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最小完整性震级对新疆及其邻区某些地震区震情分析的影响
  • ISSN号:1004-2903
  • 期刊名称:地球物理学进展
  • 时间:2014.12.15
  • 页码:2538-2543
  • 分类:P315[天文地球—地震学;天文地球—固体地球物理学;天文地球—地球物理学]
  • 作者机构:[1]中国科学院地质与地球物理研究所中国科学院页岩气与地质工程重点实验室,北京100029
  • 相关基金:国家自然科学基金委重点项目(41030750)资助
  • 相关项目:斜坡失稳的广义临界位移准则与预测方法
中文摘要:

地震目录的完整性对CBS(Cumulative Benioff Strain)值计算结果影响较大,直接影响对特定地震区强震发生时间窗口的判断.对某些地震区数据分析时若考虑最小完整性震级Mc,则可大大降低预测临界CBS值和实际值之间的误差.为此,本文考虑Mc,对新疆及其邻区某些地震区未来震情进行重新研判,结果表明:Mc对拜城与库尔勒地震区的临界值和监测值影响不大,而对中吉边境、新源-阿拉木图、昆仑山口西和若羌地震区的临界值和监测值则有较大影响.目前拜城、库尔勒和若羌三个地震区均距临界状态较远,故预测发震时间窗口为中长期.中吉边境地震区和新源-阿拉木图地震区未来分别将有大震和巨震发生,按近期地震活动性判断,预测发震时间窗口为中长期.昆仑山口西地震区未来将发生强震,目前已接近临界状态,预测发震时间窗口为中短期.本文研究结果可供有关部门参考.

英文摘要:

The integrity of earthquake catalogue has a significant influence on calculation of the critical CBS(Cumulative Benioff Strain)value,which further directly influences the judgment of the predictive time window of strong earthquake occurrence for a specific seismic zone.It was noted that when considering the minimum magnitude of completeness(Mc),the error between the critical values and actual monitored ones of CBS could be greatly reduced for some seismic zones.In view of this,the present study reanalyzed the earthquake situation for some seismic zones in the Xinjiang region and its adjacent regions.The results indicate that whether considering Mcor not,it has no obvious impact on the prediction results of the Baicheng and Kuerle seismic zones.On the contrary,Mchas a significant influence on the prediction results of the China-Kyrgyzstan border seismic zone,XinyuanAlmaty seismic zone, Kunlunshankouxi seismic zone and Ruoqiang seismic zone.Considering that it is far away from the critical state,all of the predictive time windows for the Baicheng,Kuerle and Ruoqiang seismic zones are in the scale of the medium-long term.Meanwhile,it was found that a major earthquake and a great earthquake would occur in the ChinaKyrgyzstan border seismic zone and Xinyuan-Almaty seismic zone,respectively.The predictive time windows for these two zones are also in the scale of medium-long term according to the recent seismicity.Moreover,an impending strong earthquake will occur in the Kunlunshankouxi seismic zone with a scale of medium-short term. The analysis results above could be considered by the related department.

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期刊信息
  • 《地球物理学进展》
  • 北大核心期刊(2011版)
  • 主管单位:中国科学院
  • 主办单位:中国科学院地质与地球物理研究所 中国地球物理学会
  • 主编:刘光鼎
  • 地址:北京市9825信箱
  • 邮编:100029
  • 邮箱:prog@mail.igcas.ac.cn
  • 电话:010-82998113 62369620
  • 国际标准刊号:ISSN:1004-2903
  • 国内统一刊号:ISSN:11-2982/P
  • 邮发代号:
  • 获奖情况:
  • 国内外数据库收录:
  • 日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版)
  • 被引量:18579