Surface displacement of the March 26, 1997 Kagoshima‐Ken‐Hokuseibu Earthquake in Japan from synthetic aperture radar interferometry
Surface displacement of the March 26, 1997 Kagoshima‐Ken‐Hokuseibu Earthquake in Japan from synthetic aperture radar interferometry
复制标题
合成孔径雷达干涉测量 1997 年 3 月 26 日日本鹿儿岛县北西武地震的地表位移
DOI：
10.1029/1998gl900191
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发表时间：
1998
影响因子：
5.2
通讯作者：
C. Werner
中科院分区：
文献类型：
--
作者：
S. Fujiwara;H. Yarai;S. Ozawa;M. Tobita;M. Murakami;H. Nakagawa;Koh Nitta;P. Rosen;C. Werner
1997年3月26日日本西南部鹿儿岛-鹿儿岛-鹿儿井6.1级地震的JERS-1差分L波段合成孔径雷达干涉图显示，在雷达视线(LOS)方向上，同震峰面位移约9厘米。一个永久的GPS阵列探测到了这次地震产生的1到2厘米的水平位移。通过对SAR和GPS数据的联合反演，我们在没有任何地震学数据的情况下估计了一种断裂机制。从地震运动的单断层模型得到的理论雷达视距位移模式与合成孔径雷达和全球定位系统观测结果非常吻合。该模型假定在11公里(宽)×12公里(长)的矩形断层面上左旋滑动0.46 cm，前倾角为19°。我们证明了L波段合成孔径雷达干涉测量可以详细描述几厘米的地表位移，并建立断层模型。然而，尽管这些采集是在寒冷的季节进行的，但在干涉图中有明显的水汽信号，相当于路径延迟高达1.5厘米。
A JERS 1 differential L‐band synthetic aperture radar (SAR) interferogram of the March 26,1997 Kagoshima‐ken‐hokuseibu earthquake (Mw=6.1) in southwestern Japan shows about 9 cm peak‐to‐peak coseismic surface displacement in the radar line‐of‐sight (LOS) direction. A permanent GPS array detected 1 to 2 cm horizontal displacements from this earthquake. By inverting the SAR and GPS data together, we estimated a fault mechanism without any seismological data. A theoretical radar LOS displacement pattern from a single fault model of the earthquake motion matches the SAR and GPS observations closely. The model assumes left lateral slip of 0.46 cm with rake angle of 19° on a rectangular fault plane of dimensions 11 km (width) by 12 km (length). We demonstrate that L‐band SAR interferometry can describe several cm surface displacement in detail and construct a fault model. However, despite the acquisitions being during the cold season, there are apparent water vapor signatures in the interferogram with equivalent path delays of up to 1.5 cm.
影响因子：
64.8
作者：
MASSONNET, D;ROSSI, M;RABAUTE, T
通讯作者：
RABAUTE, T