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Résultats exploitables
The existing methods for monitoring areas of high seismic risk are based essentially on ground-based means of observation. These methods provide information on seismic activity and ground deformation only in small area where seismic stations and other means of ground deformation measurements are installed. Moreover, seismic and ground deformation data are collected only by either carrying out expensive and time-consuming ground campaigns or using expensive instrumentation.
There are many benefits from the application of remote sensing techniques to monitor areas of high seismic risk, especially if we consider the intrinsic possibility of the SAR satellite system that can monitor periodically, and in every weather condition, extended areas without the need of additional field measurements. As far as the economic aspect is concerned, the costs of an operative monitoring network based mainly on existing satellites should be relatively low. Moreover, the space techniques, when compared with conventional methods of observation, are less expensive in terms of instrumentation to be installed in situ and of maintenance of this instrumentation. In addition, the possibility of having redundant data on seismic activity and ground deformation improves the identification of earthquake precursory phenomena and the understanding of the basic mechanisms of seismotectonic processes. In practice, the development of a new methodology for modelling the ground motion can provide a useful tool to evaluate the earthquake impact on the environment improving the seismic behaviour of the existing constructions and assessing the earthquake impact on future human settlement.
Finally, if the effectiveness of this new integrated technique is demonstrated, European Seismic Precursory Network could be carried out as in other countries, like the United States and Japan, where seismic surveillance systems are working regularly. This network could give a leading role to European industry in the field of seismic risk prevention.
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