| 印尼地区地震断层面上的海潮负荷应力特征 |
| |
| 引用本文： | 阎春恒,吴小平,许亚吉,付虹.印尼地区地震断层面上的海潮负荷应力特征[J].地震学报,2010,32(4):412-422. |
| |
| 作者姓名： | 阎春恒 吴小平 许亚吉 付虹 |
| |
| 作者单位： | 1）中国昆明650091云南大学资源环境与地球科学学院地球物理系
2）中国昆明650224云南省地震局 |
| |
| 摘 要： | 对印尼地区3574次M≥5.0地震震源断层面上的海潮负荷应力进行计算,研究了地震断层上的负荷应力随深度变化以及随断层倾角和走向的变化特征.结果表明,地震断层上的负荷正应力大于负荷切应力.逆断层上的负荷应力最大,其它依次为斜滑断层、正断层和走滑断层.倾角范围在0°—50°的断层上的负荷正应力随倾角增大有减小趋势,负荷切应力在30°—50°倾角范围的断层上较大.负荷应力随断层走向的趋势性变化不明显.不同类型断层上的负荷正应力和切应力在震源深度15km处均达到最大,之后随深度增加而减小.当震源深度小于40km时,断层面上的海潮负荷应力的量级与固体潮应力相当.因此指出,在潮汐应力对地震影响的研究中,对震源深度小于40km的海洋和沿海地震,除固体潮汐应力外还需要考虑海潮负荷应力的影响.
|
| 关 键 词： | 海潮负荷应力 地震断层 印尼地区 |
Characteristics of ocean tide loading stresses on earthquake faults in Indonesia region |
| |
| Yan Chunheng,Wu Xiaoping,Xu Yaji,Fu Hong.Characteristics of ocean tide loading stresses on earthquake faults in Indonesia region[J].Acta Seismologica Sinica,2010,32(4):412-422. |
| |
| Authors: | Yan Chunheng Wu Xiaoping Xu Yaji Fu Hong |
| |
| Affiliation: | 1) School of Resource, Environment and Earth Sciences, Yunnan University, Kunming 650091, China2) Earthquake Administration of Yunnan Province, Kunming 650224, China |
| |
| Abstract: | Abstract: Ocean loading tidal stresses on the fault of 3574KG-*8] earthquakes with Mge;5.0 in Indonesia region are calculated. The variation of ocean loading tidal stresses with depth, fault dip and fault strike are investigated. The result shows that the loading normal stresses are larger than loading shear stresses on earthquake faults. The ocean loading tidal stress on thrust fault is the largest, and the others are orderly on oblique, normal, and strike slip faults. Loading normal stresses on faults with dip of 0deg;mdash;50deg;have decreasing tendency with increase of dip, while loading shear stresses on faults with dip of 30deg;mdash;50deg;are relatively large. There is no obvious tendency of change of loading stresses with fault strike. Ocean loading tidal stresses, both normal and shear, on different seismic faults all reach the largest values at depth of 15 km, and then decrease with increasing depth. When focal depth is less than 40 km, the order of magnitude of ocean loading tidal stress on faults is equivalent to that of solid tidal stress. Therefore, in studying tidal effect on the earthquakes with depthle;40 km in ocean area, it is necessary to consider the influence of ocean loading tidal stresses, besides the solid tidal stresses. |
| |
| Keywords: | ocean loading tidal stress earthquake fault Indonesia region |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《地震学报》浏览原始摘要信息 |
|
点击此处可从《地震学报》下载全文 |
|
