Jurnal
MIKROZONASI KAWASAN RAWAN BENCANA GEMPABUMI DENGAN STUDI PEAK GROUND ACCELERATION MENGGUNAKAN METODE BOORE ATKINSON DAN DATA MIKROTREMOR DI DAERAH KUPANG
JURNAL GEOCELEBES · Vol. 1 No. 1 (2017) · pp. 5–12
- ISSN
- 2579-5546, 2579-5821
- Published
- 2017-05-02
- Publisher
- Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar
- Language
- en
Abstract
AbstrakLetak geografis Indonesia yang berada pada pertemuan tiga lempeng tektonik utama; Lempeng Indo-Australia, Lempeng Eurasia dan Lempeng Pasifik, menjadikan Indonesia sebagai kawasan rawan gempabumi. Berdasarkan data yang dirilis oleh Direktorat Vulkanologi dan Mitigasi Bencana Geologi (DVMBG) terdapat 28 wilayah rawan gempa dan tsunami termasuk Kupang. Kupang terletak di zona busur sangat aktif dan tepian benua aktif. Kegiatan tektonik yang berlangsung saat ini dicirikan dengan kejadian gempa tektonik yang melanda daerah pedalaman, akibat dari aktifnya sesar-sesar yang terdapat di perbukitan sekitar Kota Kupang. Salah satu upaya mitigasi yang dilakukan adalah pengukuran mikrotremor menggunakan metode HVSR (Horizontal to Vertical Spectral Ratio) untuk mengetahui nilai frekuensi dominan yang akan menjadi penentu tingkat kerawanan bencana gempabumi. Nilai frekuensi dominan akan menghitung nilai kecepatan gelombang S hingga kedalaman 30 meter (Vs30) yang selanjtnya digunakan untuk menentukan nilai PGA dan amplifikasi. Hasil analisis data menunjukkan bahwa nilai periode dominan berada pada rentang 0.1-0.97 sekon, nilai PGA antara 92.87-142.84 gal dan nilai amplifikasi adalah 0.99-4.38 dan 2.12-9.43 kali. Maka dapat disimpulkan bahwa daerah penelitian termasuk kategori rawan bencana gempabumi terutama pada bagian tenggara.Kata Kunci: Amplifikasi, Mikrotremor, Periode Dominan, PGAAbstractGeographically, Indonesia located at the meeting of three major tectonic plates; Indo-Australian Plate, Eurasian Plate, and Pacific Plate, that make Indonesia as earthquake-prone area. Based on data released by the Directorate of Volcanology and Geological Hazard Mitigation (DVMBG), there are 28 earthquake and tsunami prone areas including Kupang that the area located in the very active arc zone and the edge of the active continent. The tectonic activity that is currently taking place is characterized by the tectonic earthquake that attacks to countryside areas, resulting from the active fault-faults found in the hills around the area. One of the mitigation efforts is microtremor measurement using HVSR (Horizontal to Vertical Spectral Ratio) method to find out the dominant frequency for determination of the magnitude of the earthquake. The predominant frequency value will determine the Shear wave velocity up to 30 meters (Vs30) which are further used for the PGA and amplification values. The result of data analysis shows that the dominant period value is in the range 0.1-0.97 second, PGA value between 92.87-142.84 gal and the amplification value is 0.99-4.38 and 2.12-9.43 times. The conclusion, the area is categorized as earthquake-prone, especially in the southeast region.Keywords: Amplification, Microtremor, Dominant Period, PGA
Collaboration network of the authors
26 authors · 50 co-authorship links
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| Co-author | Organisation | Joint articles |
|---|---|---|
| Muh. Altin Massinai | Affiliation unknown | 2 |
| Fitriani Fitriani | Affiliation unknown | 2 |
| Marjiyono Marjiyono | Affiliation unknown | 2 |
| Johannes Gedo Sea | Affiliation unknown | 1 |
| Yusuf Surachman Djajadihardja | Affiliation unknown | 1 |
| Nur Hidayat Nurdin | Affiliation unknown | 1 |
| Syamsuddin Syamsuddin | Affiliation unknown | 1 |
| A. Hardianti Yunus | Affiliation unknown | 1 |
| Muhammad Zulfitrah | Affiliation unknown | 1 |
| Syamsuddin Syamsuddin | Affiliation unknown | 1 |
| Jamaluddin Jamaluddin | Affiliation unknown | 1 |
| Wahyuni Wahyuni | Affiliation unknown | 1 |
| La Ode Armin | Affiliation unknown | 1 |
| Bambang harimei Suprapto | Affiliation unknown | 1 |
| Samsu Arif | Affiliation unknown | 1 |
| Iswar Edis Pratama | Affiliation unknown | 1 |
| Indra Jaya Muhtar | Affiliation unknown | 1 |
| Syamsuddin Syamsuddin | Affiliation unknown | 1 |
| Syamsuddin Syamsuddin | Affiliation unknown | 1 |
| Titien Haryani | Affiliation unknown | 1 |
| Riyadi Riyadi | Affiliation unknown | 1 |
| Marniati Ramli | Affiliation unknown | 1 |
Affiliations come from OpenAlex; journal OAI-PMH metadata carries none. Authors without an OpenAlex ID are matched by name, which can merge or split people.