role of multifractal analysis in understanding the preparation zone for large size earthquake in the north-western himalaya region

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2011
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Abstract
Seismicity has power law in space, time and magnitude distributions and same is expressed by the fractal dimension <i>D</i>, Omori's exponent <i>p</i> and <i>b</i>-value. The spatio-temporal patterns of epicenters have heterogeneous characteristics. As the crust gets self-organised into critical state, the spatio-temporal clustering of epicenters emerges to heterogeneous nature of seismicity. To understand the heterogeneous characteristics of seismicity in a region, multifractal studies hold promise to characterise the dynamics of region. Multifractal study is done on seismicity data of the North-Western Himalaya region which mainly involve seismogenic region of 1905 Kangra great earthquake in the North-Western Himalaya region. The seismicity data obtained from USGS catalogue for time period 1973–2009 has been analysed for the region which includes the October 2005 Muzafrabad-Kashmir earthquake (<i>M</i><sub>w</sub> =7.6). Significant changes have been observed in generalised dimension <i>D<sub>q</sub></i>, <i>D<sub>q</sub></i> spectra and <i>b</i>-value. The significant temporal changes in generalised dimension <i>D<sub>q</sub></i>, <i>b</i>-value and <i>D<sub>q</sub>−q</i> spectra prior to occurrence of Muzaffrabad-Kashmir earthquake relates to distribution of epicenters in the region. The decrease in generalised dimension and <i>b</i>-value observed in our study show the relationship with the clustering of seismicity as is expected in self-organised criticality behaviour of earthquake occurrences. Such study may become important in understanding the preparation zone of large and great size earthquake in various tectonic regions.
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teotia2011nonlinearrole Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;S. S. Teotia;D. Kumar
Journal BMC research notes
Year 2011
DOI
10.5194/npg-18-111-2011
URL
http://www.nonlin-processes-geophys.net/18/111/2011/npg-18-111-2011.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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