Overview
- The SSN reported a magnitude 4.0 earthquake north of Matías Romero, Oaxaca at 5:10 a.m. Friday, with no injuries or damage.
- A separate magnitude 4.0 struck 66 km southwest of Pinotepa Nacional late Thursday at 11:44 p.m., and officials said its intensity was low.
- Sonora’s civil protection office logged a magnitude 2.9 offshore of Guaymas in the Gulf of California early Thursday, with no impacts in nearby communities.
- Instruments also detected small events near Puerto Escondido, Cihuatlán, and in Chiapas on Thursday, all in the 3 to 4 range and typical of daily activity.
- These quakes trace active boundaries where the Pacific and Cocos plates interact with North America, and Mexico’s alert system only issues warnings for events expected to cause strong shaking.