A minor earthquake measuring 3.5 on the Richter scale was detected northeast of Antigua and Barbuda on the evening of Monday, October 20, 2025. The seismic event, recorded by the University of the West Indies (UWI) Seismic Research Centre, occurred at approximately 9:09 p.m. local time. The tremor originated at a depth of 20 kilometers, with its epicenter pinpointed at coordinates 17.99°N, 62.43°W. This location places the quake approximately 117 kilometers northwest of St. John’s, 83 kilometers northeast of Basseterre, St. Kitts and Nevis, and 135 kilometers north of Brades, Montserrat. Although some residents in Antigua experienced a brief shaking, there have been no reports of structural damage or injuries. The UWI Seismic Research Centre emphasized that the data was automatically generated and remains preliminary, awaiting further analysis by experts. Antigua and Barbuda is situated in a seismically active region of the eastern Caribbean, where moderate tremors are not uncommon due to the ongoing interaction between the North American and Caribbean tectonic plates.