Interpretation of Dynamic Sediment Characteristic Based on Microtremor Analysis in Prambanan Region, Sleman Yogyakarta and Klaten Central Java, Indonesia

Hesti Hesti; Subagyo Pramumijoyo; Djoko Wintolo

doi:10.36435/jgf.v16i1.24

Hesti Hesti Program Paskasarjana, Teknik Geologi, Universitas Gadjah Mada, Yogyakarta, Indonesia
Subagyo Pramumijoyo Teknik Geologi, Universitas Gadjah Mada, Yogyakarta, Indonesia
Djoko Wintolo Teknik Geologi, Universitas Gadjah Mada, Yogyakarta, Indonesia

DOI: http://dx.doi.org/10.36435/jgf.v16i1.24

Keywords

Microtremor, HVSR, Seismic vulnerability, Ground Shear Strain

Abstract

Yogyakarta earthquake on Mei 27, 2006 caused Prambanan area get quite severe damage marked by damage
of resident house and Prambanan Temple.This study was conducted using data of microtremorsingle station and Yogyakarta earthquake 27 May 2006. Data were analyzed with microtremor HVSR methods to get the value of the dominant frequency (fo) and amplication (Ao).Furthermore, calculated the value of peak ground acceleration (PGA) in the layers of sedimen bedrock and seismic vulnerability index (Kg) to get ground shear strain value. Prambanan area has a dominant frequency (fo) value ranges from 0.63-6.78 Hz. Ground shear strain valueranges from 3,55.10^-5 - 4,04.10^-2.Each of these factors is then mapped with a division of 4 zones is very high, high, medium, and low.Based on the analysis of all these factors Prambanan area is an area that is vulnerable to the risk of earthquake events.

References

2009, Efek Tapak Lokal (Local Site Effect) di Graben Bantul Berdasarkan Pengukuran Mikrotremor, International Conference Earth Science and Technology, Jurusan Teknik Geologi, Fakultas Teknik, UGM. h:119-124.
Djumarma, A., Soehaimi, A., dan Mariyono, 2010, Geoseismic Research Concerning The Safeguard from The Earthquake Hazards to the world heritage of Prambanan Temple, Bulletin Vulkanologi dan Bencana Geologi, Vol. 5 No.2, Agustus 2010 : 7-13.
Destegul, U., 2004, Sensitivity Analysis of Soil Site Response Modelling in Seismic Microzonation for Lalitpur Nepal, Enschede: Netherlands.
Fukushima, Y., dan Tanaka, T., 1990, A new attenuation relation for peak horizontal acceleration of strong earthquake ground motion in Japan.Bulletin of the Seismological Society of America, 80(4),August 1990 :757783.
Ishihara, K., dan Ansal, A. M., 1982, Dynamic Behavior of Soils, Soil Amplification and Soil Structure Interaction, UNESCO.
Lang, D.H., dan Schwarz, J., 2004, Instrumental Subsoil Clasiffication of Californian Strong Ground Motion SiteBased on Single Measurments, Volume 1,pp.6.
Nakamura, Y., 1996, Real Time Information Systems for Seismic Hazards Mitigation UrEDAS, HERAS and PIC, Quarterly Report of RTRI, Vol.37, No. 3, 112-127.P.
Nakamura, Y., 1997, Seismic Vulnerability Indices For Ground and Structures Using Microtremor, World Congress on Railway Research in Florence, Italy.
Partono, W., Irsyam, M., Prabandiyani, dan S., Marif, S., 2013, Aplikasi Metode HVSR pada Perhitungan Faktor Amplifikasi Tanah di Kota Semarang, Jurnal Media Komunikasi Teknik Sipil, Vol.19 No 2, Desember 2013: 125-134.
Rahardjo, W., Sukandarrumidi, dan Rosidi, H. M. D., 1995, Peta Geologi Lembar Yogyakarta, Pusat Penelitian dan Pengembangan Geologi, Bandung.
Surono, Toha, B., Sudarno, I., 1992, Peta Geologi Lembar Surakarta-Giritontro, Pusat Penelitian dan Pengembangan Geologi, Bandung.
Zhao, J.X., Irikura, K., Zhang, J., Fukhusima, Y., Somerville,P.G., Asano, A., Saiki, T., Okada, H., dan Takahashi, T., 2004, Site Classification for Strong-Motion Stations in Japan Using H/V Response Spectral Ratio. Paper No. 1278, 13th World Conference on Earthquake Engineering, Canada.