Analisis Mikrotremor dan Mikrozonasi dengan Menggunakan Metode Horizontal to Vertical Spectral Ratio (HVSR) di Daerah Lampung

Abstract

Microtremor, also known as ambient noise, is a vibration that occurs on the ground with a micro or very small amplitude and is caused by natural and human factors. The study used microtremor data spread over the Lampung region, especially the western part with total of 11 measurement stations, and also used Vs30 data available on the United States Geological Survey (USGS) website. Data processing is carried out using the HVSR method to get the value of the Dominant Frequency / f0, and the value of Amplification/A0, then from this value, the value of the Seismic Vulnerability Index/Kg and Sediment Thickness / H is calculated. The results of the study obtained in the research area has a f0 value of 0.68 – 11.2 Hz, A0 values range from 1.6 – 5.9. the value of Kg calculated is 0.06 – 7.29 x 10^(-6) (s^2/cm). Vs30 values obtained from USGS in the study area ranged from 247-683 m/s. Furthermore, the value of H obtained is 7.23-123 m