AMPLIFIKASI GEMPABUMI DAERAH SUBANG JAWA BARAT

Nani Setiani

Abstract


Geological and topographical conditions of Subang Regency complex causes of this area has huge potential earthquake. With microzonation method, the base layer frequency and wave
amplitude of the can be known. The amplitude of the wave is the value of amplification. Amplification or strengthening of earthquake waves can occur because of differences in
density and velocity in sedimentary rocks which is above the basement. Amplification in Subang Regency has levels 1 to 5 times. Amplification value was highest in low plain areaswith soil-forming rock types of sedimentary rocks form coastal sediment, floodplains sediment(QAC), and plan with tuff rock types of sand, lava, pumice tuff rock (Qyt) and unrefined sediment. The amplification value is also influenced by the thickness of the sediment layer, and the elevation and slope.

Keywords : microzonation, amplification.


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