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Identification of ground motion prone areas triggering earthquakes based on microtremor data in Jati Agung District, South Lampung Regency, Lampung, Indonesia
Yohana Noradika Maharani (a*), Arif Rianto Budi Nugroho (b), Dzikrina Farah Adiba (a), Iin Sulistiyowati (a)

(a) Institut Teknologi Naisonal Yogyakarta, Jalan Babarsari, Caturtunggal, Depok, Sleman, Yogyakarta (b) Institut Teknologi Sumatera, Ryacudu Bypass, Way Hui, Jati Agung, South Lampung, Indonesia (c) Kwansei Gakuin University, japan


Jati Agung District is an area planned by the Lampung government to become a new city of the central government in Lampung. Aspects of city planning include aesthetics and safety. The geophysical study is conducted as disaster mitigation efforts to make the city have a good level of safety. The purpose of this study is to measure earthquake activities in the research areas that could be developed as data in disaster mitigation. The geophysical study was conducted by measuring the microtremor at 15 points. The microtremor signal is processed by the HVSR method to obtain information on natural frequency and amplitude. Natural frequencies and amplifications were analyzed to obtain the Peak Ground Acceleration (PGA) and Ground Shear Strain values. The results of PGA values and Ground Shear Strains indicate indications of soil fracture-prone areas. The results showed that the PGA value was 12.34638 gal to 22.18974 gal, while the Ground Shear Strain value was 53.34322x10-6 to 729.6847x10-6.

Keywords: Earthquake; geophysics; PGA; Ground Shear Strain; microtremor

Topic: Disaster Management and Environmental Issues


Conference: The 2nd International Conference on Earth Science, Mineral, and Energy (ICEMINE 2019)

Plain Format | Corresponding Author (BIMA PRABAWA DEWA GEDE)

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