Dominica is hit by the most destructive earthquake in its history. The northern half of the island sustains the most damage, especially the town of Portsmouth. In neighboring Guadeloupe, one person is killed.

Dominica, officially the Commonwealth of Dominica, is an island country in the Caribbean. It is part of the Windward Islands chain in the Lesser Antilles archipelago in the Caribbean Sea. The capital, Roseau, is located on the western side of the island. Dominica's closest neighbours are two constituent territories of the European Union, both overseas departments of France: Guadeloupe to the northwest and Martinique to the south-southeast. Dominica comprises a land area of 750 km² (290 sq mi), and the highest point is Morne Diablotins, at 1,447 m (4,747 ft) in elevation. The population was 71,293 at the 2011 census.

An earthquake – also called a quake, tremor, or temblor – is the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves. Earthquakes can range in intensity, from those so weak they cannot be felt, to those violent enough to propel objects and people into the air, damage critical infrastructure, and wreak destruction across entire cities. The seismic activity of an area is the frequency, type, and size of earthquakes experienced over a particular time. The seismicity at a particular location in the Earth is the average rate of seismic energy release per unit volume.

Portsmouth is the second largest town in Dominica, with 3,630 inhabitants. It is located on the shore of a natural Harbor, Prince Rupert Bay, in Saint John Parish on the north-west coast of Dominica. The area was called Ouyouhao by the Kalinago and Grand Anse by the French. The Indian River is Portsmouth’s southern border and Cabrits National Park is located on a peninsula to the north of town.

Guadeloupe is an overseas department and region of France in the Caribbean. It consists of six inhabited islands—Basse-Terre, Grande-Terre, Marie-Galante, La Désirade, and two Îles des Saintes—as well as many uninhabited islands and outcroppings. It is south of Antigua and Barbuda and Montserrat and north of Dominica. The capital city is Basse-Terre, on the southern west coast of Basse-Terre Island; the most populous city is Les Abymes and the main centre of business is neighbouring Pointe-à-Pitre, both on Grande-Terre Island. It had a population of 395,726 in 2024.