Analisis Karakteristik Prakiraan Berakhirnya Gempa Susulan pada Segmen Aceh dan Segmen Sianok (Studi Kasus Gempa 2 Juli 2013 dan 11 September 2014)
DOI:
https://doi.org/10.25077/jfu.5.1.73-77.2016Abstract
Telah dilakukan penelitian tentang analisis karakteristik prakiraan waktu berakhirnya gempa susulan di Segmen Aceh dan Segmen Sianok. Metode yang digunakan adalah metode Mogi 2 dan Utsu, dimana nilai-nilai konstanta dari persamaan tersebut ditentukan dengan metode Least Square. Data yang diolah merupakan data gempa susulan yang diperoleh dari BMKG, Padang Panjang. Pada penelitian ini digunakan dua kasus gempa yaitu gempa Aceh 2 Juli 2013 dan gempa Batusangkar 11 September 2014. Waktu berakhirnya gempa susulan untuk Segmen Aceh terjadi pada hari ke-4 dan untuk Segmen Sianok pada hari ke-2. Hasil analisis menunjukkan bahwa gempa di Segmen Aceh dan Segmen Sianok mempunyai tipe gempa yang sama yaitu tanpa adanya gempa pendahuluan. Hasil perhitungan menunjukkan bahwa metode yang sesuai untuk memperkirakan waktu berakhirnya gempa susulan di Segmen Aceh dan Segmen Sianok adalah metode Mogi 2. Hasil prakiraan untuk Segmen Sianok lebih mendekati data aktual daripada Segmen Aceh. Semakin besar magnitudo gempa utama maka semakin lama waktu berakhirnya gempa susulan yang terjadi.
Kata kunci : gempa susulan, Least Square, Mogi 2, Utsu.
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Copyright (c) 2016 Ekarama Putri, Dwi Pujiastuti, Irma Kurniawati
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