Analisis Kecepatan Gelombang S (Vs) Menggunakan Inversi kurva Horizontal to Vertical Spectral Ratio di Zona Patahan Opak, Bantul, Yogyakarta

Authors

  • Anastasia Kadek Dety Lestari Universitas Timor

DOI:

https://doi.org/10.24114/jiaf.v8i2.35090

Keywords:

Gempabumi, Mikrotremor, Metode HVSR, Vs

Abstract

Model kecepatan bawah permukaan berdasarkan kecepatan gelombang geser (Vs) telah dilakukan di wilayah sesar Opak Bantul memotong ke arah Timur. Model kecepatan diperoleh dengan metode inversi kurva Horizontal-to-Vertical Spectral Ratio (HVSR). Model Vs yang diperoleh di zona patahan Opak Bantul, Yogyakarta menunjukkan adanya struktur patahan dengan bidang miring mengarah ke Timur Model Vs30 menunjukkan bahwa daerah bagian Barat dan Timur patahan Opak berasosiasi dengan endapan sedimen lunak. Endapan sedimen lunak tersebut dapat menyebabkan kerusakan yang signifikan jika terjadi getaran akibat pergeseran patahan (gempa bumi). Pada daerah bagian Timur Sesar Opak terjadi peningkatan nilai Vs yang menunjukkan adanya lapisan keras dari Formasi Nglanggran.

References

Anggraini, A. (2013). Yogyakarta Earthquake, Aftershocks and Interactions. Disertasi.

Bappenas. (2006). Preliminary Damage and Loss Assessment Yogyakarta and Central Java Natural Disaster (Issue June, p. 140). http://siteresources.worldbank.org/INTINDONESIA/Resources/226271-1150196584718/PackageJune13_HIRES_FINAL.pdf

Nakano, M., Kumagai, H., Miyakawa, K., Yamashina, T., Ishida, H., Aoi, S., Morikawa, N., & Harjadi, P. (2006). Source Estimates of the May 2006 Java Earthquake (pp. 493“494). EOS, Vol. 87, No. 45.

P.Tregoning, Brunner, F. K., Bock, Y., Puntodewo, S. S. O., McCaffrey, R., Genrich, J. F., Calais, E., Rais, J., & C.Subarya. (1994). First geodetic measurement of convergence across the Java Trench (pp. 2135“2138). Geophysical Research Letters, Vol. 21, No. 19.

Purnama, A. Y., Nurcahya, B. E., Nurhanafi, K., & Perdhana, R. (2021). Mikrozonasi Berdasarkan Data Mikrotremor dan Kecepatan Gelombang Geser di Kotamadya Yogyakarta. Positron, 11(2), 86. https://doi.org/10.26418/positron.v11i2.46860

Supartoyo, Abdurahahman, O., & Kurnia A. (2016). Gempa Yogyakarta 10 Tahun. In Geomagz (Vol. 6, Issue 2, pp. 18“23).

Tsuji, T., Yamamoto, K., Matsuoka, T., Yamada, Y., Onishi, K., Bahar, A., Meilano, I., & Abidin, H. Z. (2009). Earthquake fault of the 26 May 2006 Yogyakarta earthquake observed by SAR interferometry (pp. e29“e32). Earth Planets Space.

Downloads

Published

2022-06-30

Issue

Vol. 8 No. 2 (2022): JURNAL IKATAN ALUMNI FISIKA UNIMED EDISI APRIL - JUNI 2022

Section

Articles

License

Copyright (c) 2022 JURNAL IKATAN ALUMNI FISIKA UNIVERSITAS NEGERI MEDAN

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors who publish with this journal agree to the following terms:

    1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

    1. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.

  1. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).