(Top) Map showing the epicenters (grey circles) of large earthquakes since 1990 (SSN, 2021). The red circle and cross mark the epicenter of the September 2021 Acapulco earthquake reported by the SSN and USGS, respectively. The earthquake’s focal mechanism (beachball) is presented. Blue arrows point to the epicenters of the deadliest and the largest earthquakes in Mexican history. (Bottom) Map showing the year of occurrence of earthquakes. Open triangles represent the seismic stations from the SSN. Yellow and red areas represent areas where slow slip events and tectonic tremors occur. Dashed circles represent the epicenters of the latest large earthquakes located inside the gap. The green arrow points to the Acapulco earthquake.