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地震 ›› 2011, Vol. 31 ›› Issue (3): 64-76.

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2010年玉树7.1级地震趋势预测研究回顾

李纲, 刘杰, 王博, 郭铁栓, 张永仙, 周龙泉   

  1. 中国地震台网中心, 北京 100045
  • 收稿日期:2010-07-22 修回日期:2011-04-15 发布日期:2021-09-09
  • 作者简介:李纲(1974-), 男, 吉林省吉林市人, 副研究员, 主要从事地震综合方法预测和数字地震学等方面研究。
  • 基金资助:
    地震行业专项经费项目(200708038)

Retrospection on the Conclusions from Earthquake Tendency Forecasts before the 2010 Yushu M7.1 Earthquake

LI Gang, LIU Jie, WANG Bo, GUO Tie-shuan, ZHANG Yong-xian, ZHOU Long-quan1   

  1. China Earthquake Networks Center, Beijing 100045, China
  • Received:2010-07-22 Revised:2011-04-15 Published:2021-09-09

摘要: 本文整理了自2008年5月12日汶川8.0级地震至2010年4月14日玉树7.1级地震前, 年度地震趋势预测和日常会商中提出的地震活动和前兆异常及其分析意见。 结果表明, 玉树7.1级地震前存在一些较为明确的有关地震活动水平和危险区域判定的预测依据, 但由于玉树地区地震监测能力较弱, 缺乏较为可靠的中短期前兆异常, 因此未将该区划定为年度地震重点危险区, 仅在我国大陆地震形势预测和强震主体活动地区估计上有所涉及。 2010年青藏块体中东部地区强震危险性增强, 但由于玉树地区震前地震活动性异常以平静为主, 地震前兆数量也较少, 因此未能在玉树7.1级地震前形成短临预测意见。

关键词: 玉树地震, 年度地震趋势, 强震危险区域, 前兆异常

Abstract: In the paper, we collected and analyzed seismicity and precursor anomalies and their analysis results on yearly earthquake tendency forecast and weekly/monthly consultations between Wenchuan M8.0 earthquake on May 12, 2008 and Yushu M7.1 earthquake on April 14, 2010. The results show that there were some explicit phenomena before the Yushu M7.1 earthquake, which forecasted the earthquake tendency and important seismic risk area in China mainland. But Yushu is in an area of poor monitoring capability, lacking the credible moderate-short term precursory anomalies, therefore the area was not judged to be the annual key regions with a certain seismic risk, only mentioned in the earthquake tendency and important seismic risk area in China mainland. The strong-earthquake risk in the middle and east parts of the Tibet block was enhanced in 2010. But seismicity anomalies in the Yushu area were mainly the quietude anomalies, and precursory anomalies were few. Therefore short term prediction for the Yushu M7.1 earthquake could not be made.

Key words: Yushu earthquake, Yearly earthquake tendency, Important seismic risk area, Precursory anomaly

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