Identification of Engineering Bedrock in Jakarta by Using Array Observations of Microtremors

• DOI: 10.1016/j.proeps.2015.03.040
• Publication Date: 2015-05-17T13:00:32Z
• Authors: Mohamad Ridwan; Sri Widiyantoro; Afnimar; Masyhur Irsyam
• Keywords: Bedrock; Microtremor; Wave velocity

The bedrock depth is one of the most important parameters in seismic hazard analysis. This parameter has not been identified well Jakarta. study was conducted to determine Jakarta based on S-wave velocity parameters. Microtremors array method applied this obtain 1D and 2D profiles. spatial autocorrelation (SPAC) used estimate dispersion curves, while structure derived by genetic algorithm. Reffering geological condition area, microtremors measurements were for two East-West lines northern southern parts result construction shows stratigraphy cross sections that consists four layers, where depths can be depicted range from 519 662 m part 353 399 m. It a positive correlation with local i.e sediment thickness increases north.