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Model parameter estimation and its uncertainty for 2-D inclined sheet structure in self-potential data using crow search algorithm

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A Correction to this article was published on 11 January 2021

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Abstract

Fracture or fault can control several geological or geophysical events and exploration, where the fault associated with mineralization or fluid flow can be used as a source for Self-Potential (SP) anomaly. The 2-D inclined sheet can be used for modeling for fault interpretation using SP data. In this paper, the improved crow search algorithm (ICSA) using Levy flight is proposed for SP data inversion in determining SP model parameters. In order to evaluate ICSA, the ICSA is compared with standard crow search algorithm (CSA) for determining synthetic SP data that contains multiple anomalies with inclined sheet type structures. It was found that CSA is more explorative than ICSA, and both algorithms can estimate the posterior distribution model (PDM) of SP data. Using uncertainty analysis within the applied threshold in the objective function, both algorithms are reliable to determine PDM. Furthermore, ICSA is tested and implemented to both synthetic and field of SP anomalies for providing the posterior distribution model of SP parameters. The experimental results demonstrate that the ICSA is feasible and effective for determining model parameters and its uncertainty of mono- and multi-SP anomalies. Furthermore, estimating both model parameter and its uncertainty are sufficient for validation with previous researchers. Finally, the interpretation of multiple anomalies in SP anomaly crossing the Grindulu Fault in Pacitan, East Java, Indonesia, is analyzed.

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  • 11 January 2021

    In subtitle “Tambakrejo SP anomaly, Indonesia”, page 710, for describing Fig. 13 written: “Besides those two faults, the inversion data result also produce four other minor faults with different position (Fig. 13 lower panel)” should be revised as “Besides those two faults, the inversion data result also produce seven other minor faults with different position (Fig. 13 lower panel)”.

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Acknowledgements

Authors would like to thank students on the Geophysics Laboratory, Department of Physics, Institut Teknologi Sepuluh Nopember (ITS), for their help in the data acquisition. This work is supported by the Institute for Research and Community Services of ITS (Grant No: 1060/PKS/ITS/2019).

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Correspondence to Arif Haryono or Sungkono.

Appendix A: Pseudo-code of ICSA or CSA

Appendix A: Pseudo-code of ICSA or CSA

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Haryono, A., Sungkono, Agustin, R. et al. Model parameter estimation and its uncertainty for 2-D inclined sheet structure in self-potential data using crow search algorithm. Acta Geod Geophys 55, 691–715 (2020). https://doi.org/10.1007/s40328-020-00321-5

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  • DOI: https://doi.org/10.1007/s40328-020-00321-5

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