HR: 0800h
AN: NG21C-0710    [Abstracts]
TI: Long-range connective sandpile models and its implication to seismicity evolution
AU: * Lee, Y
EM: shine2530@yahoo.com.tw
AF: Natl Central Univ., Inst. Geophys., No. 300, Jhongda Rd., Jhongli, 320, Taiwan
AU: Chen, C
EM: chencc@ncu.edu.tw
AF: Natl Central Univ., Inst. Geophys., No. 300, Jhongda Rd., Jhongli, 320, Taiwan
AU: Chiao, L
EM: chiao@ntu.edu.tw
AF: Natl Taiwan Univ., Inst. Oceanography, No. 1, Sec. 4, Roosevelt Rd., Taipei, 106, Taiwan
AB: We propose a new variant of the sandpile model, the long-range connective sandpile model, by means of introducing randomly internal connections between two separated, distant cells. The long-range connective sandpile model demonstrates various self-organized critical states with different scaling exponents in the power- law frequency-size distributions. We found that a sandpile with higher degree of randomly internal long-range connections is characterized by a higher value of the scaling exponent for the distribution, whereas the nearest neighbor sandpile is possessed of a lower scaling exponent. Our numerical experiments on the long-range connective sandpile models imply that higher degree of random long-range connections makes the earthquake fault system more relaxant that releases accumulated energy more easily and produces fewer catastrophic events, whereas lower degree of long-range connections, possibly caused by fracture healing, very likely motivates accelerating seismicity of moderate events.
DE: 4425 Critical phenomena
DE: 4430 Complex systems
DE: 4475 Scaling: spatial and temporal (1872, 3270, 4277)
DE: 4480 Self-organized criticality
SC: Nonlinear Geophysics [NG]
MN: 2007 Fall Meeting