CAJ | 학술논문

根据南北地震带区域内洞体应变观测资料，利用小波分析方法提取年尺度以上的变化趋势，并结合南北地震带上部分布设的GPS观测网点得到的基线变化特征，重点分析了GPS基线趋势变化异常的群体性与南北带动力环境及该区域MS6以上地震之间的对应关系。分析结果表明：①南北地震带自2000年以来呈现整体性趋势受压变化；②2000～2004年南北带表现为压应变增强，2008年汶川MS8地震前该地区同样呈现压应变增强现象，且压缩速度明显增大；③2006年出现的显著性群体趋势异常变化与GPS基线群体性转折有一定的一致性。
근거남북지진대구역내동체응변관측자료，이용소파분석방법제취년척도이상적변화추세，병결합남북지진대상부분포설적GPS관측망점득도적기선변화특정，중점분석료GPS기선추세변화이상적군체성여남북대동력배경급해구역MS6이상지진지간적대응관계。분석결과표명：①남북지진대자2000년이래정현정체성추세수압변화；②2000～2004년남북대표현위압응변증강，2008년문천MS8지진전해지구동양정현압응변증강현상，차압축속도명현증대；③2006년출현적현저성군체추세이상변화여GPS기선군체성전절유일정적일치성。
According to the crustal deformation observation data of strain meters observed in cafes distributed along the north-south seismic belts,we use the wavelet analysis to extract the trend change with the annual scale. Then we combine the trend changes with the changes of GPS baseline measurement distributed along the north-south seis-mic belts to analyze the relationship between the abnormal group and the seismic tendency of above Ms6 earth-quakes occurred along the north-south seismic belt. At the same times we discuss the dynamic environment and the seismicity in this region. Our result shows that the block of the north-south seismic belt since the year of 2000 was in the condition of an overall trend of pressure change. During the period from 2000 to 2004 the strain of the north-south seismic belt increases sharply. Before the 2008 Wenchuan Ms8 earthquake in this area,both strain and com-pressional speed increased. In 2006 there was some of certain consistency between the group abnormal trend chan-ges and the group changes of GPS baseline observation data.