Perpustakaan Digital ITB

The aim of this undergraduate thesis is to quantify the mechanism of Lembang Fault characteristic through strain analysis. Data used in this research are GPS observations data spans from 2006 to 2015. Data used in this undergraduate thesis are processed using GAMIT 10.6 to obtain coordinates at each GPS observation points. The next step is coordinate transformation from ITRF2008 to ITRF2000 and velocity calculation in ITRF2000. After every station is free from Sundaland block movement, these stations are referenced to CLBG station. It is assumed that this station represents the fault movement. Proceed to the strain calculation using delaunay triangulation once the significance test using t-student is done. Lastly, strain analysis is executed. Results are used to estimate velocity and strain rate from 2006 to 2015 GPS data. Later on, these results be used as the aspects of strain analysis. Results showed that the horizontal velocity vector at observation points around the fault varied up to 6 mm/year with different movements between northern and southern part of the fault. Northern part of the fault tends to move northwestward, while the southern area of Lembang Fault moves to the southeast. The existence of strain of about 0.5 microstrain around the Lembang Fault indicates that the fault is still active. Strain pattern formed indicates fault divided into several segments, namely northwest with indication of the motion is oblique faulting, middle part with strike-slip faulting, and southeast with normal faulting.