An earth tremor measuring 2.8 on the Richter Scale, which occurred in the Irish Sea off Bray Head, was felt in parts of Wickow and Wexford early this morning.
The seismic event was recorded by the School of Cosmic Physics, which is part of the Dublin Institute for Advanced Studies.
According to the Experimental Officer at the School, Tom Blake, the tremor took place 30km off shore at a depth of 9km.
No structural damage would normally be expected at a level of 2.8, but Mr Blake says the tremor happened in the exact same location where other tremors were recorded in 1951 and 1984.
Significant structural damage was recorded in the 1984 tremor, which measured 5.4 on the Richter Scale, and the School of Cosmic Physics says there is now a need for a National Seismic Network to monitor tremors off the Irish coast.
Mr Blake says there now appears to be a seismic event of some significance here every 50 years, and the Government should be taking action and providing resources before something more serious happens.