CAJ | 학술논문

国际上新近发展的“基于概率的完整性震级”（P MC ）方法，具有可考察地震定位中由于台站人为选择等造成的台网监测能力下降，以及避免传统基于G-R关系的统计算法因地震数目过少而无法评估等优点．本研究利用P MC方法，计算得到内蒙古区域地震台网39个台站对周边地震事件的检测概率及台网检测概率．单台检测概率结果显示：P MC方法能够客观地反映39个台站对地震事件的检测能力；因台网布局等影响，内蒙古区域地震台网中西部和中东部地区的台站检测能力较强，而靠近蒙古、俄罗斯边境的台站，阿拉善右旗附近地区的台站，以及邻近吉林、黑龙江等地区的台站检测能力较低．合成检测概率结果显示，由于邻省台站的引入，全区80％的地区基于概率的最小完整性震级MP 达到2．2左右，其余地区MP达到3．3左右．为提高地震台网监测能力，建议在监测能力较弱的中蒙交界地区、东北部地区，以及阿拉善左旗以西地区适度加密台站，进一步优化台网布局．
국제상신근발전적“기우개솔적완정성진급”（P MC ）방법，구유가고찰지진정위중유우태참인위선택등조성적태망감측능력하강，이급피면전통기우G-R관계적통계산법인지진수목과소이무법평고등우점．본연구이용P MC방법，계산득도내몽고구역지진태망39개태참대주변지진사건적검측개솔급태망검측개솔．단태검측개솔결과현시：P MC방법능구객관지반영39개태참대지진사건적검측능력；인태망포국등영향，내몽고구역지진태망중서부화중동부지구적태참검측능력교강，이고근몽고、아라사변경적태참，아랍선우기부근지구적태참，이급린근길림、흑룡강등지구적태참검측능력교저．합성검측개솔결과현시，유우린성태참적인입，전구80％적지구기우개솔적최소완정성진급MP 체도2．2좌우，기여지구MP체도3．3좌우．위제고지진태망감측능력，건의재감측능력교약적중몽교계지구、동북부지구，이급아랍선좌기이서지구괄도가밀태참，진일보우화태망포국．
As a new developed method for estimating earthquake detection prob-abilities,the probability-based magnitude of completeness (PMC)method can avoid decreasing the detection capability resulted by artificial factors,and can access the detection capability in the areas where traditional Gutenberg-Richter relationship-based method is ineffective due to lack of earthquakes.In this study,we determine the detection probability of all 39 stations of the Inner Mongolia seismic network by using the PMC method.The results show that the PMC method can reflect the network earthquake monitoring capacity objective-ly.The detection probability is better than other regions in the midwestern and the mid-eastern region of Inner Mongolia,due to better coverage of seismic sta-tions,however,it is poor in the Alxa Youqi region,the Sino-Russian border, and Sino-Mongolia border.Synthesized detection probability results indicate that minimum probability-based magnitude of completeness,MP,can reach ML2.2 in the 80%area of the Inner Mongolia when the stations of the neighbor-ing networks are involved,and only about ML3.3 in other areas.In order to en-hance the monitoring capacity of Inner Mongolia regional seismic network,more stations are still needed to emplace in the Sino-Mongolia border region,the northeastern region of Inner Mongolia,and to the west of Alxa Zuoqi to opti-mize the layout of seismic network.