全国台网地震图缩微推出新模式

A NEW PATTERN FOR MICROFILMING SEISMOGRAMS OF NATIONAL SEISMIC NETWORK

地震图缩微工作，原以中周期ＳＫ记录为主，全国基准台１９７９－１９９３年的全部ＳＫ记录图己完成缩微存档。为适应科研需要，从１９９４年起，缩微任务调整为同时完成ＳＫ台网和ＬＰ台网的有震记录图。按照缩微新模式，ＳＫ和ＬＰ两种记录不仅都实现了缩微化，而且缩微资料由书本型变为信息型，地震缩微胶片的利用价值大大提高。

Seismogram microfilming used to be made principally on medium-long period SK recordings,with all SK seismograms from the national standard seismic network during the period of 1979 1993 being microfilmed for archiving. To meet the requirements of scientific researches,all earth-quake seismograms from both SK and LP networks are microfilmed beginning from 1994.Ac-cording to the new pattern of microfilming,not only the microfilming of both SK and LP record-ings are achieved,but also the microfilming data would be changed from book type into informa-tion type,thus greatly increasing the applicability of seismogram microfilms.