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Scientists Spot 'Invisible' Fault In Chinese City Using Photos From 1960's, 1970's KEY POINTS They found several "previously unknown" earthquakes along the fault Further analysis shows the area along the fault may be due for another earthquake A team of scientists discovered an "invisible" fault line underneath a Chinese city, thanks to photos of the area taken from the 1960s and 1970s. The method could be used to find other such potentially active faults under cities. Earlier mapping showed that the Shuiyu fault line crosses Datong City in Shanxi Province, Northern China, the Seismological...

 E-Mail Decades-old aerial photos of Yudong District, Datong City in Shanxi Province, Northern China have helped researchers in their search for a fault hidden underneath the city's buildings and cement roads, researchers said at the Seismological Society of America (SSA)'s 2021 Annual Meeting. Analyzing these photos from the 1960s and 1970s allowed Junjie Ren and colleagues to reconstruct a digital elevation model along the Shuiyu fault, helping them identify the fault trace as it passes through Datong City. Trenching along the revealed fault trace found evidence of five previously unknown...