基于高率(1 Hz ) 从 Longmenshan 差错的矿脉基卒下盘上的四川 GPS 连续观察网络的 GPS 数据,我们在 5.12 Wenchuan 地震期间描绘了近地的表面运动进程。结果比变丑设定的证明差错附近的最大的变丑大。差错的北片断上的车站首先向震中移动了,然后向差错的垂直取向转弯了。南部的片断上的车站的变丑更小、恢复。起始的运动根本向下车站被跟随由沿着运动周期。从高率的 GPS 和自记加速计数据比较排水量,我们能看见那他们在主要吃惊的到达以前是历久不渝的,但是尽管他们被同步,以后, 10 厘米差别被发现并且在里面阶段。更多的工作还有待于被做解释这。这是第一次实际 M 的地震的真实近地的表面运动 > 7.0 在瓷器被决定了。这些大小因此具有为表面破裂过程的研究和在这个区域的震波旅行路径的分析的高价值。
Based on high-rate (1 Hz) GPS data from the Sichuan GPS Continuous Observation Network on the footwall of the Longmenshan Fault, we have characterized the near-field surface movement process during the 5.12 Wenchuan Earthquake. Results show that the maximum deformation near the fault is larger than the deformation set. Stations on the northern segment of the fault moved towards the epicenter first, and then turned toward the vertical orientation of the fault. Deformation of stations on the southern segment is smaller and recovered. The initial motion at all of the stations was downward followed by periodic up and down movements. Comparing the displacement from high-rate GPS and accelerograph data, we can see that they are consistent prior to the arrival of the principal shock, but afterwards a 10 cm difference is found, even though they are synchronized and in phase. More work is yet to be done to explain this. This is the first time that actual the real near-field surface movements of an earthquake of M 〉7.0 have been determined in china. These measurements are therefore of high value for studies of surface rupture processes and the analysis of seismic wave travels paths in this region.