Abstrak -Telah dilakukan penelitian yang menghasilkan sebuah program matlab untuk pengolahan data mikrotremor. Penelitian ini bertujuan untuk menerapkan software matlab ke dalam pengolahan data mikrotremor. Mikrotremor adalah getaran tanah yang dapat mengidentifikasi kerentanan gempa bumi dengan menggunakan metode HVSR (Horizontal to Vertikal Spectral Ratio). Metode HVSR (Horizontal to Vertikal Spectral Ratio) merupakan metode untuk membandingkan dua komponen horizontal terhadap komponen vertikal pada gelombang mikrotremor yang akan menghasilkan nilai frekuensi dominan (f 0 ) berdasarkan nilai spektrum H/V tertinggi dari analisis kurva HVSR. Berdasarkan dari penelitian tersebut disimpulkan bahwasannya pengolahan data mikrotremor dapat dilakukan dengan software matlab, hasil dari pengolahan data ini akan menghasilkan nilai yang tidak jauh berbeda dengan software geopsy. Nilai frekuensi dominan yang dihasilkan oleh software geopsy dan matlab masuk ke dalam site class jenis 2 yaitu sebagian besar adalah aluvium. Sedangkan dari nilai periode dominan yang dihasilkan oleh software geopsy dan matlab masuk ke dalam site class jenis 1 dengan jenis lapisan tanah yang keras. Abstract -The research has conducted to get the result of Matlab program for microtremor data processing. The purpose of this research is to apply Matlab software into microtremor data processing. The microtremor is the ground motion to identify earthquake vulnerability by using HVSR (Horizontal to Vertical Spectral Ratio) method. The HVSR method for comparing both of horizontal component and vertical component on microtremor wave to obtain the result dominant frequency(f0) based on the high spectrum H/V value from the analysis of HVSR curve. Based on this research which concludes that microtremor data processing has processed using Matlab software. The result of this data processing gives similar value from the geopsy software. The value of dominant frequency by Matlab software and geopsy software calculation are classified on the site class type II which is dominantly alluvium. Whereas, the result of dominant period by geopsy and Matlab are classified on the site class type I which shows as the bedrock.
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