An earthquake is a sudden rapid shaking of the earth caused by the breaking and shifting of rock beneath the earth’s surface. The entire Region is susceptible to earthquakes; however, the effects may be felt differently in some areas based on the type of geology. The US Geological Survey (USGS) monitors and reports on earthquake activity. Their records indicate a lack of historical and instrumental reports of strong earthquakes in Connecticut. This suggests that the State experiences only very minor seismic activity, even when compared to other States in the northeast region.Earthquakes can occur at any time without warning. Damage to buildings can range from minor cracking of walls and foundations to complete collapse. Earthquakes can cause disruption of utility services, landslides, flash floods, fires, avalanches, and tsunamis.