Strain accumulation in South Korea inferred from GPS measurements
Strain accumulation in South Korea inferred from GPS measurements
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DOI：
10.1186/bf03351950
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发表时间：
2006-01-01
影响因子：
3
通讯作者：
Park, Pil-Ho
中科院分区：
文献类型：
--
作者：
Jin, Shuanggen;Park, Pil-Ho
监测地壳应变变化是了解地壳构造活动物理过程的关键问题。本文利用2000年3月至2004年2月的GPS观测资料，定量研究了韩国半岛的板块形变模式和分布。结果表明，韩国地区存在两种异常的应变积累速率，即东西部的地壳应变具有东西向的挤压积累速率，而中部沿着东经127.5度的地壳应变具有南北向的拉伸积累速率。此外，GPS导出的地震矩累积率是显着的，并与韩国最近的历史地震和断层带相一致。韩国中部（约127.3 ° E，35.5 ° N）、北部边缘（约128.0 ° E，38.0 ° N）和东北部（约128.5 ° E，37.3 ° N）的地震矩率异常最大，地震危险性较高。
Monitoring the variation of the crustal strain is a key issue to understand the physical process of crustal tectonic activities. In this paper, GPS data for the period from March 2000 to February 2004 were analyzed to quantitatively investigate the plate deformation patterns and distributions in the South Korean peninsula. The results show two anomalous rates of strain accumulation in South Korea, a W-E compression accumulation of crustal strain in the East and West parts, and a N-S extension strain accumulation in the middle part along the longitude of about 127.5 degrees E. In addition, the GPS-derived seismic moment accumulation rate is significant and consistent with recent historic earthquakes and fault zones in South Korea. The most anomalous seismic moment rates are in the middle part (about 127.3 degrees E, 35.5 degrees N), North edge (about 128.0 degrees E, 38.0 degrees N) and Northeast part (about 128.5 degrees E, 37.3 degrees N) of South Korea, indicating a high earthquake risk.