On-chip earthquake simulation model using potentials |
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Authors: | I G Georgoudas G Ch Sirakoulis E M Scordilis I Th Andreadis |
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Institution: | (1) Department of Electrical and Computer Engineering, Laboratory of Electronics, Democritus University of Thrace, 671 00 Xanthi, Greece;(2) Department of Geophysics, School of Geology, Aristotle University, 541 24 Thessaloniki, Greece |
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Abstract: | A two-dimensional (2-D) Cellular Automata (CA) dynamic system constituted of cells-charges has been proposed for the simulation
of the earthquake process. The CA model has been calibrated with the use of real data. The calibration incorporates major
seismic characteristics of the area under test. The simulation results are found in good quantitative and qualitative agreement
with the recorded Gutenberg–Richter (GR) scaling relations. The model is enriched with a powerful multi-parameter interface
that enables the user to load real data from different regions. This paper examines the on-chip realisation of the model and
its instrumentation. The CA model hardware implementation is based on Field Programmable Gate Array (FPGA) logic. It utilises
an array of 32 × 32 cells. Parameters that construct the local CA rule constitute the input data. The initial seed, which
to some extent corresponds to the seismic features of the area under test, is loaded in a semi-parallel way and the process
is completed in a certain number of time steps. The automatic response of the processor provides the corresponding GR scaling
law of the area under study. The hardware implementation of the CA-based earthquake simulation model is advantageous in terms
of low-cost, high-speed, compactness and portability features. It can operate as a preliminary data-acquisition filter that
accelerates the evaluation of recorded data as far as its origin time, spatial and magnitude completeness and quality are
concerned. Software that performs reliable automatic phase picking, as well as data elaboration, can be assembled next to
the earthquake recording instruments (the whole network) output to assure a quick and reliable iteration of the focal parameters
of a recorded earthquake (epicentre coordinates, focal depth and magnitude). The dedicated processor can be accommodated right
after this stage (before any manual elaboration) focusing on the near real-time development of a reliable qualitative dynamical
seismic record and a mapping of the seismic characteristics of the area. |
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Keywords: | Cellular automata Earthquake Modelling LC analogue Potential Seismic features mapping Instrumentation FPGA |
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