Abstract
On the basis of the velocity field results of horizontal crustal movement obtained from GPS measurements during the periods of 1993–1999, 1999–2001 and 2001–2003 in the northeastern margin of Qinghai-**zang block, and by the inversion of negative dislocation model for the elastic block boundaries, we provide in this paper a qualitative analysis and quantitative description for the difference of motion and deformation between the tectonic blocks and their boundary faults, time-space distribution of tectonic strain field, and locations with highly accumulated strain energy and correlative intensity. Furthermore, taking the regional tectonics and block strain into full consideration, we investigate the common features of background precursors relating to location prediction for M>-6 earthquakes.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
GU Guo-hua. 1990. Datum definition in geodynamic network and inversion of deformation models [J]. Crustal Deformation and Earthquake, 10(1): 21–29 (in Chinese).
GUO Shun-min and JIANG Zai-sen. 2000. Division and motion status of blocks for the northeastern Tibetan Plateau in late Quaternary [J]. Seismology and Geology, 22(3): 219–231 (in Chinese).
HE Yu-mei and YAO Zhen-xing. 2002. Dislocation model for current crustal deformation in and around southern Taiwan, China [J]. Chinese J Geophys, 45(5): 638–645 (in Chinese).
JIANG Zai-sen, ZHANG **, CUI Du-xin et al. 2001. Recent horizontal movement and deformation in the northeast margin of Qinghai-Tibet block [J]. Chinese J Geophys, 44(5): 636–644 (in Chinese).
LI Yan-xing, HUANG Cheng, HU **n-kang et al. 2001. The rigid and elastic-plastic model of the blocks in intra-plate and strain status of principal blocks in the continent of China [J]. Acta Seismologica Sinica, 14(6): 603–610.
Matsu’ura M, Jackson D D and Cheng A. 1986. Dislocation model for aseismic crustal deformation at Hollister, California [J]. J Geophy Res, 91(B12): 12661–12674.
Okada Y. 1985. Surface deformation due to shear and tensile faults in a half-space [J]. Bulletin of the Seismological Society of America, 75(4): 1 135–1 154.
WU Ji-cang and CHEN Yong-qi. 2000. A mechanical model for fault movement of plate boundary [J]. Crustal Deformation and Earthquake, 20(2): 8–14 (in Chinese).
WU Ji-cang and XU Cai-jun. 2002. Negative dislocation model parameters inverted from GPS data in North China [J]. Geomatics and Information Science of Wuhan University, 27(4): 352–357 (in Chinese).
WU Yun, SHEN Chong-yang, QIAO Xue-jun et al. 2002. Present-day crustal movement and earthquake precursors [J]. Journal of Geodesy and Geodynamics, 22(1): 22–28 (in Chinese).
ZHANG Pei-zhen, DENG Qi-dong, ZHANG Guo-min et al. 2002. Active crustal blocks and strong earthquakes [J]. Science in China, 32(Supp): 5–11 (in Chinese).
ZHANG **, JIANG Zai-sen, WANG Qi et al. 2003. Aseismic negative dislocation model and deformation analysis of crustal horizontal movement during 1999–2001 in the northeast margin of Qinghai-**zang block [J]. Acta Seismologica Sinica, 16(4): 395–403.
ZHANG **, JIANG Zai-sen, WANG Qi et al. 2004a. Tectonic deformation features of the northern Tibetan plateau and their relationship to strong earthquakes [J]. Progress in Geophysics, 19(2): 363–371 (in Chinese).
ZHANG **, WANG Shuang-xu, CUI Du-xin et al. 2005. Regional tectonic background and medium- and short-term precursors to the Minle-Shandan earthquakes [J]. Earthquake Research in China, 19(1): 12–21.
ZHANG **, ZHANG Si-xin, WANG Shuang-xu. 2004b. Negative dislocation model for vertical crustal movement before and after Kunlun M S=8.1 earthquake [J]. Earthquake Research, 27(2): 153–158 (in Chinese).
ZHANG **ao-liang, JIANG Zai-sen, WANG Shuang-xu et al. 2003. Recent characteristics of time-space movement and deformation in the northeastern margin of Qinghai-**zang block and nearby [J]. Earthquake Research in China, 19(4): 377–385 (in Chinese).
ZHANG **ao-liang, JIANG Zai-sen, WANG Shuang-xu et al. 2004. Recent horizontal movement and seismogenic features of northeastern margin of Qinghai-**zang block [J]. Journal of Geodesy and Geodynamics, 24(4): 76–81 (in Chinese).
Author information
Authors and Affiliations
Additional information
Foundation item: Joint Seismological Science Foundation (603001) and Project of China Earthquake Administration during the tenth five-year (100501-04).
About this article
Cite this article
Zhang, X., Jiang, Zs., Wang, Q. et al. Inversion for negative dislocation on elastic block boundaries in the northeastern margin of Qinghai-**zang block and prediction for strong earthquake location. Acta Seimol. Sin. 18, 666–677 (2005). https://doi.org/10.1007/s11589-005-0094-9
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s11589-005-0094-9
Key words
- elastic block boundary
- negative dislocation model
- horizontal crustal movement
- inversion
- study of earthquake examples