IDENTIFYING SHALLOW SUBSURFACE CHARACTERISTICS VIA COMPRESSIONAL TO SHEAR WAVES VELOCITY RATIO (VP/VS) FROM SEISMIC REFRACTION TOMOGRAPHY

Authors

  • Muhammad Syukri Geophysics Section, Department of Physics, Faculty of Sciences, Syiah Kuala University, Banda Aceh (Indonesia) http://orcid.org/0000-0003-0122-456X
  • Nordiana M. Muztaza School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia https://orcid.org/0000-0002-7067-5607
  • Nur Azwin Ismail School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia
  • Zul Fadhli Department of Geophysics Engineering, Faculty of Engineering, Syiah Kuala University, Banda Aceh, Indonesia
  • Rosli Saad School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia

DOI:

https://doi.org/10.11113/jurnalteknologi.v83.14990

Keywords:

Seismic refraction, velocity, ratio, tomography, coefficient of determination

Abstract

This study was conducted in Banda Aceh district by utilizing seismic refraction P- and S-waves methods on three similar profile lines, with the aim to identify subsurface characteristic. The seismic data were acquired using ABEM TERRALOC MK8 system with 28 Hz vertical and 6 Hz horizontal geophones, and suitable seismic sources. Software used for processing to produce 2-D tomography sections and interpretations are IXRefract, Microsoft Excel, SeisOpt@2D v6.0 and Surfer 8. The results show the study area comprises of four subsurface layers with strong to very strong relation between Vp and Vs (R2 is >0.7509) for each layer. Ratio value of Vp and Vs (Vp/Vs) for each layer (1st to 4th) was calculated to be 4.75 – 5.79; 6.50 – 8.89; 6.57 – 12.17 and 6.08 – 8.21 respectively. This study concluded that the ground subsurface in Banda Aceh district is made up of water saturated unconsolidated sediments that was identified to be a mixture of clay and silt at depth up to 55 m.

Author Biographies

  • Muhammad Syukri, Geophysics Section, Department of Physics, Faculty of Sciences, Syiah Kuala University, Banda Aceh (Indonesia)

    Physics Department, Faculty of Sciences

    Syiah Kuala University

  • Nordiana M. Muztaza, School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia

    School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia.

  • Nur Azwin Ismail, School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia

    School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia.

  • Zul Fadhli, Department of Geophysics Engineering, Faculty of Engineering, Syiah Kuala University, Banda Aceh, Indonesia

    Department of Geophysics Engineering, Faculty of Engineering, Syiah Kuala University, Banda Aceh, Indonesia.

  • Rosli Saad, School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia

    School of Physics, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia.

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Published

2020-12-07

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Section

Science and Engineering

How to Cite

IDENTIFYING SHALLOW SUBSURFACE CHARACTERISTICS VIA COMPRESSIONAL TO SHEAR WAVES VELOCITY RATIO (VP/VS) FROM SEISMIC REFRACTION TOMOGRAPHY. (2020). Jurnal Teknologi, 83(1), 67-73. https://doi.org/10.11113/jurnalteknologi.v83.14990