Seismological studies of upper mantle structure below the Mediterranean with a regional seismograph network

ABSTRACT

A broadband seismograph network can provide valuable information for the study of a complex area such as the Mediterranean. Besides enabling the detailed study of source processes, the network also supplies fundamental data for analyzing lithospheric and asthenospheric structure. These are the two main goals considered when planning the MEDNET network of very broadband stations. Three dimensional tomographic images of Mediterranean upper mantle have been obtained from bulletin travel time data. However, the complexity of body wave propagation at regional distances requires the analsis of full waveforms in order to identify correctly energy which has travelled along different paths. The high quality data that are now available from broadband seismograph allow further investigations, such as those based on surface waves and broadband body waveform modelling. The geographical distribution obtained through the stations of the MEDNET and other program makes up a dataset with a high potential which has been exploited only in part