CAJ | 학술논문

针对震前震区上空电离层扰动是否受到地震活动影响这一难点，提出了一种组合式电离层扰动时空分析法。基于该方法，在震中附近设置了一个监测点 A（32．5°N，115°W）及相近地磁纬度的两个参考点 B（32．5°N，100°W）和 C（32．5° N，55°E），运用滑动四分位距法的双重检测标准分别检测了上述三点垂直总电子含量（VTEC）的时序变化。结合空间天气情况分析出最有可能与地震活动相关的异常时段，并提取出了上述异常时段的 VTEC 空间异常分布，结果显示在该异常时段地震孕育区及其附近上空电离层出现了持续的正异常扰动现象。最终研究表明：4月4号出现的 VTEC 异常与本次地震孕育活动有关，且异常峰值主要集中于震中东、南侧。
침대진전진구상공전리층우동시부수도지진활동영향저일난점，제출료일충조합식전리층우동시공분석법。기우해방법，재진중부근설치료일개감측점 A（32．5°N，115°W）급상근지자위도적량개삼고점 B（32．5°N，100°W）화 C（32．5° N，55°E），운용활동사분위거법적쌍중검측표준분별검측료상술삼점수직총전자함량（VTEC）적시서변화。결합공간천기정황분석출최유가능여지진활동상관적이상시단，병제취출료상술이상시단적 VTEC 공간이상분포，결과현시재해이상시단지진잉육구급기부근상공전리층출현료지속적정이상우동현상。최종연구표명：4월4호출현적 VTEC 이상여본차지진잉육활동유관，차이상봉치주요집중우진중동、남측。
A combined spatial-temporal analysis for ionospheric anomalies is proposed due to the difficulty whether pre-earthquake ionospheric anomalies over the earthquake zone are caused by the seismicity or not.Based on the approach above, the sliding interquartile range method with double checking standard was employed to detect vertical total electron content (VTEC)time series of monitoring point A(32.5°N,115°W)near the epicenter and reference point B(32.5°N,100°W)and C (32.5°N,55°E)which are similar to point A in geomagnetic latitude.Combined with space weather conditions,the most likely abnor-mal period related to seismic activity has been achieved,and then spatial VTEC anomalies have also been sucessful extracted in the pe-riod of abnormal time above and the results show that the positive anomalies appear continually over the earthquake preparation zone and its nearby.Final research shows that positive anomalies over the earthquake preparation zone and its nearby on April 4 are related to the seismic activity and the VTEC anomalous peaks mainly concentrate in the east and south of the epicenter.