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Dependence of Sandpile Avalanche Frequency–size Distribution on Coverage Extent and Compactness of Embedded Toppling Threshold Heterogeneity: Implications for the Variation of Gutenberg–richter B Value : Volume 21, Issue 6 (05/12/2014)

By Chiao, L.-y.

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Book Id: WPLBN0003991660
Format Type: PDF Article :
File Size: Pages 9
Reproduction Date: 2015

Title: Dependence of Sandpile Avalanche Frequency–size Distribution on Coverage Extent and Compactness of Embedded Toppling Threshold Heterogeneity: Implications for the Variation of Gutenberg–richter B Value : Volume 21, Issue 6 (05/12/2014)  
Author: Chiao, L.-y.
Volume: Vol. 21, Issue 6
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Liu, Q., & Chiao, L. (2014). Dependence of Sandpile Avalanche Frequency–size Distribution on Coverage Extent and Compactness of Embedded Toppling Threshold Heterogeneity: Implications for the Variation of Gutenberg–richter B Value : Volume 21, Issue 6 (05/12/2014). Retrieved from

Description: Institute of Oceanography, National Taiwan University, Taipei, Taiwan. The effects of the spatiotemporal evolution of failure threshold heterogeneity on the dynamics of fault criticality, and thus on regional seismogenesis, have attracted strong interest in the field of regional seismotectonics. The heterogeneity might be a manifestation of the macroscopic distribution and multiscale strength variation of asperities, the distinct regional stress level, and (microscopically) heterogeneous fault surface roughness or friction regimes. In this study, rather than attempting to mimic the complex microscale slipping physics on a fault surface, sandpile cellular automata were implemented with a straightforward toppling rule. The objective is to examine the influence of distinct configurations of the embedded heterogeneous toppling threshold field on the global system avalanche event statistics. The examination results revealed that increasing the coverage extent and decreasing the compactness of the heterogeneous failure threshold, rather than the magnitude, range of contrast, diversity, or the geometric configuration of the threshold heterogeneity, leads to a systematic increase in the scaling exponent of the avalanche event power law statistics, implying the importance of mutual interaction among toppling sites with distinct thresholds. For tectonic provinces with differing stress regimes evolving spatio temporally, it is postulated that the distinct extent and compactness of the heterogeneous failure threshold are critical factors that manifest in the reported dynamic variations of seismicity scaling.

Dependence of sandpile avalanche frequency–size distribution on coverage extent and compactness of embedded toppling threshold heterogeneity: implications for the variation of Gutenberg–Richter b value

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