中国东北地区深震定位方法及适应性研究

发布时间：2018-05-16 03:02

本文选题：中国东北 + 深震定位　；参考：《吉林大学》2017年硕士论文

【摘要】：黑龙江省处于欧亚板块东北部的弧区,有时会有深度达到300-600公里的深源地震发生,而且地震释放的能量即地震的震级较大,有感范围也很大。这些深源地震,处于黑龙江省测震台网的监测范围之内,如何开展好这些深源地震的定位工作,快速准确地测定深震震源参数,选定最优方法对深源地震进行定位,已成为一个迫切需要解决的问题。本文的研究结果在一定程度上有助于研究东北地区的地球动力学特征,同时为东北地区的防震减灾工作提供一定帮助。黑龙江省测震台网经过“十五”项目的改造建设之后,日常监测使用的定位方法主要是JOPENS系统中的MSDP人机交互软件自带的地震定位程序,较为常用的软件自带定位计算方法有单纯型法、自适应法、HYP2000、Hypo SAT、LOCSAT等,因为其中的单纯型法、自适应法、HYP2000方法对于这种震中距小于1000KM的深源地震,深度计算不准确,因此,较为适用于该地区深源地震的定位方法只有LOCSAT和Hypo SAT方法。只有确定了目前正在使用的这两种定位方法中,哪一种更加适用于黑龙江台网记录到的深震的处理,才能够切实提高黑龙江省测震台网深源地震的定位质量及定位速度。本文针对2008年1月至2016年12月,41°—46°N,128°—137°E,黑龙江穆棱—吉林汪清一带深源地震事件波形数据,分别采用MSDP人机交互软件中适用于深震定位的LOCSAT和Hypo SAT定位方法对这些地震进行重新定位,将测定的深源地震震源参数与中国地震台网中心给出的地震目录中深源地震参数进行对比,分析定位结果的平均偏差与标准偏差,给出适用于黑龙江省测震台网记录到的中国东北地区深源地震的定位方法。研究表明,对于黑龙江省测震台网记录到的东北地区深源地震,使用Hypo SAT方法进行定位,计算结果要优于使用LOCSAT定位方法的计算结果。
[Abstract]:Heilongjiang Province is located in the arc region of the northeast Eurasia plate, and sometimes a deep focal earthquake with a depth of 300-600 km occurs, and the energy released by the earthquake, that is, the magnitude of the earthquake, is large, and the range of the earthquake is also very large. These deep source earthquakes are within the monitoring scope of Heilongjiang Province Seismograph Network. How to carry out the localization work of these deep source earthquakes, determine the source parameters quickly and accurately, and select the best method to locate the deep source earthquakes, It has become an urgent problem to be solved. The results of this paper are helpful to the study of geodynamic characteristics in Northeast China to some extent, and also provide some help for earthquake prevention and disaster reduction in Northeast China. After the reconstruction and construction of the "Tenth Five-Year" project, the main positioning methods used in the daily monitoring of the seismic network in Heilongjiang Province are mainly the seismic location program with the MSDP man-machine interactive software in the JOPENS system. The commonly used software localization calculation methods include simplex method, adaptive method and HYP2000 Hypo SATLOCSAT, etc. Because the simplex method, adaptive method and HYP2000 method are not accurate for the depth calculation of this kind of deep source earthquake whose epicentral distance is less than 1000KM, therefore, Only LOCSAT and Hypo SAT methods are suitable for locating deep earthquakes in this area. Only by determining which of these two methods is more suitable for the processing of deep earthquakes recorded by Heilongjiang seismic network can the localization quality and positioning speed of deep source earthquakes in Heilongjiang seismic network be improved. Based on the data of 41 掳-46 掳Nian 128 掳-137 掳E from January 2008 to December 2016, the waveform data of deep focal earthquakes in the area of Mulling-Jilin Wangqing, Heilongjiang Province, are presented in this paper. The methods of LOCSAT and Hypo SAT, which are suitable for deep earthquake location in MSDP human-computer interaction software, are used to relocate these earthquakes, respectively. The measured focal parameters of the deep source earthquake are compared with the parameters of the deep source earthquake in the catalogue given by the China Seismic Network Center, and the mean deviation and the standard deviation of the location results are analyzed. The location method of deep source earthquakes recorded by Heilongjiang Province Seismograph Network is presented in this paper. The results show that the Hypo SAT method is better than the LOCSAT method in locating the deep earthquakes recorded by the Heilongjiang Seismograph Network.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P315

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