#TITLE_ALTERNATIVE#

• Main Author: Hairani Fitri - Nim: 15114073, Intan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/28073
• Institution: Institut Teknologi Bandung

<p align="justify">Cimandiri is an important active fault located in the region of south Sukabumi, West Java, that extends from Pelabuhan Ratu to Padalarang. However, some researches done with the aim of defining the mechanism of Cimandiri Fault result in various outcome. Dardji et al. (1994) used a kinematic study of bedrock fault to suggest that the Cimandiri Fault is a sinistral strike-slip fault. Haryanto, (2014) concluded that Cimandiri Fault is controlled by two types of mechanisms, thrust fault and normal fault. Marliyani, (2016) interpreted Cimandiri Fault system to be left-lateral oblique with dominant reverse mechanism. Meanwhile, Handayani et al. (2017) concluded Cimandiri Fault as a thrust fault. Therefore this research aims to characterize the current mechanism of Cimandiri Fault from strain pattern around the fault derived from precise positioning data by performing Global Positioning System (GPS) measurement. <br /> <br /> INA-CORS GPS observation was processed using scientific software, GAMIT 10.6. The processing result in GLOBK file is daily geocentric coordinates, geodetic coordinates, and topocetric coordinates for each GPS site in ITRF2008. Those coordinates are then used to calculate velocity vector from each site and strain around Cimandiri Fault. <br /> <br /> Results of principal strain rate vary between 0.00112 until 0.04355 &#956;strain/year for extension, and -0.04201 until -0.00386 &#956;strain for compression. For principal strain around Segment I and II, both compression and extension are dominant with most of the direction of principal strain axes are around 40°. While for Segment III, principal strain around the fault are much more dominated by compression and the direction is around 20°. According to the principal strain rate and velocity pattern around fault, Segment I and II of Cimandiri Fault have sinistral strike-slip mechasnism. While Segment III of Cimandiri Fault has thrust mechanism.<p align="justify"> <br />