Overview
- Mexico’s seismic service reported early‑morning events on February 4, including magnitude 4.2 east of Santa Rosalía, Baja California Sur, magnitude 4.0 near Matías Romero and Crucecita in Oaxaca, magnitude 4.0 northwest of Guadalupe Victoria, Baja California, and magnitude 4.1 south of Ciudad Hidalgo, Chiapas.
- On February 3, the SSN listed two quakes in Mexico—a magnitude 4.1 northwest of Cintalapa, Chiapas, and a magnitude 4.0 northwest of La Mira, Michoacán—falls that did not meet SASMEX activation thresholds.
- UNAM researchers presented preliminary findings that the persistent microsismos in the Plateros–Mixcoac area reflect surface cracks tied to movement on the active Contreras Fault, noting these small events are longstanding and expected to continue.
- Peru’s IGP confirmed a magnitude 4.0 quake on February 2 near Santa Lucía in Lampa, Puno, following late‑January reports that included events up to magnitude 5.0 near Marcona in Ica and other moderate activity in Arequipa.
- USGS near‑real‑time logs show frequent small events across North America and the Caribbean, including a recent 2.8 near Gilroy, California, and a 5.1 near Adak, Alaska, underscoring ongoing routine seismicity and the value of official monitoring tools.