The vast majority of the population and property ofArgentina is located in the eastern part of the country, where the seismic hazard is particularly low. However, there are still a number of important settlements near the Andes, which have suffered considerable human and economic losses throughout time. The most relevant event occurred in the Province of San Juan in January 1944 causing more than10,000 fatalities. In November 1977 a similar event happened in the same province causing approximately 80 million USD in economic losses.