JDR Vol.11 No.2 pp. 265-271
doi: 10.20965/jdr.2016.p0265


Seismic Hazard Visualization from Big Simulation Data: Construction of a Parallel Distributed Processing System for Ground Motion Simulation Data

Takahiro Maeda and Hiroyuki Fujiwara

National Research Institute for Earth Science and Disaster Prevention (NIED)
3-1 Tennodai, Tsukuba, Ibaraki 305-0006, Japan

October 2, 2015
January 3, 2016
Online released:
March 18, 2016
March 1, 2016
seismic hazard, visualization, simulation, parallel distributed processing
We have developed a data mining system of parallel distributed processing system which is applicable to the large-scale and high-resolution numerical simulation of ground motion by transforming into ground motion indices and their statistical values, and then visualize their values for the seismic hazard information. In this system, seismic waveforms at many locations calculated for many possible earthquake scenarios can be used as input data. The system utilizes Hadoop and it calculates the ground motion indices, such as PGV, and statistical values, such as maximum, minimum, average, and standard deviation of PGV, by parallel distributed processing with MapReduce. The computation results are being an output as GIS (Geographic Information System) data file for visualization. And this GIS data is made available via the Web Map Service (WMS). In this study, we perform two benchmark tests by applying three-component synthetic waveforms at about 80,000 locations for 10 possible scenarios of a great earthquake in Nankai Trough to our system. One is the test for PGV calculation processing. Another one is the test for PGV data mining processing. A maximum of 10 parallel processing are tested for both cases. We find that our system can hold the performance even when the total tasks is larger than 10. This system can enable us to effectively study and widely distribute to the communities for disaster mitigation since it is built with data mining and visualization for hazard information by handling a large number of data from a large-scale numerical simulation.
Cite this article as:
T. Maeda and H. Fujiwara, “Seismic Hazard Visualization from Big Simulation Data: Construction of a Parallel Distributed Processing System for Ground Motion Simulation Data,” J. Disaster Res., Vol.11 No.2, pp. 265-271, 2016.
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