The GGMplus data analysis for Modeling of the Kelimutu volcanic subsurface
Keywords:
GGMPlus data, gravity method, Grablox 1.6e, Bloxer 1.6e, densityAbstract
Kelimutu volcano is one of the active volcanoes on
the island of Flores. This study aims to perform
subsurface modeling of the Kelimutu volcano with
3D inversion modeling using the Global Gravity
Model Plus (GGMplus) satellite gravity data in the
form of gravity disturbance data and Earth
Residual Terrain Model (ERTM2160) with a
distance between measurement points of 200 m.
Data processing for gravity disturbance is carried
out in the form of Bouguer correction and Terrain
correction, so that the complete Bouguer anomaly
value is produced. Furthermore, 3D inversion
modeling was carried out using Grablox 1.6e and
Bloxer 1.6e software. 2D modeling results using
Grablox 1.6e show that the surface of the Kelimutu
volcano consists of several types of rock, namely
sandstone with a rock density of 2.02 g / cc,
igneous rock with a type of granite rock and
andesite rock with a rock density of 2.52 g / cc to
2.80 g / cc as well as lava, basalt, diorite, and
granodiorite rocks with a rock density of 2.80 g / cc
to 3.2 g / cc.
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