Since the early hours of today, Mexico‘s National Seismological Service (SSN) has been reporting seismic activity in real-time across the country. At the time of publication, no significant movement has been detected following the magnitude 4.2 earthquake that occurred at 21:43 hours in Oaxaca.
Mexico’s location at the convergence of several tectonic plates makes it particularly prone to earthquakes. Specifically, the country lies at the intersection of the Cocos, Pacific, and North American plates, as well as smaller plates like the Caribbean and Rivera. Most seismic activity in Mexico is generated by the subduction of the Cocos Plate under the North American Plate along the Mesoamerican Trench, a process that occurs off the coasts of states like Guerrero, Oaxaca, Chiapas, and Michoacán, resulting in frequent moderate seismic events in these regions.
In addition to subduction, intraplate faults within the continental territory also contribute to seismic activity. For instance, the interaction of different segments of the North American Plate in central and southern Mexico triggers earthquakes along the San Andreas Fault in Baja California and other active tectonic structures in the Mexico Valley.
Mexico’s location within the Pacific Ring of Fire, a region known for its high seismic and volcanic activity, exacerbates the frequency of earthquakes in the country. This zone accounts for approximately 75% of the world’s seismic activity.
Moreover, the type of soil in certain urban areas, such as Mexico City, amplifies the effects of earthquakes. The majority of the city was built on what was once a lake, and the soft sedimentary layers underlying the city intensify seismic waves, causing greater damage.
The SSN plays a crucial role in monitoring and reporting seismic activity in Mexico, enabling the prompt dissemination of essential information to protect lives and property. It is essential for the public to stay informed and prepared in case of an earthquake by familiarizing themselves with safety protocols and keeping emergency supplies at hand.
