Continuous GPS Array and Present-day Crustal Deformation of Japan
Continuous GPS Array and Present-day Crustal Deformation of Japan
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DOI：
10.1007/978-3-0348-7695-7_26
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发表时间：
2000-12
影响因子：
2
通讯作者：
T. Sagiya;S. Miyazaki;T. Tada
中科院分区：
文献类型：
--
作者：
T. Sagiya;S. Miyazaki;T. Tada
-拥有约1000个永久站点的GPS阵列正在日本运行。GPS阵列揭示了日本岛屿与大地震和持续的长期变形有关的同震变形。根据GPS站的日坐标数据，估计应变率分布。应变率大的地区大多与板块边界和活火山有关。此外，新潟—神户构造带（NKTZ）被认为是沿日本海海岸和中部和近畿地区北部应变速率较大的区域。这个新发现的构造带可能与欧亚（或阿姆里亚）板块和鄂霍次克（或北美）板块之间的假设边界有关。地壳形变的精确观测为地震和其他地壳活动的数值模拟提供了重要的边界条件。适当的连续变形场计算方法直接适用于此类数值模拟的数据同化。
—A GPS array with about 1,000 permanent stations is under operation in Japan. The GPS array revealed coseismic deformations associated with large earthquakes and ongoing secular deformation in the Japanese islands. Based on daily coordinate data of the GPS stations, strain rate distribution is estimated. Most regions with a large strain rate are related to plate boundaries and active volcanoes. In addition, the Niigata-Kobe Tectonic Zone (NKTZ) is recognized as a region of large strain rate along the Japan Sea coast and in the northern Chubu and Kinki districts. This newly found tectonic zone may be related to a hypothetical boundary between the Eurasian (or Amurian) and the Okhotsk (or North America) plates. Precise observation of crustal deformation provides important boundary conditions on numerical modeling of earthquakes and other crustal activities. Appropriate computation methods of continuous deformation field are directly applicable to data assimilation for such numerical simulations.