Analysis of seismo-acoustic emission from ice fracturing events during SIMI’94

Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution February 1999 In this thesis the analysis of natural ice events is carried out based on direct measurements of ice-bor...

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Main Author: Dudko, Yuriy V.
Format: Thesis
Language:English
Published: Massachusetts Institute of Technology and Woods Hole Oceanographic Institution 1999
Subjects:
Ice
Online Access:https://hdl.handle.net/1912/4706
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record_format openpolar
spelling ftwhoas:oai:darchive.mblwhoilibrary.org:1912/4706 2023-05-15T14:53:05+02:00 Analysis of seismo-acoustic emission from ice fracturing events during SIMI’94 Dudko, Yuriy V. Central Arctic 1999-02 application/pdf https://hdl.handle.net/1912/4706 en_US eng Massachusetts Institute of Technology and Woods Hole Oceanographic Institution WHOI Theses https://hdl.handle.net/1912/4706 doi:10.1575/1912/4706 doi:10.1575/1912/4706 Microseisms Seismology Underwater acoustics Remote sensing Sea ice Ice Thesis 1999 ftwhoas https://doi.org/10.1575/1912/4706 2022-05-28T22:58:25Z Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution February 1999 In this thesis the analysis of natural ice events is carried out based on direct measurements of ice-borne seismo-acoustic waves generated by ice fracturing processes. A major reason for studying this phenomenon is that this acoustic emission is a significant contributor to Arctic ocean ambient noise. Also the Arctic contains rich mineral and oil resources and in order to design mining facilities able to withstand the harsh environmental conditions, we need to have a better understanding of the processes of sea ice mechanics. The data analyzed in this thesis were collected during the Sea Ice Mechanics Initiative SIMI’94 experiment which was carried out in the spring of 1994 in the Central Arctic. One of the contributions of this thesis was the determination of the polarization characteristics of elastic waves using multicomponent geophone data. Polarization methods are well known in seismology, but they have never been used for ice event data processing. In this work one of the polarization methods so called Motion Product Detector method has been successfully applied for localization of ice events and determination of polarization characteristics of elastic waves generated by fracturing events. This application demonstrates the feasibility of the polarization method for ice event data processing because it allows one to identify areas of high stress concentration and "hot spots" in ridge building process. The identification of source mechanisms is based on the radiation patterns of the events. This identification was carried out through the analysis of the seismo-acoustic emission of natural ice events in the ice sheet. Previous work on natural ice event identification was done indirectly by analyzing the acoustic energy radiated into the water through coupling from elastic energy in the ice sheet. After ... Thesis Arctic Arctic Ocean Ice Sheet Sea ice Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Arctic Arctic Ocean Woods Hole, MA
institution Open Polar
collection Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
op_collection_id ftwhoas
language English
topic Microseisms
Seismology
Underwater acoustics
Remote sensing
Sea ice
Ice
spellingShingle Microseisms
Seismology
Underwater acoustics
Remote sensing
Sea ice
Ice
Dudko, Yuriy V.
Analysis of seismo-acoustic emission from ice fracturing events during SIMI’94
topic_facet Microseisms
Seismology
Underwater acoustics
Remote sensing
Sea ice
Ice
description Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution February 1999 In this thesis the analysis of natural ice events is carried out based on direct measurements of ice-borne seismo-acoustic waves generated by ice fracturing processes. A major reason for studying this phenomenon is that this acoustic emission is a significant contributor to Arctic ocean ambient noise. Also the Arctic contains rich mineral and oil resources and in order to design mining facilities able to withstand the harsh environmental conditions, we need to have a better understanding of the processes of sea ice mechanics. The data analyzed in this thesis were collected during the Sea Ice Mechanics Initiative SIMI’94 experiment which was carried out in the spring of 1994 in the Central Arctic. One of the contributions of this thesis was the determination of the polarization characteristics of elastic waves using multicomponent geophone data. Polarization methods are well known in seismology, but they have never been used for ice event data processing. In this work one of the polarization methods so called Motion Product Detector method has been successfully applied for localization of ice events and determination of polarization characteristics of elastic waves generated by fracturing events. This application demonstrates the feasibility of the polarization method for ice event data processing because it allows one to identify areas of high stress concentration and "hot spots" in ridge building process. The identification of source mechanisms is based on the radiation patterns of the events. This identification was carried out through the analysis of the seismo-acoustic emission of natural ice events in the ice sheet. Previous work on natural ice event identification was done indirectly by analyzing the acoustic energy radiated into the water through coupling from elastic energy in the ice sheet. After ...
format Thesis
author Dudko, Yuriy V.
author_facet Dudko, Yuriy V.
author_sort Dudko, Yuriy V.
title Analysis of seismo-acoustic emission from ice fracturing events during SIMI’94
title_short Analysis of seismo-acoustic emission from ice fracturing events during SIMI’94
title_full Analysis of seismo-acoustic emission from ice fracturing events during SIMI’94
title_fullStr Analysis of seismo-acoustic emission from ice fracturing events during SIMI’94
title_full_unstemmed Analysis of seismo-acoustic emission from ice fracturing events during SIMI’94
title_sort analysis of seismo-acoustic emission from ice fracturing events during simi’94
publisher Massachusetts Institute of Technology and Woods Hole Oceanographic Institution
publishDate 1999
url https://hdl.handle.net/1912/4706
op_coverage Central Arctic
geographic Arctic
Arctic Ocean
geographic_facet Arctic
Arctic Ocean
genre Arctic
Arctic Ocean
Ice Sheet
Sea ice
genre_facet Arctic
Arctic Ocean
Ice Sheet
Sea ice
op_source doi:10.1575/1912/4706
op_relation WHOI Theses
https://hdl.handle.net/1912/4706
doi:10.1575/1912/4706
op_doi https://doi.org/10.1575/1912/4706
op_publisher_place Woods Hole, MA
_version_ 1766324509720182784