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Abstract

Summary

In order to define the precise shallow velocity structure beneath the second largest dam reservoir in Iran and to understand the loading effects on the underlying crust, the shear wave velocity of the shallow structure beneath the Gotvand-e Olya reservoir is determined using continuous data from 10 stations of a local network, installed to monitor the induced seismicity in the region surrounding the Gotvand dam for potential hazard. We obtained Rayleigh waves from cross-correlation of waveforms recorded 10 months before and 15 months after impoundment of the Gotvand reservoir and calculated the group velocity from dispersion analysis in the period range 2–8 s. The group velocity dispersion curves are used to produce 2D group velocity tomographic maps. The obtained results at short periods are well correlated with subsurface geological features and delineate distinct low- and high-velocity zones separated mainly by geological boundaries, indicating on capability of the Ambient Noise Tomography (ANT) technique for detailed study of the velocity structure and lithology at the shallow depth using continuous data from dense local seismic network.

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/content/papers/10.3997/2214-4609.201702118
2017-09-03
2024-04-19

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References

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Ambient Noise Tomography beneath the Gotvand-e Olya Reservoir (South-west of Iran)
Conference Proceedings 2017, 1 (2017); https://doi.org/10.3997/2214-4609.201702118
/content/papers/10.3997/2214-4609.201702118
/content/papers/10.3997/2214-4609.201702118
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