ANALISIS KETEBALAN LAPISAN SEDIMEN DAN INDEKS KERENTANAN SEISMIK KOTA JAMBI BAGIAN TIMUR

Authors

  • Arie Satria Program Studi Teknik Geofisika Fakultas Sains dan Teknologi Universitas Jambi, Indonesia
  • Ichy Lucya Resta Dosen Program Studi Teknik Geofisika Fakultas Sains dan Teknologi Universitas Jambi, Indonesia
  • Nasri MZ Dosen Program Studi Teknik Geofisika Fakultas Sains dan Teknologi Universitas Jambi

DOI:

https://doi.org/10.23960/jge.v6i1.58

Keywords:

microtremor, sediment layer thickness, seismic vurnerability index

Abstract

A Research was carried about analysis of sediment layer thickness and seismic vulnerability index in eastern Jambi City. The purpose of this research was to  determine the effect of sediment layer thickness on seismic vulnerability index in eastern Jambi City based on microtremor data. The Acquisition data of microtremor is 25 points spread in research area. Processing data was carried out using the HVSR (Horizontal to Vertical Spectra Ratio) method to obtain the H/V curve. This curve represents the value of the natural frequency (f0) and amplification factor (A0). Based on the results of data processing obtained, the range of natural frequency (f0) value is 1.04 – 3.78 Hz, the range of amplification factor (A0) value is 1.13 - 4.88 times, the range of sediment layer thickness (h) value is 16.46 – 61.45 meters, and the range of seismic vulnerability index (Kg) value is 0.70 - 20.18×10-6 cm2/s. The results showed that the distribution of seismic vulnerability index (Kg) correlated relatively well with sediment layer thickness of the research area. The high zone of seismic vulnerability index (Kg) is relatively associated with alluvial deposits and also the sediment layer thickness of more than 30 meters. The high zone of seismic vulnerability index (Kg) is concentrated in Pasir Panjang, Tanjung Raden to Olak Kemang in Danau Teluk sub-district and Tanjung Sari in Jambi Timur sub-district.

References

Arifin, S. S., Mulyatno, B. S., Marjiyono dan Roby Setianegara. 2014. Penentuan Zona Rawan Guncangan Bencana Gempabumi Berdasarkan Analisis Nilai Amplifikasi HVSR Mikrotremor dan Analisis Periode Dominan Daerah Liwa dan Sekitarnya. Universitas Lampung. Bandar Lampung.

Edwiza, D dan Novita, S. 2008. Pemetaan Percepatan Tanah Maksimum dan Intensitas Seismik Kota Padang Panjang Menggunakan Metoda Kanai. Vol. 2 No.29, pp. 111-118. Universitas Andalas: Padang.

Handayani, L., Mulyadi, D., Dadan, D., Wardhana, dan Wawan H. Nur, 2009. Percepatan Pergerakan Tanah Maksimum Daerah Cekungan Bandung: Studi Kasus Gempa Sesar Lembang. JSDG Vol 19.

Hartati, Lidia. 2014. Pemetaan Tingkat Resiko Gempabumi Daerah Liwa dan Sekitarnya Berdasarkan Pengukuran Mikrotremor. Thesis. Yogyakarta: UGM.

Kanai, K. 1983. Seismology in Engineering. Tokyo University: Japan.

Laberta, Septian. 2013. Mikrozonasi Indeks Kerentanan Seismik Berdasarkan Analisis Mikrotremor di Kecamatan Jetis, Kabupaten Bantul, Daerah Istimewa Yogyakarta. Yogyakarta: UNY.

Mangga, S. A., Santoso, S., dan Herman, B. 1993. Peta Geologi Lembar Jambi Sumatera. Pusat Penelitian dan Pengembangan Geologi, Bandung, Jawa Barat.

Nakamura, Y. 2000. Clear Indentification of Fundamental Idea of Nakamura’s Technique and Its Application. Tokyo University. Japan.

Pemerintah Kota Jambi. 2018. Kecamatan dan Kelurahan. Diakses 03 September 2018, dari Pemerintah Kota Jambi: https://jambikota.go.id/new/kecamatan-dan-kelurahan/

Refrizon.

Hadi, A.I., Lestari, K. dan Oktari, Tria. 2013. Analisis Percepatan Tanah Maksimum dan Tingkat Kerentanan Seismik Daerah Ratu Agung Kota Bengkulu. Lampung. Prosiding Semirata FMIPA UNILA.

Saaduddin, Sismanto & Marjiyono. 2015. Pemetaan Indeks Kerentanan Seismik Kota Padang Sumatera Barat Dan Korelasinya Dengan Titik Kerusakan Gempabumi 30 September 2009. Jurnal Kebumian Ke-8, pp. 459-466. Universitas Gajah Mada: Yogyakarta.

Seed, H.B., dan Idriss, I.M. 1971. Simplified procedure for Evaluating Soil Liquection Potential. Journal of the Soil Mechanics and Foundation Divison. 1971.

SESAME. 2004. Guidelines For The Implementation Of The H/V Spectral Ratio. Technique on Ambient vibrations. Europe: SESAME Europe research project.

Setiawan. J. R. 2009. Mikrozonasi Seismisitas Daerah Yogyakarta Dan Sekitarnya. Tesis. Bandung: Institut Teknologi Bandung.

Solikhin, A. & Suantika, G., 2008, Laporan Penyelidikan Gempabumi Daerah Kabupaten Bandung dan Sekitarnya Jawa Barat. Pusat Vulkanologi dan Mitigasi Bencana Geologi: Bandung.

Wisnu, & Nazirman. 1997. Geologi Regional Sumatera Selatan. Pusat Survei Geologi. Badan Geologi Kementerian ESDM, Bandung.

Downloads

Additional Files

Published

2020-03-18

How to Cite

Satria, A., Resta, I. L., & MZ, N. (2020). ANALISIS KETEBALAN LAPISAN SEDIMEN DAN INDEKS KERENTANAN SEISMIK KOTA JAMBI BAGIAN TIMUR. JGE (Jurnal Geofisika Eksplorasi), 6(1), 18–30. https://doi.org/10.23960/jge.v6i1.58

Issue

Vol. 6 No. 1 (2020)

Section

Articles

Citation Check

License

Authors/Readers/Third Parties can read, print and download, redistribute or republish the article (e.g. display in a repository), translate the article, download for text and data mining purposes, reuse portions or extracts from the article in other works, sell or re-use for commercial purposes, remix, transform, or build upon the material, they must distribute their contributions under the same license as the original Creative Commons Attribution-NonComercial (CC BY-NC).

Similar Articles

1 2 3 4 5 > >> 

You may also start an advanced similarity search for this article.