This earthquake is one of the most powerful earthquakes of the 20th century. The main shock epicenter occurred in the area of Quebec City and Shawinigan and was felt as far south as Virginia, and as far west as Mississippi. It caused damage in three separate areas. The first had extreme damage constricted to a narrow belt 20 miles long on both shores of the Saint Lawrence River near the epicenter. In this area, damage at the villages of Baie-Saint-Paul, Saint-Urbain, Les Éboulements, Pointe-au-Pic, La Malbaie, Tadoussac and the other nearby villages of Ste-Anne-de-la-Pocatière, St-Pacôme, Rivière-Ouelle, Saint-Philippe, Saint-Denis, and Saint-Pascal on the south shore, was remaining mostly to the strength of the earthquake's irritation in some reasons by the deep grainy soil on which the destroyed buildings were built. The two other damaged areas were Quebec City and in the Trois-Rivières - Shawinigan regions where the destruction was worst, not so much to the strength of the earthquake, as to the uneven nature of the landscape. A total of 55 aftershocks were recorded, which lasted for weeks, ranging from magnitude 5 to 2. Over the years, several studies were published on the 1925 Charlevoix-Kamouraska earthquake, some as recently as 1999.