Overview
- The Chilean Centro Sismológico Nacional confirmed a magnitude 6.0 earthquake off Valparaíso with an epicenter west of Quintero and a depth near 30 kilometers on Sunday, May 31.
- Chile’s emergency agency Senapred and the CSN began post‑event monitoring, reported several smaller aftershocks, and said no tsunami warning or immediate major damage had been found.
- Android Earthquake Alerts sent automatic notifications to many users in Mendoza and other distant areas, though reception varied because the phone feature must be enabled on each device.
- Mexico’s Servicio Sismológico Nacional recorded multiple small quakes on May 30, including a 4.1 near Cihuatlán, Jalisco, a 3.9 near Pijijiapan, Chiapas, and a shallow 2.5 microsismo in Chalco, Estado de México, with no reported injuries or significant damage.
- Officials emphasized that both countries sit on the Pacific Ring of Fire, that SASMEX only activates for events likely to produce strong effects, and that the key next concerns are aftershock monitoring and local infrastructure checks.