Analisis Data Mikrotremor Untuk Mengetahui Nilai Indeks Kerentanan Seismik Di Kecamatan Jambi Luar Kota

Airunisa Airunisa; Ichy Lucya Resta; Ngatijo Ngatijo

doi:10.36435/jgf.v22i1.556

Airunisa Airunisa Universitas Jambi
Ichy Lucya Resta Universitas Jambi
Ngatijo Ngatijo Universitas Jambi

DOI: http://dx.doi.org/10.36435/jgf.v22i1.556

Abstract

Jambi Luar Kota Subdistrict is located in a regional geology which is dominated by sedimentary layers and has the highest population density in Muaro Jambi Regency. The population that continues to increase has resulted in regional development in the form of infrastructure development, shops, roads, housing and high-rise buildings increasing very rapidly. In this development planning, information is needed regarding land conditions and regional stability conditions against the threat of soil movement by identifying the dynamic characteristics of the soil layer which includes the value of the seismic vulnerability index (Kg). The value of Kg was obtained by calculating the values of f_o and A_o from the results of microtremor data processing as many as 61 measurement points using the HVSR method. The f_o values obtained ranged from 0.31 to 6.08 Hz and the A_o values ranged from 0.99 to 2.89. The Kg values obtained ranged from 0.16 to 16.62 with a relatively high distribution of Kg values in Sembubuk Village, Rengas Bandung, Kedemangan, Sarang Burung, Senaung, Penyengat Olak, Sungai Duren, Muaro Pijoan, Mendalo Darat, Mendalo Indah, Mendalo Laut, Muaro Pijoan, and Pematang Jering which show these areas are more susceptible to damage if there is ground movement.

Key words : Microtremor, dominant frequency, amplification, seismic susceptibility index,HVSR

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