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| Titel |
Role of multifractal analysis in understanding the preparation zone for large size earthquake in the North-Western Himalaya region |
| VerfasserIn |
S. S. Teotia, D. Kumar |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 18, no. 1 ; Nr. 18, no. 1 (2011-02-15), S.111-118 |
| Datensatznummer |
250013872
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| Publikation (Nr.) |
 copernicus.org/npg-18-111-2011.pdf |
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| Zusammenfassung |
| Seismicity has power law in space, time and magnitude distributions and same
is expressed by the fractal dimension D, Omori's exponent p and
b-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 (Mw =7.6). Significant changes have been observed in generalised dimension
Dq, Dq spectra and b-value. The significant temporal changes in
generalised dimension Dq, b-value and Dq−q spectra prior to
occurrence of Muzaffrabad-Kashmir earthquake relates to distribution of
epicenters in the region. The decrease in generalised dimension and b-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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