Three Earthquakes Shake Southern Mexico
A series of three earthquakes struck the Pacific coast of southern Mexico on July 17, 2026, with the strongest measuring Magnitude 7.3 southwest of Aquiles Serdán, Chiapas. The powerful earthquake was followed by a Magnitude 5.3 southwest of Puerto Madero and a Magnitude 4.7 west-southwest of Aquiles Serdán, indicating an active seismic sequence along Mexico’s southern coastline.
Earthquake Summary
- Magnitude 7.3 – Southwest of Aquiles Serdán, Mexico
- Magnitude 5.3 – Southwest of Puerto Madero, Mexico
- Magnitude 4.7 – West-southwest of Aquiles Serdán, Mexico
The largest earthquake occurred offshore near the Chiapas coast at a shallow depth of approximately 10 kilometers (6.2 miles), increasing the potential for strong ground shaking across the region.
Tsunami Alert Issued
Following the magnitude 7.3 earthquake, tsunami alerts were issued for portions of Mexico’s Pacific coastline. Officials warned that hazardous waves could affect coastal areas near the epicenter while emergency agencies evaluated the threat. Authorities urged residents in vulnerable coastal communities to remain alert and follow official evacuation instructions if necessary.
Shaking Felt Across the Region
Strong shaking was reported throughout southern Mexico, including the state of Chiapas, and was also felt in neighboring Guatemala and El Salvador. Emergency officials immediately began assessing infrastructure, roads, utilities, and buildings for possible damage. At the time of reporting, damage assessments were still ongoing.
Why Multiple Earthquakes Occurred
Large earthquakes are commonly followed by aftershocks as tectonic plates adjust after the main rupture. The magnitude 5.3 and 4.7 earthquakes may represent significant aftershocks associated with the magnitude 7.3 event. Southern Mexico lies along the boundary where the Cocos Plate subducts beneath the North American Plate, making the region one of the most seismically active in North America.
Safety Reminder
If you are located in an area affected by the earthquakes:
- Move away from damaged buildings and downed power lines.
- Watch for possible aftershocks.
- If you are near the coast, monitor official tsunami guidance before returning to beaches or harbors.
- Follow instructions from local emergency management and civil protection officials.
