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利用俄罗斯堪察加地区1995～2005年的 GPS 观洲数据,研究了该区现今地壳水平运动速度场特征.在球坐标系中解算了各应变率分量,分析了应变率场的空间分布特征.并与地震学和地质学研究结果进行了综合对比分析.结果表明.堪察加半岛北部的微板块边界并不明显.堪察加南部测站运动速度大于中部和北部地区.愈靠近东部板块汇聚区,测站速度越大.从东海岸到西海岸,测站水平速度存在明显的梯度衰减特征,水平运动方向与太平洋板块向西北的俯冲方向基本一致.各应变率分量具有东部海岸大于中部和西海岸、从东至西呈梯度衰减的特点.堪察加大部分地区处于 EW 和 NS 向压缩状念.局部存在拉张.面应变率结果显示绝大部分为压缩区;刚性转动结果表明大部分地区表现为顺时针转动,北部地区和南端顺时针旋转性明显.东部有效应变率明显大于西部地区,东西向梯度衰减关系明显.主压应变率明显大于主张应变率.特别是在东海岸地区.主压应变率方向与中等以上地震的主压应力轴在水平方向的投影方向基本一致.地壳变形场在空间分布上的不一致性主要与太平洋板块在堪察加半岛东南侧的俯冲深度、俯冲方位角、俯冲倾角和俯冲带的耦合强度有关.
Based on GPS observation data from 1995 to 2005 in the Kamchatka region of Russia, the horizontal velocity characteristics of crustal movement in this area are studied.The strain rate components are solved in the spherical coordinate system, and the spatial distribution of strain rate field is analyzed .A comprehensive comparative analysis of the results of seismology and geology has been carried out.The results show that the microplate boundaries in the northern Kamchatka Peninsula are not obvious.The velocity of the southern station in Kamchatka is greater than that of the central and northern regions.The closer to the eastern plate There are obvious gradient attenuation characteristics of the horizontal velocity of the station from the east coast to the west coast, and the direction of horizontal movement is basically the same as that of the subduction of the Pacific plate to the northwest.Each of the strain rate components have the features that the east coast is greater than the middle and West Coast, from east to west gradient was attenuated characteristics of most parts of Kamchatka in EW and NS to compress the concept of tension exists locally, the surface strain rate results show that most of the compression zone; rigid rotation results show that the majority of The area shows a clockwise rotation with obvious clockwise rotation in the northern part and the southern part.The effective strain rate in the eastern part is obviously larger than that in the western part and the east-west gradient The relationship between the principal compressive strain rate and the principal compressive stress axis of medium-sized earthquakes is basically the same in the horizontal direction. The crustal deformation field is in the spatial distribution The inconsistencies are mainly related to the subduction depth, subduction azimuth, subduction dip and coupling intensity of the Pacific plate on the southeastern Kamchatka Peninsula.