Abstract
By analyzing the digital tilt tidal observations at Yongsheng station and strain tidal observations at Houma station, this paper suggests that the solid tidal force might trigger tiny abrupt deformation when the seismogenic system enters into an instable critical state. The step and abrupt changes correlate to a certain extent to the direction of tidal force and the orientation and size of tidal shear stress along the fault strike. In the paper, we study for the first time the relationship between deformation anomaly and additional tidal stress in order to approach the physical mechanism of anomalies appeared immediately before earthquakes and the distinguishing method.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
CHEN Rong-hua. 2003. Relation before tidal force triggering of significant shocks and the large earthquake and its application in the prediction of Yajiang earthquake [J]. Earthquake, 23(1): 53–56 (in Chinese).
Heaton T H. 1975. Tidal triggering of earthquakes [J]. Geophys J R astr Soc, 43(307): 307–326.
LI Kai-wu. 2000. Earth rotation and triggering of tidal-generating force for the strong earthquakes in North China [J]. Earthquake, 20(1): 59–65 (in Chinese).
LI Yan-xing, XU Li-sheng, HU **n-kang. 2001. Relation between the horizontal tide force which the sun and moon imposes on the seismogenic zone and the forcal mechanism [J]. Earthquake, 21(1): 2–6 (in Chinese).
MA **, MA Sheng-li, LIU Li-qiang. 1995. The stages of anomalies before an earthquake and the characteristics of their spatial distribution [J]. Seismology and Geology, 17(4): 363–371 (in Chinese).
XI Qin-wen and HOU Tian-hang. 1986. Earth tides and generating tide constants [J]. Earthquake Research in China, 2(2): 30–41 (in Chinese).
XI Qin-wen, YANG Lin-zhang, LI Kai-wu. 1994. Earth’s response to tidal generating force and its synthetic analysis [J]. Earthquake Research in China, 10(supp.): 83–89 (in Chinese).
YU Wei-xian, ZHANG Jian-guo, ZHOU Guang-quan. 2005. Surface Rupture of the 2001 Yongsheng M=6 earthquake and Chenghai fault [J]. Journal of Seismological Research, 28(2): 125–128 (in Chinese).
ZHOU Guang-quan, WANG **-nan WANG Shao-**. 2002. The seismological tectonic background and seismogenic structure of the M=6.0 Yongsheng earthquake [J]. Journal of Seismological Research, 25(4): 356–361 (in Chinese).
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: Joint Seismological Science Foundation of China (106013).
About this article
Cite this article
Zhang, J., Chen, Rh., Yang, Lz. et al. Research on distinguishing method and mechanism of tidal deformation anomalies before large earthquakes. Acta Seimol. Sin. 19, 155–162 (2006). https://doi.org/10.1007/s11589-002-0155-2
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s11589-002-0155-2