In the beginning, the land uplift that followed the Ice Age was stronger than today. For the first two thousand years, the land kept rising by approx. ten centimetres a year, or around ten metres a century. Such strong uplift did not go without consequences: approx. 9,000 years ago, there was a powerful earthquake with Lauhanvuori as the epicentre. The earthquake at Lauhanvuori left a scar approx. six kilometres in length in the ground and bedrock when the bedrock section to the west of Lauhanvuori was pushed as much as two metres higher than the eastern section. This fault can still be identified in the terrain, although it is difficult to spot. Among other things, it splits the northern part of Kivijata rock field. While the fault line is difficult to see in the terrain, it is visible in an aerial photograph taken on a summer evening, in which the fault casts a faint shadow across the banks of Kivijata. In Finland, faults resulting from post-glacial earthquakes are known especially from Central Lapland. Lauhanvuori fault is the southernmost known post-glacial fault in Finland. It was only found in accurate laser scanning measurements carried out by the National Land Survey of Finland in 2014.