PostDoc position in Seismology (ambient noise)
These recent years, pioneer works have shown that it is possible to reconstruct the seismic Green’s function between two sensors from the cross-correlation of ambient seismic noise. This discovery has been widely employed to image the structure of the Earth’s interiors.
A similar approach has been also developed to measure temporal changes of seismic properties with an increased accuracy. The application of this approach to volcanic and tectonic domains has shown that it is possible to detect seismic velocity changes with an accuracy of 0.01 % and a temporal resolution as small as 1 day. However one limitation of this method comes from the difficulty to precisely localize and characterize these changes in space.
The goal of the expected research will be to improve the temporal and spatial resolution of these monitoring methods. This work will be held at IPGP (Paris) in close collaboration with physicists from Institut Langevin, Paris. We will in particular look forward to adapt the principles of time reversal and beamforming developed at the laboratory scale to the volcanic and tectonic scales. The researcher student will work with numerical modeling tools as well as with real data from Piton de la Fournaise Volcano (Réunion island) and Japan.
This appointment will start as soon as possible and will last 24 months. The postdoctoral researcher will be working at Institut de Physique du Globe de Paris and Institut Langevin, located in the same building in Paris city center and also in close collaboration with ISTerre (Grenoble). To apply or to get more information, contact Nikolai Shapiro (firstname.lastname@example.org), Julien De Rosny (email@example.com) and Florent Brenguier (firstname.lastname@example.org).