ACADSTAFF UGM
| Title | : | Magnitude Detection Threshold Map in MuaraLaboh Geothermal Field's Seismic Network Plan and Development |
| Author | : |
Theodosius Marwan Irnaka, S.Si., M.Sc., Dr. (1) Dr.rer.nat. Wiwit Suryanto, S.Si., M.Si. (2) |
| Date | : | 2013 |
| Keyword | : | magnitude,threshold,geothermal,seismic,network,velocity,modeling magnitude,threshold,geothermal,seismic,network,velocity,modeling |
| Abstract | : | Fifteen seismometers have been set in MuaraLaboh geothermal field in order to monitor seismic activities. MuaraLaboh is in the South Solok Regency, 150 km south east of Padang, the capital city of West Sumatera Province, Indonesia. In geothermal system, we need to enhance water flow in a hot rock by injecting pressurized cold water to increase the permeability, and enhances the flow of water within the reservoir. The injection process will naturally cause fractures to be occurred. The opening of fracture usually can be detected at the surface by seismometer as micro-earthquake. Furthermore, a small fracture which is only detected by two or less seismic stations is not sufficient to obtain good hypocenter location. Therefore, an evaluation of geothermal seismic network design is very important aspect in order to optimize the detection threshold of micro-earthquake signal. In this paper, determination of magnitude threshold detection utilized MuaraLaboh geothermal field's seismic network using fifteen short period seismometers. A local velocity model was used to simulate micro-earthquake signals. Ambient noise sample from every station was also taken into account to simulate the most realistic micro-earthquake model. The final result is magnitude detection threshold map for selected moment magnitude which will depict sensitivity of MuaraLaboh geothermal field's seismic network towards certain micro-earthquake magnitude and distance. Note : complete author lists : Siti Fatimah, Theodosius M. Irnaka, Donata N.W. Wardani, Wiwit Suryanto, Julfi Hadi |
| Group of Knowledge | : | Geofisika |
| Level | : | Internasional |
| Status | : |
Published
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