The seismological observation system in China achieved a rapid development during the Tenth FiveYear Plan period. The construction of the technical system of Data Backup Center for China Seismograph Network was one of the most important parts of China Digital Seismological Observation Network program, and was completed by the Institute of Geophysics, China Earthquake Administration at the end of 2007. The data center is capable of receiving and storing near real‐time continuous waveform data from more than 1000 permanent stations, and also manipulating the data, including data quality control, data format conversion, event data extraction by user order, and data download service via internet. By now we have supplied about 70 TB waveform data to over 70 research projects in more than 10 academic institutions; especially after the Wenchuan great earthquake our prompt data service played an important supporting role for relevant researches. This paper presents the technical system construction of the Data Backup Center, prompt data service for Wenchuan earthquake studies, establishment of the near real‐time automatic event‐extraction system for large earthquakes, and data service for seismological and related researches.
Making use of recent GPS data, heat flow data, elevation data, tectonic stress data, REVEL model of global plate movement, a thin-shell finite element model incorporating known active faults is adopted to study the recent tectonic activity of Tibetan Plateau. A set of computational experiments show that: The existence of the active strike-slip faults is one of the major controlling factors on the eastern and southeasternward movement of the Tibetan crust material. The best numerical simulation result of the movement style of Sichuan-Yunnan tectonic block is obtained from the models with strength difference among tectonic blocks. The best models suggest that the topographic stress and the convergence forces of the adjacent plate are controlling factors of the active faults in Tibetan Plateau, and the drag force under the lithosphere caused by the convection of the asthenosphere material also plays an important role as the boundary condition of the model.
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