Halida, Shabila Gadis (2019) Relokasi Hiposenter dan Koreksi Stasiun MEQ Lapangan Panas Bumi X Menggunakan Metode Coupled Velocity-Hypocenter. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Informasi dan ketepatan parameter gempa bumi yang terjadi pada lapangan panas bumi merupakan hal yang sangat penting karena memengaruhi sistem panas bumi, agar sistem panas bumi tetap bekerja, monitoring perlu dilakukan. Salah satu monitoring menggunakan data mikroseismik, yang merekam aktifitas MEQ (Micro Earth Quake) atau gempa mikro pada lapangan panas bumi. Tujuan penelitian mendapatkan persebaran parameter hiposenter relokasi, peta persebaran episenter gempa mikro, mengetahui RMS (Root Mean Square) dari hasil relokasi, serta pengaruh koreksi stasiun terhadap RMS dan model kecepatan daerah penelitian mengunakan Metode Coupled Velocity-Hypocenter pada Lapangan X. Data yang digunakan sebanyak 50 event gempa mikro. Jaringan stasiun gempa mikro mencatat data getaran tanah dengan fungsi waktu dari tiga komponen North, East dan vertikal yang digunakan dalam Metode Geiger. Data yang diproses adalah rekaman getaran gempa mikro selama 15 hari, 24 jam perekaman oleh 9 stasiun dengan magnitudo kurang dari 3 skala Richter. Relokasi hiposenter menggunakan Metode inversi Coupled Velocity-Hypocenter untuk menentukan ulang parameter hiposenter dan koreksi stasiun yang dilakukan dua kali iterasi agar informasi gempa bumi mikro menjadi lebih baik dan akurat. Hasil penelitian memperoleh persebaran hiposenter pada kedalaman 3 km, peta persebaran episenter hasil relokasi dengan episenter terkelompokkan disekitar stasiun pencatat gempa berarah barat laut-tenggara mengkuti pola patahan di daerah penelitian, serta koreksi stasiun menghasilkan 6 stasiun bernilai negatif, 2 stasiun bernilai positif dan 1 stasiun bernilai nol yang merupakan stasiun referensi, untuk nilai RMS didapat rata-rata 0.5 detik.
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Information and accuracy of earthquake parameters that occur on geothermal fields is very important because it affects geothermal systems. In order for geothermal systems continue their function., monitoring needs to be done. One of the monitoring techique is using micro seismic data, which records the activities of MEQ (Micro EarthQuake) or micro earthquakes on geothermal fields. The purpose of the study was to obtain the distribution of the hypocenter relocation parameters, the distribution map of the micro earthquake epicenter, find out the RMS (Root Mean Square) from the relocation results, and the effect of station correction on the RMS and study area velocity model using the Couple Velocity-Hypocenter Method on Field X. Data used 50 micro earthquake events. Micro earthquake station network records ground vibration data using time functions from three components North, East and vertical components, used in the Geiger Method. The processed data is a recorded vibration of micro earthquakes for 15 days, 24 hours of recording by 9 stations with magnitudes less than 3 on the Richter scale. Hypocenter relocation uses the Coupled Velocity-Hypocenter inversion method to re-determine the hypocenter and station correction parameters that are performed twice iterations so that micro earthquake information becomes better and more accurate. The results of this study is obtained hypocenter distribution at a depth of 3 km, the epicenter distribution map of the results from relocation with a grouped epicenter around the earthquake-recording station with northwest-southeast direction followed the fault pattern in the study area, and station correction produced 6 negative value stations, 2 positive value stations and 1 station worth zero, which is the reference station, for the RMS value an average of 0.5 seconds is obtained.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSGf 624.176 2 Hal r-1 2019 |
| Uncontrolled Keywords: | Coupled Velocity-Hypocenter, gempa bumi mikro, koreksi stasiun |
| Subjects: | Q Science > Q Science (General) > Q325 GMDH algorithms. Q Science > QE Geology > QE538.8 Earthquakes. Seismology |
| Divisions: | Faculty of Civil Engineering and Planning > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | Shabila Gadis Halida |
| Date Deposited: | 12 Jan 2024 02:54 |
| Last Modified: | 12 Jan 2024 02:54 |
| URI: | http://repository.its.ac.id/id/eprint/64969 |
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