******************************************************************************** Speculative application to post doctorate position on volcano-seismological approach of active magmatic system From: Fred Massin <frederick.massin@xxxxxxxxxxxxxxx> ******************************************************************************** Dear Researchers, I am a Ph.D. student in volcano-seismology at the University of la Réunion working under the supervision of Patrick Bachèlery (Director of the Geo-Sciences Laboratory at the Université de la Réunion) and Valérie Ferrazzini (Volcano-seismologist the Piton de la Fournaise Volcano Observatory-OVPF). My research is focused on the understanding of magma storage and transfer processes at Piton de la Fournaise volcano and is based on the analysis of source mechanisms of volcano-tectonic events recorded by the OVPF permanent seismic network from 2000 to 2008. In my thesis I have developed a method that uses automatic pick time estimation (CEC Method) and waveform clustering to relocate (hypoDD) and determine (fpfit) the sources of VT events. The obtained results allow highlighting the common part of the seismicity between pre-eruptive crisis. All these procedures can be adapted for real time analysis and eruption monitoring. The detailed analysis of focal mechanisms provides a comprehensive view of the stress field and allows refining a structural model (analyzed with CalculiX) that accounts for the major caldera-forming eruption of Piton de la Fournaise volcano (2007). The analysis of random signal interferometry, and P waves passive tomography gives realistic estimation of 3D velocity model. Random signals interferometry indicates temporal changes in physical properties of volcanoes during the preparation of eruptive episodes. As a development of my research, I propose the comparison of the results obtained from coda waves analysis with waveform clusters chronology and deformation trends, which highlight the temporal change of active structures. When integrated into sources study (focal mechanism determination and inversion), those observations are a robust basis for the the implementation of realistic 4D model of magmatic systems. In particular, this approach leads to stress field numerical modeling, which is one of the most important tools for predicting the spatial and temporal patterns of observed volcanic activity. My phD thesis comes to end in November 2009 and I would like to apply for a post-doc position with focus on volcano-seismology. Please find enclosed a link to my CV and a more extended description of my research. http://filex.univ-reunion.fr/get?k=cBreol0CyP7OwdE7FjB I look forward to receiving information about a postdoctoral opportunity at your Institutions, Sincerely yours, Frédérick Massin ============================================================== To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxxx To contribute to the volcano list, send your message to: volcano@xxxxxxxx Please do not send attachments. ==============================================================
