Near-field surface deformation during the April 20, 2013, Ms7. 0 Lushan earthquake measured by 1-Hz GNSS
Near-field surface deformation during the April 20, 2013, Ms7. 0 Lushan earthquake measured by 1-Hz GNSS
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DOI：
10.3724/sp.j.1246.2013.02001
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发表时间：
2013-05
影响因子：
2.4
通讯作者：
Liu Gang;Zhao Bin;Z. Rui;Huang Yong;W. Jun;Nie Zhaosheng;Qiao Xuejun;Tan Kai
中科院分区：
文献类型：
--
作者：
Liu Gang;Zhao Bin;Z. Rui;Huang Yong;W. Jun;Nie Zhaosheng;Qiao Xuejun;Tan Kai
摘要：2013年4月20日，M s7。中国地壳运动观测网络（CMONC）拥有的近距离连续全球定位系统（CGPS）站成功记录了芦山0级地震。来自距震源 30 公里至 200 公里的 8 个 CGPS 站的 1 Hz GNSS 数据进行了准实时处理。近场表面变形表现出以下特点：近场运动仅限于几厘米；变形波峰值明显大于静态永久偏移；事件初期，断层北壁向东南方向移动，南壁向西南方向移动； SCTQ 站距离震源最近，距震源 30 km，最大静态永久位移为 2 cm；形变波峰值分别为东、南、垂直向上1. 5 cm、5 cm、3 cm；变形产生的速度和加速度的峰值分别为3. 4 cm/s 和5. 3 cm/s 2 。
Abstract: The April 20, 2013, M s7. 0 Lushan earthquake was successfully recorded by closely spaced Continuous Global Positioning System (CGPS) stations owned by the Crustal Movement Observation Network of China (CMONC). The 1-Hz GNSS data from eight CGPS stations, which are located between 30 km and 200 km from the hypocenter, were processed within quasi-real-time. The near-field surface deformation indicated the following characteristics: the near-field movements were limited to several centimeters; the peak of the deformation wave was significantly larger than the static permanent offset; at the beginning of the event, the north wall of the fault moved to the southeast as the south wall moved to the southwest; station SCTQ, which was the closest station to the hypocenter at 30 km, had the largest static permanent displacement of 2 cm; the peaks of the deformation waves were 1. 5 cm, 5 cm and 3 cm, to the east, the south and vertically upward, respectively ; and the peaks of velocity and acceleration, derived from the deformation, were 3. 4 cm/s and 5. 3 cm/s 2 , respectively.