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Title: Spatial analysis of hypocenter to fault relationships for determining fault process zone width in Japan.

Abstract

Preliminary investigation areas (PIA) for a potential repository of high-level radioactive waste must be evaluated by NUMO with regard to a number of qualifying factors. One of these factors is related to earthquakes and fault activity. This study develops a spatial statistical assessment method that can be applied to the active faults in Japan to perform such screening evaluations. This analysis uses the distribution of seismicity near faults to define the width of the associated process zone. This concept is based on previous observations of aftershock earthquakes clustered near active faults and on the assumption that such seismic activity is indicative of fracturing and associated impacts on bedrock integrity. Preliminary analyses of aggregate data for all of Japan confirmed that the frequency of earthquakes is higher near active faults. Data used in the analysis were obtained from NUMO and consist of three primary sources: (1) active fault attributes compiled in a spreadsheet, (2) earthquake hypocenter data, and (3) active fault locations. Examination of these data revealed several limitations with regard to the ability to associate fault attributes from the spreadsheet to locations of individual fault trace segments. In particular, there was no direct link between attributes of the active faultsmore » in the spreadsheet and the active fault locations in the GIS database. In addition, the hypocenter location resolution in the pre-1983 data was less accurate than for later data. These pre-1983 hypocenters were eliminated from further analysis.« less

Authors:
; ; ;  [1]
  1. (Abilene Christian University, Abilene, TX)
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
876371
Report Number(s):
SAND2004-4899
TRN: US0601184
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; AFTERSHOCKS; DISTRIBUTION; EARTHQUAKES; FRACTURING; GEOGRAPHIC INFORMATION SYSTEMS; HIGH-LEVEL RADIOACTIVE WASTES; HYPOCENTERS; RESOLUTION; SEISMICITY; Radioactive waste disposal.; High level radioactive waste disposal.; Earthquakes; Japan.

Citation Formats

Arnold, Bill Walter, Roberts, Barry L., McKenna, Sean Andrew, and Coburn, Timothy C. Spatial analysis of hypocenter to fault relationships for determining fault process zone width in Japan.. United States: N. p., 2004. Web. doi:10.2172/876371.
Arnold, Bill Walter, Roberts, Barry L., McKenna, Sean Andrew, & Coburn, Timothy C. Spatial analysis of hypocenter to fault relationships for determining fault process zone width in Japan.. United States. doi:10.2172/876371.
Arnold, Bill Walter, Roberts, Barry L., McKenna, Sean Andrew, and Coburn, Timothy C. Wed . "Spatial analysis of hypocenter to fault relationships for determining fault process zone width in Japan.". United States. doi:10.2172/876371. https://www.osti.gov/servlets/purl/876371.
@article{osti_876371,
title = {Spatial analysis of hypocenter to fault relationships for determining fault process zone width in Japan.},
author = {Arnold, Bill Walter and Roberts, Barry L. and McKenna, Sean Andrew and Coburn, Timothy C.},
abstractNote = {Preliminary investigation areas (PIA) for a potential repository of high-level radioactive waste must be evaluated by NUMO with regard to a number of qualifying factors. One of these factors is related to earthquakes and fault activity. This study develops a spatial statistical assessment method that can be applied to the active faults in Japan to perform such screening evaluations. This analysis uses the distribution of seismicity near faults to define the width of the associated process zone. This concept is based on previous observations of aftershock earthquakes clustered near active faults and on the assumption that such seismic activity is indicative of fracturing and associated impacts on bedrock integrity. Preliminary analyses of aggregate data for all of Japan confirmed that the frequency of earthquakes is higher near active faults. Data used in the analysis were obtained from NUMO and consist of three primary sources: (1) active fault attributes compiled in a spreadsheet, (2) earthquake hypocenter data, and (3) active fault locations. Examination of these data revealed several limitations with regard to the ability to associate fault attributes from the spreadsheet to locations of individual fault trace segments. In particular, there was no direct link between attributes of the active faults in the spreadsheet and the active fault locations in the GIS database. In addition, the hypocenter location resolution in the pre-1983 data was less accurate than for later data. These pre-1983 hypocenters were eliminated from further analysis.},
doi = {10.2172/876371},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {9}
}

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