In the wake of a four-point-five magnitude earthquake in Gyeongju on Monday evening, concerns are growing over the preservation of cultural treasures housed in the capital city of the ancient Silla Kingdom.

The Gyeongju Municipal Government said as of Monday night following the tremor, there was no reported damage to the cultural heritages.

However, experts say remnants of damage can be revealed later as the ground underneath cultural assets may have been weakened due to the three massive earthquakes so far this month, as well as heavy rainfall during the Chuseok holiday period.

Fifty-five reports of damages to the cultural heritages in Gyeongju were filed in the aftermath of the two previous earthquakes last Monday. In particular, roof tiles of the main building of the city's landmark Bulguk Temple fell off and the upper stone of its main tower, Dabo, caved in.

Cheomseongdae Observatory, which initially reported no damage, was shown in a later analysis to have tilted two centimeters northward and its upper stone on the corner revealed a five-centimeter gap.