帅向华, 冯蔚, 董翔, 刘钦, 甄盟, 李继赓. 震后分时段地震烈度影响场快速判识方法研究[J]. 武汉大学学报 ( 信息科学版), 2020, 45(8): 1195-1204. DOI: 10.13203/j.whugis20200120
引用本文: 帅向华, 冯蔚, 董翔, 刘钦, 甄盟, 李继赓. 震后分时段地震烈度影响场快速判识方法研究[J]. 武汉大学学报 ( 信息科学版), 2020, 45(8): 1195-1204. DOI: 10.13203/j.whugis20200120
SHUAI Xianghua, FENG Wei, DONG Xiang, LIU Qin, ZHEN Meng, LI Jigeng. Rapid Identification Method of Earthquake Intensity Influence Field in Divided-Period After Earthquake[J]. Geomatics and Information Science of Wuhan University, 2020, 45(8): 1195-1204. DOI: 10.13203/j.whugis20200120
Citation: SHUAI Xianghua, FENG Wei, DONG Xiang, LIU Qin, ZHEN Meng, LI Jigeng. Rapid Identification Method of Earthquake Intensity Influence Field in Divided-Period After Earthquake[J]. Geomatics and Information Science of Wuhan University, 2020, 45(8): 1195-1204. DOI: 10.13203/j.whugis20200120

震后分时段地震烈度影响场快速判识方法研究

Rapid Identification Method of Earthquake Intensity Influence Field in Divided-Period After Earthquake

  • 摘要: 震后快速确定地震烈度影响场是评估地震灾害损失和开展应急救援的关键。在震后获得地震三要素、获得强震仪器烈度和取得地震现场资料这3种场景下连续开展地震烈度影响场的判定与修正工作。初始获得地震三要素之后,采用适用于全国不同区域的地震烈度衰减关系进行地震烈度影响场的初步判定;获得仪器地震烈度之后,利用空间插值对初步判定的地震烈度影响场进行修正;取得地震现场调查资料之后,采用现场调查资料、仪器地震烈度与余震分布相结合的方法进行地震烈度影响场修正。从而在震后12 h内,针对破坏性大地震提供较为科学准确的地震影响场判识理论方法和实现技术。以2013年中国四川芦山7.0级地震为震例,进行了分时段的地震烈度影响场计算和修正,将计算结果与实际调查烈度进行对比分析,一致性较好。

     

    Abstract:
      Objectives  After the devastating earthquake, rapid determination of earthquake intensity influence field in post-earthquake is the key on loss estimation of earthquake disaster and emergency rescue.It is necessary to explore how to obtain the influence field with multi-source data on different periods. Accurate earthquake influence field is an important basis for emergency commands and decisions.
      Methods  We discussed on determine and correct the earthquake intensity influence field in three periods: After obtaining three elements of earthquake, acquiring strong motion instrument intensity and earthquake field investigation data. After obtaining three elements of the earthquake, the preliminary results on earthquake intensity influence field using earthquake intensity attenuation relationship of different regions in Chinese mainland.Then we modified the preliminary results on earthquake intensity influence filed using the spatial interpolation after obtained the strong motion intensity record. At last, we modified the earthquake intensity influence filed jointly using strong motion instrument intensity and field investigation data. Then we could provide a scientific and accurate theoretical method and implementation technology of earthquake influence field identification, within 12 hours after the destructive large earthquake.
      Results  Taking the 2013 Lushan M7.0 earthquake in Sichuan Province as an example, we calculate and revise the earthquake intensity influence field in divided-periods. On the first period, the earthquake influence field is generated rapidly according to the three earthquake elements and the attenuation relationship. On the second period, by using strong seismic data and interpolation method, earthquake high intensity is given accurately. On the third period, integrate multi-source data and the calculated results have a good consistency with the actual earthquake intensity.
      Conclusions  The high intensity region can be accurately interpreted by this method. At the same time, the direction of seismic intensity attenuation and the intensity of the instrument intensity can jointly constrain the trend and boundary of the low-intensity area. Furthermore, a more accurate influence field of intensity is given to provide technical support for the early earthquake emergency work.

     

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