| Title | Temporal Analysis of Visible-Thermal Infrared Band and Magnetotelluric Method to Simulate a Geothermal Sitting at Mt. Ciremai, West Java, Indonesia |
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| Authors | Prihadi Sumintadireja, Asep Saepuloh, Diky Irawan, Lucky Junursyah |
| Year | 2011 |
| Conference | Stanford Geothermal Workshop |
| Keywords | Landsat ETM+, LST, Mt. Ciremai, Magneto Telluric, surface manifestation |
| Abstract | Detecting thermal anomaly at surface is crucial for geothermal exploration. Since field observations to map surface manifestation are costly and only limited to certain area, we adopted a temporal analysis of visible to thermal infrared band of Landsat enhanced thematic mapper (ETM+) data. Four scenes data with different acquisition date, but same path and row were used in this study. The purpose of this study is to detect surface manifestation by selecting Mt. Ciremai in West Java, Indonesia. An atmospheric correction is applied to the Landsat ETM+ data to remove the effect of water vapor in the atmosphere. Then, a temporal analysis of NDVI with threshold and Land Surface Temperature (LST) were used to estimate spatially the distribution of surface manifestation. A field temperature measurement at seven locations was used as comparison to the LST. The six zones of thermal anomalous could be extracted by combining the LST with NDVI threshold. Three zones supposed to be related with geothermal system and the others related to human activities. In addition to thermal anomaly detection at surface, a Magnetotelluric (MT) survey was performed at eastern flank of the volcano with the purpose to estimate subsurface structure. Finally, we could find the three suitable zones which has potential for a geothermal sitting at the eastern flanks |