Locals in Kilcar, Ardara and Ballyshannon all reported feeling the earth move.
A 2.1 magnitude earthquake was recorded in Co. Donegal last night, the second quake this month in the county.
The tremor occurred at 9.18pm last night in the south of Donegal, with the epicentre about 15km from Donegal Town.
Geological Survey Ireland tweeted: "A magnitude 2.1 earthquake occurred in Co Donegal on 29 April 2019 at 21:18 local time.
"The earthquake was detected by the Irish National Seismic Network operated by DIAS Geophysics in co-operation with Geological Survey Ireland."
A magnitude 2.1 earthquake occurred in Co Donegal on 29 April 2019 at 21:18 local time. The earthquake was detected by the Irish National Seismic Network operated by @dias_geophysics in co-operation with Geological Survey Ireland @Dept_CCAE https://t.co/thdwBpb2N8 pic.twitter.com/kPvThHokkA
— Geological Survey IE (@GeolSurvIE) April 29, 2019
It comes just three weeks after a 2.4 magnitude earthquake was recorded off the coast of Donegal on April 7.
Locals in Kilcar, Ardara and Ballyshannon all reported feeling the earth move and the quake was recorded at six seismic stations in Donegal, Galway, Kerry, Wexford, Dublin and Louth.
The INSN are asking those who felt shock waves to fill in an online questionnaire here to help gather data on the event.