Overview

• Mexico records about 90 earthquakes each year of magnitude greater than 4, according to the National Seismological Service.
• The SSN, part of UNAM, monitors seismicity nationwide and provides timely, accurate information on events.
• A distributed network of seismic stations detects and logs ground motion in real time across the country.
• SSN analysts determine each event’s location, magnitude and depth to inform civil protection and scientific work.
• Frequent shaking stems from interactions among the Cocos, North American, Pacific and Caribbean plates, with Cocos Plate subduction off Guerrero, Oaxaca and Michoacán driving many quakes felt in the capital.