Final Report Summary - SEISMOLOS (Ground-motion modelling for seismic hazard assessment in regions with moderate to low seismic activity)
Ground-motion prediction in regions of low-to-moderate seismicity is a difficult task due to the lack of strong ground-motion recordings. Consequently, alternatives to the usual procedure which consists in establishing a ground-motion prediction equation based strong ground motion data have to be found. Such an alternative is stochastic ground-motion modelling.
The inputs to stochastic ground-motion modelling are parameters which describe source, propagation and site effects for the region under study. Data from France metropolitan area and French West Indies are analysed in this project in order to provide inputs for future stochastic ground-motion modelling. Homogeneous moment magnitudes catalogues are determined as well as regional attenuation functions. One major finding during the project concerns the scaling of source properties with earthquake size observed for small earthquakes with moment magnitudes lower than 4.5. Additionally, strong-ground motion data from the USA and Japan are analysed in order to better characterise rock site effects, and more specifically the high-frequency attenuation.
The results of this project consist of sets of parameters which can be used to model ground-motion using the stochastic simulation method.
The inputs to stochastic ground-motion modelling are parameters which describe source, propagation and site effects for the region under study. Data from France metropolitan area and French West Indies are analysed in this project in order to provide inputs for future stochastic ground-motion modelling. Homogeneous moment magnitudes catalogues are determined as well as regional attenuation functions. One major finding during the project concerns the scaling of source properties with earthquake size observed for small earthquakes with moment magnitudes lower than 4.5. Additionally, strong-ground motion data from the USA and Japan are analysed in order to better characterise rock site effects, and more specifically the high-frequency attenuation.
The results of this project consist of sets of parameters which can be used to model ground-motion using the stochastic simulation method.