| Popis: |
This research was the preliminary study of the receiver function in Halmahera area using 34 temporary and 1 permanent broadband sensors. The calculation of the receiver function uses 3 component seismic signals which are then rotated to component Z (vertical), R (radial), T (tangential). Receiver function is obtained from the division of component R with component Z in frequency domain which then divided by water level algorithm and multiplied by the gaussian filter. The width of the gaussian filter window in this study used 0.5, 1 and 2.5 seconds. The inversion was conducted using the initial model of the 1-dimensional velocity model with a gradual change in velocity of 2 km, 5 km, and 10 km. The inversion velocity structure is used in interpreting the thickness of the earth’s crust. This study successfully imaged the thickness of the earth’s crust at Halmahera which varies from 24 km to 42 km. This study also produced local velocity model that can be used as references to other geophysical inversions.This research was the preliminary study of the receiver function in Halmahera area using 34 temporary and 1 permanent broadband sensors. The calculation of the receiver function uses 3 component seismic signals which are then rotated to component Z (vertical), R (radial), T (tangential). Receiver function is obtained from the division of component R with component Z in frequency domain which then divided by water level algorithm and multiplied by the gaussian filter. The width of the gaussian filter window in this study used 0.5, 1 and 2.5 seconds. The inversion was conducted using the initial model of the 1-dimensional velocity model with a gradual change in velocity of 2 km, 5 km, and 10 km. The inversion velocity structure is used in interpreting the thickness of the earth’s crust. This study successfully imaged the thickness of the earth’s crust at Halmahera which varies from 24 km to 42 km. This study also produced local velocity model that can be used as references to other geophysical inversions. |
