Sismological evidence of topographic site effects in 1909 Provence earthquake damage distribution
Résumé
During the 1909 Provence earthquake, a lot of municipalities exhibited strong variations in damage distribution. For some of them and Rognes in particular, the historical perched village suffered more damage than constructions built on the flat part of the territories. While seismologists began to observe site effect importance in earthquakes, this 1909 damage distribution became the most famous French illustration of topographic site effect. But if ray theory explains that relief can indubitably focus waves and amplify seismic signal for specific wavelength according to the location on the slope, some doubts remain about the real impact of topographic effects in 1909 damage distribution. In order to evaluate the site effect in the city of Rognes, we set up several seismological field campaigns. Numerical simulation are also conducted to be compared to the experimental results. The main issues of this work is then :
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