- 责任者：Xu Lisheng (Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China) ; Yan Chuan
- 刊名：Chinese Journal of Geophysics
- 出版年：2013
- 卷期：56(12)
- 关键词：地震定位 ; seismic location
- 页码：p.4009-4027
- 图表：9 illus., 23 tables, 17 refs.
- 分类号：0500
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
Origin times and locations of people-made earthquakes are known, so examining an earthquake-location technology using seismic recordings from the people-made earthquakes is one of the convincing ways. In order to examine the TRIT （Time Reversal Imaging Technique）, we collect seismic recordings from 10 people-made earthquakes, 5 air-guns and 5 chemical explosions. The seismogragh network for the air-guns is smaller, about 20 km across and the one for the chemical explosions is larger, about 200 km across. At first, two better velocity models were chosen out from the models available in literatures by comparing the measured values with the true ones. Then, the best one was decided further, while the final measured values for the 10 events were determined based on the two models, by comparing the measured values with the true ones, as well as the uncertainties of the measured values. The results show that, with the best velocitymodel, the epicenter biases for both the air-guns and chemical explosions are around 500 m; the depth biases of the air-guns are around 100 m while those of the chemical ones are around 200 m; the origin time biases of the chemical ones are around 0.06 s, but those of the air-guns are larger, reaching about 0.4 s, which might be explained by the lower velocity of local water region. As a conclusion, origin times and hypocenters, including even focal depths, are able to be determined at reasonable accuracy and precision by the TRIT.