摘要
In this paper, the relationships of the plunges and azimuths of T and P axes versus the strikes, dips, and rakes of two seismic nodal planes were derived to provide ref- erence for earthquake researchers. The independence of the plunges and azimuths of T, B, and P axes in focal mech- anism solution was discussed, and it was concluded that three parameters, i.e., the azimuths of T, B and P axes, are completely independent. The focal mechanism solution representation based on Euler rotation was introduced, using three Euler angles in place of the plunges and azi- muths of T, B, and P axes, and three focal mechanism solution representations were briefly compared and ana- lyzed in respect of accuracy on the basis of the assumption of rounding; it was concluded that the Euler angle repre- sentation has better accuracy, compared with the azimuth representation and the traditional representation with T, B, and P axes.
In this paper, the relationships of the plunges and azimuths of T and P axes versus the strikes, dips, and rakes of two seismic nodal planes were derived to provide ref- erence for earthquake researchers. The independence of the plunges and azimuths of T, B, and P axes in focal mech- anism solution was discussed, and it was concluded that three parameters, i.e., the azimuths of T, B and P axes, are completely independent. The focal mechanism solution representation based on Euler rotation was introduced, using three Euler angles in place of the plunges and azi- muths of T, B, and P axes, and three focal mechanism solution representations were briefly compared and ana- lyzed in respect of accuracy on the basis of the assumption of rounding; it was concluded that the Euler angle repre- sentation has better accuracy, compared with the azimuth representation and the traditional representation with T, B, and P axes.
基金
supported by Special Foundation for Seismic Research (Grant No.201208006)
Director Foundation of Institute of Seismology,China Earthquake Adminstration (Grant Nos.IS201116013,IS201506220)
National Natural Science Foundation of China (Grant Nos.40974012,41304019)
