Overview
- Peru’s IGP reported a magnitude 4.9 quake at 02:51 on January 29, 50 km southwest of Marcona (Nasca) at 40 km depth, with intensity IV and no major damage.
- A second Peruvian event reached magnitude 3.9 at 19:53 near Mollendo in Arequipa at 50 km depth, registering intensity III, according to the IGP.
- Mexico’s SSN logged two Oaxaca quakes on January 28–29—a magnitude 4.2 southeast of Salina Cruz and a magnitude 4.1 northeast of Unión Hidalgo—with no alert activation or reported damage.
- USGS listings for January 28–29 show numerous small quakes across Alaska, California, Hawaii and Puerto Rico, with a magnitude 3.2 near Toyah, Texas the strongest in the continental U.S. on January 28.
- Agencies continue near‑real‑time monitoring and public guidance in these active tectonic zones, noting that recent magnitudes did not meet early‑warning thresholds.