Overview
- In the early hours of January 12, SSN reported a magnitude 4.1 quake southwest of Tonalá, Chiapas at 3:11 a.m. and a magnitude 3.1 near Pichucalco at 12:38 a.m., with no alert triggered in Mexico City.
- USGS logged 29 earthquakes over the past 24 hours across the United States and its territories, with the strongest a magnitude 4.3 in Alaska’s Rat Islands.
- SSN’s latest listings for January 11–12 show continued clustering of small events along Mexico’s Pacific states, including Oaxaca, Guerrero, Chiapas, Michoacán, Jalisco, Colima and Baja California.
- Monitoring agencies stress real-time public feeds—SSN’s “últimos sismos” and the USGS Latest Earthquakes map—and reiterate that exact earthquake prediction is not scientifically possible.
- Preparedness guidance from civil-protection authorities remains in effect, and SASMEX activates only for stronger events based on distance–magnitude thresholds.