7.4 earthquake strikes off Chiapas coast, activating a tsunami alert

A magnitude 7.4 earthquake struck off the coast of Chiapas, Mexico, on Friday morning, triggering a tsunami alert for the southern Pacific coastline and prompting emergency evacuations in major cities. The quake, recorded at 8:49 a.m. local time at a depth of 10 kilometers, was centered approximately 58 kilometers from Puerto Madero, Chiapas, according to the National Seismological Service. President Claudia Sheinbaum reported no initial damage after speaking with the governors of Chiapas and Tabasco, but authorities urged residents in coastal areas to stay away from the ocean until late afternoon.

Powerful Tremor and Aftershock Sequence

The initial earthquake was felt intensely in Villahermosa, the capital of Tabasco, about 500 kilometers to the north, and as far as Antigua, Guatemala, roughly 300 kilometers east. In the following 68 minutes, the U.S. Geological Survey recorded five significant aftershocks: a magnitude 5.3 at 9:14 a.m., a 5.1 at 9:19 a.m., a 6.0 at 9:20 a.m., a 5.0 at 9:30 a.m., and a 5.1 at 9:57 a.m. The tremors caused buildings to sway and hundreds of workers in public and private offices in Villahermosa to evacuate. Authorities immediately activated security and verification protocols, with personnel from the Energy Ministry, state oil company Pemex, the Governor’s Palace, and municipal City Hall taking positions at designated shelters.

Tsunami Alert and Coastal Evacuations

The Pacific Tsunami Warning Center issued an alert for Mexico’s southern Pacific coast, warning of possible tsunami waves. President Sheinbaum advised residents of Oaxaca and Chiapas to stay away from the ocean until late afternoon. While no tsunami waves were immediately reported, emergency services monitored the situation closely. The Tabasco State Civil Protection Institute began structural reviews of buildings, and citizens were urged to remain calm, ignore rumors, follow official sources, and report any damage to 911.

Government Response and Monitoring

President Sheinbaum took to social media after speaking with the governors, confirming that initial damage assessments showed no major impacts. The federal Security Ministry in Mexico City noted that some residents felt the earthquake, but the seismic alarm was not activated because the tremors did not pose a risk to the capital. Nonetheless, SSC agents conducted patrols and preventive tours, and helicopter overflights were carried out. The National Coordination of Civil Protection maintained communication with state and municipal units and members of the National Emergency Committee.

Broader Impact and Public Safety

The earthquake was felt across a wide region, including in Guatemala, where residents reported shaking. In Mexico, the tremors prompted evacuations of hundreds of people from buildings in Villahermosa, including government offices. Emergency services continued monitoring throughout the morning, with authorities emphasizing the importance of relying on official information. No casualties or major structural damage were reported in the immediate aftermath.

Looking ahead, seismic activity in the region is being closely watched, as aftershocks are common following such a large earthquake. Officials urge residents in coastal areas to heed tsunami alerts and remain prepared for further tremors. The event underscores the importance of robust emergency protocols and public awareness in seismically active zones like southern Mexico.