Modeling Kaligarang fault base on gravity data 2020

0574231 - GFÚ 2024 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Indriana, R. D. - Nurwidiyanto, M. I. - Widada, S. - Mrlina, Jan
Modeling Kaligarang fault base on gravity data 2020.
AIP Conference Proceedings. Vol. 2738. Melville: American Institute of Physics, 2023, č. článku 030037. ISSN 0094-243X. E-ISSN 1551-7616.
[International Seminar on New Paradigm and Innovation on Natural Sciences and Its Application (11th ISNPINSA) /11./. Semarang (ID), 14.10.2021-15.10.2021]
Institucionální podpora: RVO:67985530
Klíčová slova: Kaligarang fault * gravity survey
Obor OECD: Physical geography
https://pubs.aip.org/aip/acp/article-abstract/2738/1/030037/2894312/Modeling-Kaligarang-fault-based-on-gravity-data?redirectedFrom=PDF

The Kaligarang river in Semarang City flows from south to north. Kaligarang river divides Semarang city to be 2 regions. Kaligarang river was formed by the Kaligarang fault. Kaligarang Fault is an active fault that divides young rock in the south of Semarang City to the Java Sea. The activity of fault can trigger earthquakes. Semarang is a crowded city that causes a lot of human activity so the possibility of an earthquake due to fault activity in the future needs to be studied. The research objective is to describe mass distribution beneath Semarang using new gravity data in 2020. The gravity data is 50 data, which focus around the Kaligarang area from south to north. The processing used basic calculation and correction in gravity as latitude, Bouguer, and terrain. The average density was 2.4 g/cc. The inverse modeling in 3-dimensional used Grablox. The research results are a density model beneath Semarang city. The modeling described a fault model beneath The Kaligarang area. The direction of the fault layer is on the north-south and east-west. The density distribution is 2 - 2.85 g/cc. The rock layers are clay and sand rocks above the breccia, lava, and andesite rocks. The density distribution indicates a basin in the central area of the research area to the west and south. the South-West part of the research area has a maximum density. The maximum density on the center area also indicates two faults. The Kaligarang fault is a transform fault. The Kaligarang fault has a South-North direction and turns to the north-west. Gombel fault (east-west normal Fault) become cut and shift to the north.
Trvalý link: https://hdl.handle.net/11104/0344573