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1986年4月28日16时16分,在宜宾县白花区孔滩乡发生一次4.2级地震.据四川地震台网测定,震中位置为:北纬29°07′30″,东经104°39′10″.主震后至5月3日止,自贡地震台共记录余震4次,最大为2.4级.经现场考察,宏观震中在孔滩街附近,震中烈度为V度.自贡、宜宾等地普遍有感,富顺和荣县龙潭区个别人有感.震中区震害据初步调查,震中区建筑物有轻微损坏(见封底照片1、2).房屋梭瓦、掉瓦,少数民用烟囱掉砖,个别砖烟囱高出屋面部分被震倒.如孔滩乡政府土墙瓦房的厨房南端屋脊拉裂,檐口掉瓦.人武部办公室砖砌隔墙门上部竖向震裂,缝宽8毫米,长70厘米.乡农经公司
At 16:16 on April 28, 1986, a 4.2-magnitude earthquake occurred in Kongtan Township, Bahua District, Yibin County. According to the Sichuan Seismological Bureau, the epicenter was located at 29 ° 07’30 “north latitude and 104 ° 39’10 east longitude ”After the main shock until May 3, Zigong Seismic Station recorded a total of four aftershocks, a maximum of 2.4.After an on-site inspection, the macro epicenter near the Kong Tan Street, the epicenter intensity of V. Zigong, Yibin and other places generally Feeling, Fushun and Rongxian Longtan District, some people feel the epicenter earthquake damage According to preliminary investigation, the epicenter area buildings have minor damage (see the back cover photos 1, 2). Housing shuttle tile, tile, minority chimney off brick, Some brick chimney above the roof was knocked down.As Kongtan Township government wall tile wall south kitchen ridge crack, cornice off tile.WuBu office brick partition door upper vertical cracks, slit width 8 mm, 70 cm long. Rural agricultural company