CAJ | 학술논문

“区域-时间-长度算法”是一种检测地震活动水平相对变化的计算方法，利用该算法对福建及邻近海域近年来4次MD5．0以上地震进行回顾性检验。结果认为，每个震例的研究起始时间要根据每个地震的犞RTL背景活动水平来定，震前4个震例的均方差都超过3．5σ，3个震例的犞RTL极大值超过150，一个只有21．6。说明该地区MD 5．0以上地震前，犞RTL活动水平相对于背景活动水平有明显变化，犞RTL可作为该地区地震预报的一项指标。
“구역-시간-장도산법”시일충검측지진활동수평상대변화적계산방법，이용해산법대복건급린근해역근년래4차MD5．0이상지진진행회고성검험。결과인위，매개진례적연구기시시간요근거매개지진적교RTL배경활동수평래정，진전4개진례적균방차도초과3．5σ，3개진례적교RTL겁대치초과150，일개지유21．6。설명해지구MD 5．0이상지진전，교RTL활동수평상대우배경활동수평유명현변화，교RTL가작위해지구지진예보적일항지표。
Region-time-length algorithm (RTL)is a computation method for detecting relative change of earthquake activity level.Using this method,four earthquakes (MD≥ 5. 0)that occurred in Fujian and its offshore area for the past few years have been tested retrospective in this paper.The result shows that,research starting time of every earthquake is determined by itsVRTL background activity level,respectively.The mean square errors of the four earthquakes have all passed 3. 5σbefore shock.TheVRTL maximum values of three earthquakes have passed 150,and one has 21.6 only.This illustrates thatVRTL activity level have all marked variation relative to background activity level beforeMD 5. 0 earthquakes in this area.VRTL may be a index of earthquake prediction in this area.