On 4 february 1975 , the commune or brigade leading cadres would have obtained information directly or indirectly from six different sources : ( 1 ) the general provincial warning relayed to them through city and county committees , ( 2 ) in the case of yingkou county , an evacuation order from the county committee , ( 3 ) nearby earthquake observatories , particularly the shipengyu observatory , ( 4 ) local amateur precursory monitoring groups such as the team of the haicheng observatory , ( 5 ) neighboring villages and industrial units , and ( 6 ) the foreshocks and the damage they were already causing 1975年2月4日,公社或大隊領(lǐng)導(dǎo)干部直接或間接從六個不同的來源獲得信息: ( 1 )通過市級與縣級革委會傳達(dá)給他們的總的省一級的警告; ( 2 )在營口的例子中,撤離的命令由縣革委會下達(dá); ( 3 )附近的地震觀測站,特別如石硼峪地震觀測站的情況; ( 4 )地方的業(yè)余前兆檢測工作組,如海城地震觀測站( “群測點” ) ; ( 5 )附近的村莊與企業(yè),與( 6 )前震以及已經(jīng)造成的損失。