The Influence of Seismic Activity in South Sulawesi Area to the Geomor-phology of Jeneberang Watershed

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Author(s) Muhammad Altin Massinai | Adjat Sudradjat | Lantu
Pages 945-948
Volume 3
Issue 10
Date October, 2013
Keywords seismic activity, Jeneberang watershed, geomorphology.

Abstract

Seismicity is one of the parameters of tectonic activity in a region. Jeneberang watershed in South Sulawesi is the clean water source for the cities of Makassar and Sungguminasa. seismic activity of Jeneberang watershed in the southern part of South Sulawesi arm seemed dominated by shallow earthquakes (depth less than 60 kilometers) and medium-sized earthquakes (depths between 60-300 kilometers). Distribution of earthquakes with intermediate depth look at coordinates 119,15o - 120,15o E and 4,8o - 5,5o S. Earthquakes that occur on land with a shallow depth due to the faults activity in the South Arm of Sulawesi. The position of the source of the earthquake at a depth of 500 km - 800 km is at coordinates 119,55o - 120,15o E and 5,0o - 5,4o S. This position is located on the southern arm of Sulawesi mainland. This earthquake is associated with a trench the sea floor spreading in the Makassar Strait and the Gulf of Bone. The trenchs on subduction zone to characterize the lithosphere. Seismisitas activity shows a subduction zone of the sea floor spreading in the Makassar Strait and the Gulf of Bone. Seismisitas activity indicates two zones of sea-floor spreading which makes the southern arm of Sulawesi have compression (compression). It also indicates the southern Sulawesi geomorphology including the Jeneberang watershed is significantly influenced by active tectonics.

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