Overview
- The National Seismological Service reported no earthquakes on Monday, December 15, following two small events the previous evening.
- A magnitude 4.1 earthquake struck at 19:15 on December 14 southeast of Ciudad Hidalgo, Chiapas, at a depth of 38.5 km, according to SSN data.
- A second event of magnitude 4.0 occurred at 20:12 southwest of Cihuatlán, Jalisco, with a depth of 16.1 km, the agency reported.
- Mexico City’s seismic alert did not activate because SASMEX triggers depend on both magnitude and distance, with higher magnitudes required for more distant epicenters.
- Officials reiterated preparedness guidance, urging people to stay calm, move to safety zones, avoid windows and heavy furniture, and wait until shaking stops before using stairs or elevators.