Update: 5.8 magnitude earthquake strikes close to Puerto Madero, Mexico on Aug. 18

Published Sep 7, 2026

TAPACHULA, Chis. — A 5.8 magnitude quake occurred close to Puerto Madero on Tuesday night, according to the U.S. Geological Survey.

At 05:02 UTC (23:02 local time), a tremor jolted the region at a depth of 10 km, with its epicenter approximately 98 km southwest of Puerto Madero. The magnitude was originally reported as 5.7 but later upgraded to 5.8.

Did you feel it?

If you felt the earthquake, you can report it through the USGS Felt Report form.

Impact and estimated losses

The USGS categorized this as a Green Alert, which means there is a low likelihood of casualties and damage. Recent earthquakes in this area have caused secondary hazards such as landslides that might have contributed to losses.

Structure information summary

Overall, the population in this region resides in structures that are a mix of vulnerable and earthquake resistant construction. The predominant vulnerable building types are mud wall and adobe block with concrete bond beam construction.

Quakes last week

Over the last week, the area has experienced three earthquakes of magnitude 2.5 or above. The largest one was a 5.3 magnitude earthquake that was reported in the same region on Aug. 16.

Area struck by 6.2 quake in 1991
The area has a history of significant seismic activity. A magnitude 6.2 earthquake struck 2.5 miles southeast of Patzún in Patzún on Sep. 18, 1991, at a depth of 3.1 miles.

Source: The U.S. Geological Survey