A magnitude 5.9 earthquake occurred at 05:54:55 UTC on 31 July 2019 (30 July 2019 at 23:54:55 local time), 24.6 km (15.3 mi) N of La Libertad, El Salvador; 45.9 km (28.5 mi) N of Santa Tecla, El Salvador and 46.6 km (28.9 mi) NNE of San Marcos, El Salvador. Initial estimates from the United States Geological Survey (USGS) located the epicentre of the event (Figure 1) at 13.266°N, 89.338°W, and at a depth of 72.5 km (45 mi). Nicaragua was the only CCRIF member country where peak ground acceleration, computed with the SPHERA model, was greater than 0.01g for this earthquake.