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All Journal Journal of Geoscience, Engineering, Environment, and Technology
Akmal Ferdiyan
Physics Department, Faculty of Matehemathics and Natural Science, Universitas Jenderal Soedirman, Jl. Dr. Soeparno No. 61, Purwokerto, Central Java, Indonesia.
Earth & Planetary Sciences Engineering Environmental Science Physics

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The Soft Layer Thickness Estimation using Microtremor Measurement to Identify Landside Potential in Watukumpul, Central Java, Indonesia. Urip Nurwijayanto Prabowo; Akmal Ferdiyan; Ayu Fitri Amalia
Journal of Geoscience, Engineering, Environment, and Technology Vol. 6 No. 1 (2021): JGEET Vol 06 No 01 : March (2021)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2021.6.1.5436

Abstract

Watukumpul is an area that is prone to landslides, so determining the soft layer thickness is very important to identify the landslide potential. The soft layer thickness can be estimated using microtremor signal measurements which analyzed using the Horizontal to Vertical Spectral Ratio (HVSR). In this study,we measured microtremor signal of 33location around Watukumpul, Pemalang, Central Java area to determine soft layer thickness. Micretremor signal was analyzed based on theHVSR method using Geopsy software and follow the standard of the Sesame Europan Project. The results of the HVSR method are the HVSR curve that fulfills the reliable curve standard. HVSR curve shows that the dominant frequency of soft layer ranges from 1.36 – 7.62 Hz and the amplification values ranges from 9.00 – 41.45. The soft layer thickness value in the study area ranges from 17.58 - 103.60 meters. The high landslide potential area are located at W7, W8, W18, W30 and W32 where has thin soft layer and high soil slope.
Co-Authors Ayu Fitri Amalia Urip Nurwijayanto Prabowo