Surface rupture database for seismic hazard assessment - 2015 Report of the kick-off meeting of the SURE database working group
| Main Authors: | Baize, Stéphane, Cinti, Francesca, Costa, Carlos, Dawson, Tim, Elliott, Austin, Guerrieri, Luca, McCalpin, Jim, Okumura, Koji, Scotti, Oona, Takao, Makoto, Villamor, Pilar, Walker, Richard |
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| Format: | Report publication-deliverable |
| Terbitan: |
, 2016
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/2314963 |
Daftar Isi:
- The goal of the fault displacement hazard assessment is to describe and quantify the permanent displacement that can occur during an earthquake at the ground surface. One of the methods to do so is probabilistic (PFDHA: Probabilistic Fault Displacement Hazard Analysis) and is basically based on empirical approaches which allows predicting the possible displacement on the earthquake fault (« on-fault » displacement) and off this major fault on other fault segments (« off-fault » displacement). Predictive relationships (also called “regressions”) were published in the last 15 years (e.g. Youngs et al., 2003; Petersen et al., 2011; Takao et al., 2013) and they are based on data catalogs limited in case numbers and in magnitude ranges. Because there are practical applications of PFDHA in terms of engineering, there is concern in the geologists and engineers communities, for instance in the INQUA and the IAEA-ISSC groups, to improve the methodology. A first and critical step is to build up a community-sourced, worldwide, unified database of surface rupturing earthquakes to include a large number of earthquake cases in various seismotectonic contexts. This is the core task of the SURE (Surface Rupture Earthquake) Working Group which is growing with the support of INQUA and IAEA-ISSC. During the kick-off meeting held in Paris (October 2015) and sponsored by the Institut de Radioprotection et Sûreté Nucléaire (IRSN), earthquake geology experts from the USA, Europe (France, Italy, UK, Germany), Japan, New Zealand, South America (Argentina) formed this group and exchanged their experience in surface rupturing events during 3 days. The US and Japanese colleagues presented the existing datasets and the whole group proposed a structure for the future unified database, also suggesting a list of new parameters to be included (e.g. soil conditions). The attendance underlined that one of the challenges will be to aggregate “historical” cases (events back to the 50’s or even older in the Japanese dataset) with scarce data and recent events with huge number and accurate measurement of displacements from modern techniques (high-resolution elevation maps with LiDAR, 3D imaging with SfM photogrammetry, deformation maps with InSAR).