With the increasing population and the consequent needs for transport facilities, the construction\nof tunnels in urban environments is fast growing. Tunneling at each depth of the soil, causes\nchanges in the earth�s surface; this is more important about urban areas tunnels, especially when\ncrossing the residential areas, so having knowledge of their performance is really important. Some\nof the consequences of underground tunneling are earth surface moving around the tunnel,\nmovement of tunnel�s surrounding and changes in earthquake acceleration. The performance and\nbehavior of underground structures have been studied by numerous researchers, but the effect of\ntunneling on earthquake records and its effects on aboveground structures have been getting less\nattention. The current article will try to study and examine the changes in seismic velocity at\nground level, structural response spectrum, and Fourier spectrum with digging a circular tunnel.\nThe results show that digging a circular tunnel at ground level will cause a change in the earthquake\nrecords profile.
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