Integrated Analysis of Microtremor Horizontal to Vertical Spectral Ratio, Surface Waves Dispersion Curve, and Seismic Refraction Tomography to Estimate Weathered Layer Thickness and Seismic Vulnerability: Case Study Kalirejo Village, Kokap Sub-District, Kulon Progo Regency
Anna Wahyu(1*), Ade Filla Intan(2), Arddhiles Adhitama(3), Febrian Nur Fadhli(4), Ferda Elita Putri(5), Gunarta Sutantio(6), Henest Paskah(7), Intan Permata Sari(8), Kirana Ndaru Pertiwi(9), Luthfan Kin Gumandar(10), Milya Dwi Lestari(11), Naufal Abdila(12), Neneng Alif Karlina(13), Nita Utami(14), Patria Ufaira Aprina(15), Reymon Arga Medika(16)
(1) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(2) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(3) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(4) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(5) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(6) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(7) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(8) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(9) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(10) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(11) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(12) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(13) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(14) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(15) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(16) Geophysics Sub-Department, Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
(*) Corresponding Author
Abstract
Subduction of Indo-Australia plate to Eurasia plate and locally active fault nearby Kulon Progo play as major source for earthquake events. After effect due to earthquake has different level of damage which depend on the magnitude and site characteristics. The horizontal-to-vertical spectral ratio (HVSR) passive seismic method is being used drastically to help in mapping the level of site vulnerability to earthquake event. HVSR analysis results help us acquire some physical values including weathered layer thickness where Vs 30 reference came from surface waves dispersion curve analysis of the MASW method as it is used as a parameter in calculating thickness value. Seismic refraction tomography is used to create subsurface model thus we may see the extent of underlying layer and its implication to earthquake event.
Data measurements distribution are scattered in Kalirejo Village with the total of 63 passive seismic data, 33 MASW data, and 7 lines of seismic refraction acquisition. Some data show inadequate quality to be taken into further processing step, so data sorting activity should be carefully done. As a result, 21 of 63 passive seismic data are considered adequate to represent site physical values. Dominant frequency values ranging from 2 to 20 Hz, amplification factor varies between 1.5-12.5, and seismic vulnerability indices varies between 0.3-20. Surface waves dispersion curve inversion results are Vs 30 values ranging from 350 m/s to 980 m/s and seismic refraction tomography model shows Vp model with velocity values ranging from 0.2 to 3.2 km/s.
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- Krishna S, Etal. Geodynamics of The Indian Lithospheric Plate Relative to the Neighbouring Plates As Revealed By Space Geodetic Measurements. Int Arch Photogramm Remote Sensing, Spat Inf Sci. 2014;40(8):53{56.
- Natawidjaja DH. Misteri Patahan Sumber Gempa Yogya 2006; 2016. Available from: http://geomagz.geologi.esdm.go.id/misteri- %0Apatahan-sumber-gempa-yogya-2006/.
- Wibowo, Sembri. Analisis Seismisitas dan Energi Gempabumi di Kawasan Jalur Sesar Opak-Oyo Yogyakarta. Indones J Appl Phys. 2017;7(2):82.
- Bormann P. New Manual of Seismological Observatory Practice (NMSOP). 1st ed. Postdam: GeoForschungsZentrum Postdam; 2002.
- Nakamura Y. A Method for Dynamic Characteristics Estimation of Subsurface. Quaterly Reports Railw Tech Res Inst. 1989;30(1).
- Research Project SE. Guidelines for The Implementation of The H/V Spectral Ratio Technique On Ambient Vibrations Measurements, Processing, and Interpretation. European Commission-Research General Directorate; 2004.
- Wahyuni S, Yulianto G, Nuwidyanto MI. Interpretasi Data Seismik Refraksi Menggunakan Metode Reciprocal Hawkins dan Software SRIM (Studi kasus daearh Sioux Park, Rapid City, South Dakota, USA). Berk Fis. 2006;9(4):177{184.
- Kesarwani A, Sharma A, Jain C. MASW versus Refraction Seismic Method in terms of acquisition and prcoessing of data and the accuracy of estimation of velocity profiles. In: 9th Bienn. Int. Conf. Expo. Pet. Geophys. Dhanbad; 2012.
- Telford WM, Geldart LP, Sheriff RE. Applied Geophysics. 2nd ed. Cambridge: Cambridge University Press; 1990.
- RSK Geophysics Nd. Seismic Refraction. Hemel Hepsted: RSK Geophysics;
- Kanh AI, al E. Vs30 mapping and soil classification for seismic site effect evaluation in Dinar region. Geophys J Int. 006;165(1):223{235.
- Park CB, Miller RD, Xia J, Ivanov J. Multichannel analysis of surface waves (MASW) - active and passive methods. Lead EDGE. 2007;26(1).
- Park CB, Miller RD, Xia J. Multichannel analysis of surface waves. GEOPHYSICS. 1999;64(3):800{808.
- Nakamura Y. Seismic Vulnerability Indices for Ground and Structures Using Microtremor. In: World Congr. Railw. Res. Florence; 1997.
DOI: https://doi.org/10.22146/jfi.v22i3.55648
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