| 英文摘要 |
The present work is focused to investigate geochemical variations of soil-gas composition at established geochemical observatories along the Hsincheng fault(HC) in Hsinchu area, Hsinhua fault(HH) in Tainan and at Jaosi in Ilan areas of Taiwan, respectively, to determine the influence of enhanced concentrations of soil gases to monitor the tectonic activity in the region and to test proposed tectonic setting based model from data generated at earthquake monitoring stations during observation period of year 2011. Based on the anomalous signatures from particular monitoring stations we are in a state to identify the area for impending earthquakes of magnitude ≧5. For selection criteria, earthquakes having local intensity ≧ 1 at the monitoring stations with epicentral distance(R) < 150 kms having D/R ratio ≧ 1 with focal depth < 40 kms are considered. During the observation period about 18 earthquakes of magnitude ≧5 were recorded in and around Taiwan. However, out of these, few earthquakes fitted-well under the defined selection criteria and were tested for the proposed model. |
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