ANALISIS DEFORMASI GUNUNGAPI MERAPI DENGAN METODE GEODETIK-GPS

• Main Author: MA'RUF, BILAL
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/1707
• Institution: Institut Teknologi Bandung

Understanding of magmatic phenomena and monitoring of <br /> Merapi Volcano will require a deformation study. Deformation study is a <br /> multidiscipline study. Geodesy is one of a discipline that deals with <br /> deformation from geometric point of view, in terms of determining the <br /> magnitude, pattern, and parameters of the deformation. The well known <br /> geodetic method which is used in monitoring the deformation of Merapi <br /> Volcano is Global Positioning System (GPS). <br /> This research emphasizes on the analysis of deformation of <br /> Merapi Volcano with the geodetic method using GPS surveys. GPS <br /> monitoring network is established covering the body of Merapi Volcano <br /> and its surrounding. The coordinates of the points of the monitoring <br /> network obtained from GPS surveys, are used to determine the magnitude <br /> and direction of the vector displacements of the points. These vector <br /> displacements are useful information for developing the model of <br /> deformation analysis which then is used to determine deformation <br /> parameters of Merapi Volcano. <br /> This research concludes that, 1) the single frequency GPS <br /> receiver can be used to monitor the deformation of Merapi Volcano, 2) <br /> during the period of November 1996-March 1998, Merapi Volcano had <br /> exploded twice and deformed. This can be proved from geodetic and <br /> physics points of view. From the geometric point of view the magnitude <br /> of vector displacement, deformation parameters, as well as the principal <br /> strain show significance values; while from physics point of view Merapi <br /> shows the growing dome and it has exploded twice in January 17, 1997 <br /> and July, 1998, 3) the characteristics of deformation can be geometrically <br /> useful to predict the physical activities of Merapi Volcano, 4) the study of <br /> deformation model of Merapi Volcano can be approached by two models. <br /> The first is a model that includes translation, strain and rotation, while the <br /> second one is a model that includes just strain and rotation (no <br /> translation). Based on geological and geophysical information, the second <br /> model seems to be more realistic for describing the deformation of <br /> Merapi Volcano.