |
Andrija Mohorovicic Geophysical Institute |
publishDate |
2019 |
url |
https://hrcak.srce.hr/232674 https://hrcak.srce.hr/file/338482 |
long_lat |
ENVELOPE(158.291,158.291,52.953,52.953) ENVELOPE(41.488,41.488,63.100,63.100) ENVELOPE(25.283,25.283,66.183,66.183) |
geographic |
Karymshina Koda Niska |
geographic_facet |
Karymshina Koda Niska |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Geofizika ISSN 0352-3659 (Print) ISSN 1846-6346 (Online) Volume 36 Issue 2 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.15233/gfz.2019.36.15 https://hrcak.srce.hr/232674 |
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info:eu-repo/semantics/openAccess All manuscripts published on-line are subject to Creative Commons Attribution-NonCommercial 4.0 International License which permits users to read, download, copy, redistribute, print, search, or link to the full texts of these articles in any medium or format. Also, users can remix, transform and build upon the material, provided the original work is properly cited and any changes properly indicated. They may not use the material for commercial purposes. By submitting a manuscript, the author accepts the application of the Creative Commons Attribution-NonCommercial 4.0 International License. |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.15233/gfz.2019.36.15 |
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fthrcak:oai:hrcak.srce.hr:232674 2023-05-15T16:59:22+02:00 Fractal analysis of seismoacoustic signalsof near-surface sedimentary rocks in Kamchatka Fraktalna analiza seizmoakustičnih signala u sedimentnim stijenama blizu površine na Kamčatki Imashev, Sanjar Mishchenko, Mikhail Cheshev, Mikhail 2019 application/pdf https://hrcak.srce.hr/232674 https://hrcak.srce.hr/file/338482 eng eng Andrija Mohorovicic Geophysical Institute info:eu-repo/semantics/altIdentifier/doi/10.15233/gfz.2019.36.15 https://hrcak.srce.hr/232674 info:eu-repo/semantics/openAccess All manuscripts published on-line are subject to Creative Commons Attribution-NonCommercial 4.0 International License which permits users to read, download, copy, redistribute, print, search, or link to the full texts of these articles in any medium or format. Also, users can remix, transform and build upon the material, provided the original work is properly cited and any changes properly indicated. They may not use the material for commercial purposes. By submitting a manuscript, the author accepts the application of the Creative Commons Attribution-NonCommercial 4.0 International License. CC-BY-NC Geofizika ISSN 0352-3659 (Print) ISSN 1846-6346 (Online) Volume 36 Issue 2 seismoacoustic signal monofractal Hurst exponent multifractal detrended fluctuation analysis seizmoakustični signal monofraktal Hurstov eksponent multifraktal detrendirana fluktuacijska analiza text info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 fthrcak https://doi.org/10.15233/gfz.2019.36.15 2020-01-29T23:56:29Z We studied, by the mono- and multifractal detrended fluctuation analysis (DFA), time fluctuations in the dynamics of seismoacoustic data, recorded in Karymshina site, which is located in a seismic area of Kamchatka. We took a series of seismoacoustic responses to the regional seismic events with the mag-nitudes M > 4 for the period 2017–2018. The series was divided into three groups (high, medium and low) based on the amplitude of recorded seismoacoustic re-sponse. Background noise segments of the signals demonstrated monofractal behavior similar to white noise by almost constant values of generalized Hurst exponent Hq≈0.5 and very small width of the multifractal spectrum Δa ≈ 0.1. Analysis of the high amplitude seismoacoustic signals with clear P-, S- and coda waves showed that P- and S-waves demonstrate wider multifractal spectrum (ΔaP = 0.37, ΔaS = 0.35) and range of generalized Hurst exponents Hq in com-parison with coda wave, characterized by almost constant Hq and minimal width of multifractal spectrum (ΔaCODA = 0.13). We showed that the properties of the multifractal spectrum could be used in detection of seismic wave arrival, estima-tion its duration and separation of P-, S- and coda waves. Application of the monofractal DFA in a sliding window showed that the acoustic signal transits from monofractal and uncorrelated background noise (Hurst exponent equals to 0.5) into the long-range dependent state during seismic waves arrival, that is helpful in analysis of the signals, particularly in case of low amplitude acous-tic responses, usually demonstrating an unclear waveform. Difference in mul-tifractal spectrum width between the original low amplitude signal and its sur-rogates, obtained by random shuffling showed that the multifractality in the signal is dominantly due to long-range correlations. U ovom smo radu mono- i multifraktalnom detrendiranom fluktuacijskom analizom (DFA) proučavali vremenske fluktuacije u dinamici seizmoakustičnih podataka zabilježe-nih na postaji Karymshina, koja je smještena u seizmički aktivnom području Kamčatke. U analizi smo koristili niz seizmoakustičnih odziva prilagođenih na regionalne potrese s magnitudama M > 4 za razdoblje 2017.–2018. Niz smo podijelili u tri grupe (visoka, sred-nja i niska) na temelju amplitude zabilježenog seizmoakustičnog odziva. Dio mikroseiz-mičkog nemira prisutnog unutar signala iskazuje monofraktalnu strukturu sličnu bijelom šumu s gotovo konstantnim vrijednostima generaliziranog Hurstovog eksponenta Hq ≈ 0,5 i vrlo malom širinom multifraktalnog spektra Δa ≈ 0,1. Analiza seizmoakustičnog signa-la visoke amplitude s jasnim P-, S- i koda valovima pokazala je da P- i S-valovi pokazuju širi multifraktalni spektar (ΔaP = 0,37, ΔaS = 0,35) i raspon generaliziranih Hurstovih eksponenata Hq u usporedbi s koda valovima, koje karakterizira gotovo konstantan Hq i minimalna širina multifraktalnog spektra (ΔaCODA = 0,13). Pokazali smo da se svojstva multifraktalnog spektra mogu upotrijebiti za otkrivanje nailaska seizmičkih valova, pro-cjenu nihovog trajanja i razdvajanje P-, S- i koda valova. Primjena monofraktalne DFA metode na zapise u kliznom prozoru pokazala je da akustički signal prelazi iz monofrak-talnog i nekoreliranog mikroseizmičkog nemira (Hurstov eksponent jednak 0,5) u stanje dugog dometa tijekom dolaska seizmičkih valova, što je korisno u analizi signala, poseb-no u slučaju akustičnih odziva niske amplitude s nejasnim valnim oblikom. Razlika u širini multifraktalnog spektra između izvornog signala niske amplitude i njegovih zam-jenskih oblika, dobivenih nasumičnim odabirom, ukazuje da multifraktalnost u signalu dominantno ovisi o dalekosežnim korelacijama. Article in Journal/Newspaper Kamchatka Hrčak - Portal of scientific journals of Croatia Karymshina ENVELOPE(158.291,158.291,52.953,52.953) Koda ENVELOPE(41.488,41.488,63.100,63.100) Niska ENVELOPE(25.283,25.283,66.183,66.183) Geofizika 36 2 153 169 |