PROBABILITAS PERCEPATAN PUNCAK TANAH PADA GEMPA SIGNIFIKAN DAN MERUSAK WILAYAH NTT

Samsul Hasibuan, Rahmawati Hasibuan

Abstract


Katalog Gempa Bumi signifikan dan merusak yang di publish oleh BMKG memperlihatkan daerah, koordinat, kedalaman, serta Magnitude yang menyebabkan korban jiwa Manusia hingga kerusakan bangunanan. Menurut BMKG sesar aktif dan megathrust sama-sama memicu terjadinya Gempa Bumi dahsyat. Namun, pada Gempa megathrust bisa memicu Gempa hingga mencapai Magnitude 8-9, sedangkan Gempa sesar aktif hanya memicu Gempa hingga Magnitude 7,5. Meski demikian, tingkat kerusakan akibat Gempa yang ditimbulkan tak hanya tergantung pada berapa besar Magnitude, tetapi juga jarak dengan episentrum, serta kondisi geologi lokal. Makalah ini bertujuan untuk membangun langkah mitigasi bencana, dengan mengetahui probabilitas percepatan puncak tanah (PGA) pada wilayah NTT diharapkan kontraktor sipil maupun arsitektur lebih serius dalam hal ini. Metode teorema probabilitas percepatan puncak tanah (PGA) menggunakan hubungan antara Magnitude dan tingkat keberulangan menurut Gutenberg dan Richter. Selanjutnya fungsi atenuasi dianalisis menurut Boore dkk.

Kata kunci: Gempa Bumi, Magnitude, NTT, Probabilitas PGA (g)


PROBABILITY OF THE PEAK GROUND ACCELERATION OF SIGNIFICANT EARTHQUAKE AND DAMAGES IN NTT REGION

Significant earthquake and damages catalog published by BMKG show the area, coordinates, depth and magnitude that causes human casualties and cause damage to buildings. According to the BMKG the active fault and megathrust both cause extraordinary earthquakes. However, m

megathrust earthquakes can cause earthquakes to reach Magnitude 8-9, whereas active fault quake only cause an earthquake to reach Magnitude 7,5. Even so, the level of damage caused by an earthquake caused not only depends on the magnitude, but also the distance to the epicenter, and local geological conditions. This papers aims to develop disaster mitigation measures, by knowing the probability of the peak ground accelerations (PGA) in NTT region, it is expected that civil and architectural contractors will be more serious in this regard. The method of the probability peak ground accelerations (PGA) theorem uses the relationship between magnitude and repeatability according to Gutenberg and Richter. Then the attenuation function was analyzed according to Boore et al.

Keywords: Earthquake, Magnitude, NTT, Probability PGA (g)


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References


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