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Moho Mapping of Northern Chile Region Using Receiver Function Analysis and HK Stacking

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Recent Developments in Earthquake Seismology

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Abstract

In this study, Rfpy software is utilized to compute the receiver functions to map Moho in the Northern Chile region. To obtain the teleseismic waveforms within an epicentral distance of 30° to 90°, the Package makes use of the IRIS station database. The receiver functions over stations AC04 and AC05 indicate a low-velocity layer possible area at a shallower depth. Additionally, the delay periods of the Moho Ps phase at various different back azimuths are used to infer the anisotropy or dipping Moho. With the aid of H-K Stacking the receiver functions for Poisson’s ratio and Moho depth were also inverted. Under the AC07 station, which is situated in Caldera, Atacama, a higher Moho depth of 46 km is discovered. This results in a Poisson’s ratio of 0.24. Below the CO10 station, which is in Coquimbo, an extraordinary poisson ratio is found. Accordingly, a Moho depth of 25 km is discovered. Inverting the acquired P-wave receiver functions may effectively determine the S-wave velocity structure below each station. This would aid in enhancing the region’s crustal imaging. Additionally, harmonic decompositions of the receiver functions might be performed to examine the behavior of anisotropy.

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Authors and Affiliations

  1. Department of Geophysics, Banaras Hindu University, Varanasi, India

    Amritansh Rai, Rohtash Kumar, Dipankan Srivastava, Raghav Singh, Ankit Singh & S. P. Maurya

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  1. Amritansh Rai
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  2. Rohtash Kumar
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  3. Dipankan Srivastava
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  4. Raghav Singh
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  5. Ankit Singh
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  6. S. P. Maurya
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Editors and Affiliations

  1. Banaras Hindu University, Varanasi, India

    Rohtash Kumar

  2. Banaras Hindu University, Varanasi, India

    Raghav Singh

  3. Veer Bahadur Singh Purvanchal University, Jaunpur, India

    Shyam Kanhaiya

  4. Banaras Hindu University, Varanasi, India

    Satya Prakash Maurya

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Rai, A., Kumar, R., Srivastava, D., Singh, R., Singh, A., Maurya, S.P. (2024). Moho Mapping of Northern Chile Region Using Receiver Function Analysis and HK Stacking. In: Kumar, R., Singh, R., Kanhaiya, S., Maurya, S.P. (eds) Recent Developments in Earthquake Seismology. Springer, Cham. https://doi.org/10.1007/978-3-031-47538-2_6

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