A quake measuring 5.1 on the open-ended Richter scale hit Chiayi County in southern Taiwan Monday with no immediate damage reported, the Central Weather Bureau (CWB) said. The CWB said the earthquake, which took place at 5: 26 p.m., struck 15.9 kilometers southeast of Chiayi City seismic station at a depth of 14.3 kilometers. 'The quake has nothing to do with the magnitude 6.4 quake that hit southern Taiwan last week,' the CWB said. That earthquake, which rocked Jiasian in Kaohsiung County, was the strongest temblor to hit the southern part of the island in over a century. No casualties were reported, but the quake temporarily knocked out power in some areas and disrupted the country's high speed railway, which had yet to be restored to normal as of Monday. 