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EARTHQUAKE ›› 2016, Vol. 36 ›› Issue (4): 89-100.

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A Review of Temporal-spatial Distribution of Precursory Deformation Anomalies before Moderate to Strong Earthquakes

LU Zhen, LI Rui-sha, TANG Hong-tao, JIA Peng, JI Ling-yun   

  1. Second Crust Monitoring and Application Center, CEA, Xi’an 710054, China
  • Received:2016-04-11 Published:2020-07-03

Abstract: Based on crustal deformation observations, we counted and analyzed space-time distribution characteristics recorded by regional deformation of geophysical field and fix-site deformation observations. The results show that the anomalies in regional deformation of geophysical field occurred early and the anomaly range is narrow, which is more suitable for estimating the long-term location of future earthquake occurrence. For the fix-site deformation observations, the occurrence of precursory anomalies are usually close to earthquakes and the anomaly locations distribute in a big range, which is suitable for short-term earthquake prediction with the location estimated by combining the regional deformation of geophysical field. This work has positive meaning on understanding the space-time distribution of precursory anomaly and improving the effectivity of earthquake prediction.

Key words: Crustal deformation observation, Precursory deformation anomaly, Earthquake prediction

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