GPS应变率场计算方法研究进展

Abstract

Abstract: Quantitative results of crustal movement and strain accumulation based on geodetic data have always been an important technical approach for medium and long term earthquake prediction. In view of the accurate description of seismic deformation process, scholars at home and abroad have developed a variety of strain rate field calculation methods based on GPS data. Firstly, the basic principle of GPS strain rate calculation is briefly analyzed, and then the advantages and disadvantages of various calculation methods are systematically combed. The results show that the mathematical method of strain rate calculation only considers geometric relations, and the integral method is mainly suitable for obtaining regional crustal deformation distribution under the condition of adequate data density and distribution. Local methods are mainly suitable for describing the deformation characteristics of tectonic blocks with sparse data; the physical methods of strain rate calculation take into account both geometric and physical relations, and the dislocation method is mainly suitable for the case where the main fault exists in the study area (the deformation is controlled by few faults). Numerical simulation method (such as finite element method) is mainly applicable to the case of more complete regional geological and geophysical data.

Key words: Strain rate field, GPS

CLC Number:

P315.7

WANG Jing. Calculation Method of Strain Rate Field Based on GPS Observation[J]. EARTHQUAKE, 2019, 39(2): 122-134.

References

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Calculation Method of Strain Rate Field Based on GPS Observation

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