Publication Date:
2019
Description:
〈span〉〈div〉Summary〈/div〉We use continuous seismic data recorded between January 2013 and December 2014 by Iranian Seismological Center (IRSC) and International Institute of Earthquake Engineering and Seismology (IIEES) networks. Empirical Green’s functions between the vertical components of the station pairs are reconstructed by cross-correlating the seismic noise (〈span〉C〈/span〉〈sup〉1〈/sup〉) and re-correlating the coda of the noise-correlations (〈span〉C〈/span〉〈sup〉3〈/sup〉). The combination of these two methods makes it possible to increase the number of retrieved empirical Green’s functions, which improves the spatial resolution of the tomographic imaging. We measure and then invert Rayleigh wave dispersion travel times to produce 2-D group velocity maps from a period range of 5 to 40 seconds for Iranian plateau. The sensitivity tests of tomography using travel times from 〈span〉C〈/span〉〈sup〉1〈/sup〉 and 〈span〉C〈/span〉〈sup〉1〈/sup〉+〈span〉C〈/span〉〈sup〉3〈/sup〉 indicates that 〈span〉C〈/span〉〈sup〉1〈/sup〉+〈span〉C〈/span〉〈sup〉3〈/sup〉 indeed enhances resolution. In general, results from seismic noise imaging show good agreement with the local geological units. The shear wave velocity sections resulting from the Bayesian inversion of dispersion curves are interpreted along four profiles in different directions in order to cover the main tectonics of Iranian plateau down to 60 km depth.〈/span〉
Print ISSN:
2051-1965
Electronic ISSN:
1365-246X
Topics:
Geosciences
Published by
Oxford University Press
on behalf of
The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
