Studi Bahaya Seismik dengan Metode Probabilistic Seismic Hazard Analisys di Kabupaten Mentawai
نویسندگان
چکیده
Telah dilakukan penelitian bahaya/hazard gempa bumi untuk Kabupaten Mentawai sebagai daerah dengan resiko bahaya tinggi menggunakan metode probabilictic seismic hazard analysis (PSHA). Data yaitu kejadian rentang tahun 1900-2019 yang diperoleh dari katalog BMKG, ISC, dan USGS. Dilakukan pemisahan utama susulan Garnerd Knopoff. Selanjutnya ditentukan nilai b-value a-value persamaan maximum likelihood. Nilai percepatan gerakan tanah maksimum (PGA) dicari rumus fungsi atenuasi didasarkan pada sumber bobot ketidakpastian logic tree. Hasil sebesar 0,747 menunjukkan banyak terjadi magnitudo kecil di Mentawai. Besar 6,19 menandakan memiliki tingkat seismisitas tinggi. PGA berkisar 0,4-0,7 gal seluruh masing-masing Pulau 0,5-0,7 Siberut, 0,4-0,6 Sipora, 0,4-0,5 Pagai Utara 0,6-0,7 Selatan. Berdasarkan maka didapatkan bahwa sedang keseluruhan Siberut
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ژورنال
عنوان ژورنال: Jurnal Fisika Unand
سال: 2021
ISSN: ['2302-8491', '2686-2433']
DOI: https://doi.org/10.25077/jfu.10.4.532-539.2021